Coal Mines In China Research Articles

Defining the Primary Work Stress Factors of Chinese Coal Miners-A Mixed-Methods Study.

Studies have indicated that coal miners in China have higher levels of perceived job stress. However, few studies have investigated the work stress structure of coal miners. Our study focused on the work stress of coal miners in China, with a primary aim to determine the work stress structure of coal miners in China using a mixed-methods approach. Semi-structured interviews were performed with thirty-three people (team leaders and frontline coal miners) conducted with participants from various state-owned large- and medium-sized coal mines in China. Grounded theory was used to construct an initial model for the concept of coal miners' work stress. Using the results of this initial survey and findings in the existing literature, we then constructed a preliminary questionnaire regarding coal miners' work stress and administered the questionnaire to 900 coal miners in the Shaanxi, Henan, Inner Mongolia, and Gansu provinces. The results show that the work stress structure for coal miners differs from that for other occupational types in China, due to differences in the Chinese culture and foreign cultural influences. We revised our questionnaire based on these considerations and administered a new survey to the frontline production workers in coal mines. The preliminary questionnaires were revised and analyzed through exploratory and confirmatory factor analysis, resulting in a final formal model for work stress, which was supported by content and structural validity. In this research, we used the framework of grounded theory to conduct an empirical analysis of the structure model of coal miners' work stress. The findings support that the primary work stress factors of Chinese coal miners included the stress of the work environment, job responsibility, interpersonal relationships, career development, the family environment, and organizational systems. Coal enterprises should therefore always take these factors into consideration when developing and implementing safety management policies aimed at to improve the occupational health status of coal miners.

Research on a Risk Early Warning Mathematical Model Based on Data Mining in China’s Coal Mine Management

The degree of informatization of coal mine safety management is becoming higher and higher, and a large amount of information is generated in this process. How to convert the existing information into useful data for risk control has become a challenge. To solve this challenge, this paper studies the mathematical model of coal mine risk early warning in China based on data mining. Firstly, the coal mine risk data was comprehensively analyzed to provide basic data for the risk prediction model of data mining. Then, the adaptive neuro-fuzzy inference system (ANFIS) was optimized twice to build the coal mine risk prediction model. By optimizing the calculation method of the control chart, the coal mine risk early warning system was proposed. Finally, based on the coal mine risk early warning model, the software platform was developed and applied to coal mines in China to control the risks at all levels. The results show that the error of the optimized ANFIS was reduced by 66%, and the early warning error was reduced by 57%. This study aimed to provide implementation methods and tools for coal mine risk management and control, and data collected has reference significance for other enterprises.

Microseismic response difference and failure analysis of roof and floor strata under dynamic load impact

The disaster induced by dynamic loads in the coal mining process seriously affects the safe production of coal mines. A new method for failure evaluation of roof and floor strata under dynamic load impact is proposed in this paper. The key roof strata breaking and periodic weighting experienced by the 9212 working face of the Dongpang Coal Mine in China while passing through the abandoned roadway is taken as the research background. Firstly, the research stages are divided through theoretical analysis and microseismic monitoring, and then the plane, profile distribution and spatial position relationship of microseismic events in different stages are analyzed. After that, the energy variation coefficient (CVE) and two spatial factors (S and α) are introduced to analyse the difference in the migration characteristics and damage degree of roof and floor strata under dynamic load impact. Then, the comprehensive weight is determined by principal component analysis and entropy weight method, and the failure evaluation model is established based on vulnerability index method; Finally, the risk grade zoning map of three stages is drawn by using ArcGIS technology. The research shows that the angle factor α can better describe the development direction of roof and floor fissures. The area factor S combined with the energy variation coefficient CVE can explain the development speed of fissures and the damage degree of coal and rock mass. According to the failure evaluation model, the corresponding risk degree of roof and floor in different stages can be comprehensively evaluated. The research results can be used as a reference for targeted disaster prevention and control in similar situations, such as large-area roof collapse and floor water inrush.

Evaluating the long-term sustainability of geothermal energy utilization from deep coal mines

Deep underground mines offer a great potential as low-enthalpy geothermal resource to be adopted in direct regional heating. In this paper, a parallel horizontal ground heat exchangers (pHGHE) system is introduced to utilize the geothermal resource in deep coal mines, however, the sustainability of the system in a long-run performance has not been well addressed in the previous study. This work presented a quantitative evaluation on the long-term sustainability of pHGHE system installed in backfilled stopes of deep coal mines. A novel numerical model is applied to characterize the heat transfer occurring between the horizontal pipes and backfill stopes. The proposed model was first verified to an analytical solution to determine the model reliability and accuracy. The validated numerical model was further applied to a typical underground backfilled stope of Anju coal mine in China. The results demonstrated that the maximum sustainable specific heat extraction rate must not exceed 40 W/m to maintain a 50-year exploitation period. A total thermal capacity of 17 GWh could be realized during each extraction cycle under the current conditions, which could provide heating to more than 170,000 m2 of residential building area. Accordingly, sensitivity analysis was performed to identify the key parameters influencing system sustainability. In addition, the effects of groundwater flow on the thermal interaction and long-term sustainability of the pHGHE systems were examined. Groundwater flow can be beneficial to the long-term sustainability of the system.This work confirms the feasibility and sustainability of geothermal resource utilization in backfill stopes of underground coal mines. The insights gained in this study can provide technical guidance for the design of geothermal systems in similar coal mines.

Strength of fabricated enclosed roadway support structure for TBM-excavated coal mine roadways: Experimental and numerical study

An increasing number of tunnel boring machines (TBMs) had been successfully applied in underground coal mines in China in recent years. While The tunnelling speed of TBM-excavated roadways has been difficult to exceed 600 m/month in deep-buried underground coal mines, which is still slow compared with the TBM tunneling speed in traffic and water conservancy tunnels. The lesson learnt from the engineering applications suggests that the rockbolting is the main factor that delays the TBM tunnelling operations. This paper proposed a fabricated enclosed roadway support structure (FERSS) for TBM-excavated roadways. The full-scale model tests under uniform and non-uniform loading conditions were conducted. The strain distribution and deformation behaviors of models were studied by using both conventional monitoring technologies and new emerged photogrammetric deformation monitoring system. The deformations of the models are negligible throughout almost the whole tests. Near the end of the tests, the displacement of models increased dramatically and then the failure of models occurred immediately. The bearing capacity of models dropped significantly from 6454.09 kN to 3481.21 kN when the lateral coefficient increased from 1 to 2. Moreover, the numerical models of FERSS were established by ABAQUS software and numerical tests were implemented under various conditions thereby obtaining further data which cannot be acquired from experimental tests. The results of numerical tests are in good agreement with those of the experimental tests and the influence factors of FERSS bearing capacity were analyzed.

The effect of job satisfaction regulating workload on miners’ unsafe state

Miners’ unsafe behavior is the main cause of accidents in coal mines, and unsafe state have an important influence on unsafe behavior among miners. To minimize accidents from the source of accident chain, we evaluated the impact of workload on miners’ unsafe state. It is important for coal enterprises to monitor miners’ unsafe state and to prevent unsafe accidents. Workload is divided into two dimensions: work time and work demand. Meanwhile, we introduced job satisfaction as a moderating variable. Through empirical research methods, first-line employees from two coal mines in China were enrolled in the questionnaire survey. Regression analysis was used to verify the impact of workload and its various dimensions, job satisfaction, and miners’ unsafe state. We found that workload, work time and work demand have significant positive effects on miners’ unsafe state. Job satisfaction plays a moderating effect in the relationship between workload and miners’ unsafe state. To some extent, a higher job satisfaction was associated with reduced workload, reduced occurrence of miners’ unsafe state and minimal incidences of unsafe accidents. On this basis, measures were proposed to improve miners’ unsafe state in terms of workload and job satisfaction. This study informs the establishment of effective intervention measures to monitor miners’ unsafe state and is also beneficial to the improvement of coal mine safety.

The Changing Tendency and Association Analysis of Intelligent Coal Mines in China: A Policy Text Mining Study

The intellectualization of coal mines provides core technical support for the high-quality development of the coal industry. Intelligent texts, especially intelligent policy documents, play an extremely important role in analyzing the trend of intelligent policies in coal mines. This paper collects more than 50 central and local intelligent coal mine policy texts from recent years. The method of text analysis is a tool used for text mining, and semantic networks are generated; it reflects that the policy mainly focuses on promoting large-scale equipment and platform integration, to promote the overall goal of safe, efficient, and intelligent development of coal mining. By analyzing the high-frequency words of the policy from 2016 to 2022, it reflects that the policy trend mainly goes through the following three stages: firstly, eliminate backward enterprises, encourage coal mine automation and mechanization; then, standardize the basic concept of coal mine intellectualization, carry out the transformation of coal mine intellectualization; and the third stage is to promote the application of key technologies of intellectualization, build intelligent demonstration coal mines and reach the acceptance stage, and promote the further development trend of coal mine intellectualization.

Surface pore characteristics of original coal dust produced in underground mining sites and their impact on the moisture content

In underground coal mines, the efficiency of water-based dust suppression technologies is heavily limited by the poor wettability of coal dust. To explore the effect reasons of the surface pore parameters of coal dust on its wettability, in this study, 18 original coal dust (OCD) samples produced in underground mining sites were collected from various underground coal mines in north China. The surface micropore (pore size <2 nm) and mesopore (2 nm < pore size <50 nm) characteristics of the OCD samples were measured with the nitrogen (N2) adsorption/desorption method. Subsequently, the correlations between the pore characteristics of the OCD samples and their moisture contents and initial contact angle (ICA) were established and discussed. The results demonstrate that the pore structures of the OCD samples are significantly developed, and the impermeable pores with one open end are the dominant pore types in the OCD. The micropore structure of the OCD samples considerably affects its moisture content, thus influencing its wettability. As the increase of micropore size, micropore volume, and specific surface area (SSA), the moisture content of the OCD samples linearly decreased (R2 =0.55), linearly increased (R2 =0.66), and linearly increased (R2 =0.65), respectively. The large capillary force caused by the developed SSA accounts for the significant moisture conservation property of the micropore structures, which improves the wettability of the OCD. The variation of the ICA with the pore parameters well verifies this conclusion.

Coal mine safety management index system and environmental risk model based on sustainable operation

With the increasing use of coal mine resources, some modern large coal mines have advanced and perfect safety equipment, reasonable personnel structure, and perfect rules and regulations, but why do major accidents start to occur? In addition to the complex geological conditions of China's coal mines, another important factor has attracted our attention, that is, the efficiency of coal mine safety management. This paper aims to study the coal mine safety management index system and environmental risk model based on sustainable operation. Based on the coal mine safety index of sustainable management, this paper proposes a mining algorithm for coal mine safety text classification and hazard source association rules. And this paper analyzes the safety management efficiency of the safety index system based on DEA and DEA-Malmquist. The analysis results prove that the evaluation values of coal mine safety management of the selected 20 coal mining enterprises from 2012 to 2017 were 0.602, 0.645, 0.570, 0.667, 0.771 and 0.705, respectively. The interval range of the data is between [0.55, 0.85], indicating that the evaluation level of safety management efficiency of Chinese coal mining enterprises is general and at a medium level.

Groundwater risk assessment of abandoned mines based on pressure-state-response—The example of an abandoned mine in southwest China

Due to the exhaustion of coal resources, resource integration, backward production capacity elimination, and other reasons, a large number of coal mines in China have been closed or are close to closing. When a mine is closed and the drainage stops, the water level of the mining area will rise rapidly, resulting in acid mine water (AMD), which carries pollutants through mining-induced fracture faults or poorly closed boreholes into groundwater or surface water, resulting in pollution and safety risks to the water environment. Therefore, it is essential to conduct environmental risk assessments of abandoned mine groundwater for mine environment governance and protection. On this basis and employing the pressure-state-response (PSR) risk evaluation system, and considering the abandoned Chuanbei mine in northern Sichuan province, China, mine water inflow, groundwater water chemistry, and the water environment pollution situation are analyzed, considering the AMD release and its environmental impact, while identifying the drivers and sources of pollution. Considering the mine drainage conditions, three first-level indices of environmental sensitivity response and 12 second-level indices of the redox state of aquifer permeability mine were determined, such as the aquifer thickness and relative location. The results show that the groundwater environmental risk in the study area is high, and the groundwater environmental risk index in the southeast is higher than that in the northwest. Heavy metals and other toxic and harmful substances carried by AMD are found to enter the surrounding waters, posing a direct threat to the health of downstream residents. These results can provide theoretical guidance for the comprehensive remediation of mine environments in this area, and also provide a reference for environmental risk assessment of other similar current mining areas.

Study on the Long-Distance Gas Pre-Drainage Technology in the Heading Face by Directional Long Borehole

Gas control in the heading face of a coal roadway is an important and difficult point in coal mining in China. On the basis of analyzing the disadvantages of high gas control cost and long drainage period in the existing mine heading face, a long-distance pre-drainage method of long-distance drilling is proposed to control the gas in the heading face so as to improve the tunneling speed. Applied to the engineering geological conditions of Changcun coal mine, the technology is studied in detail. First, a gas migration model considering permeability changing with time is established, and the model is put into the numerical simulation software to study the variation law of permeability and gas pressure under the conditions of single borehole and multi-borehole drainage. The results show that with the increase of drainage time, the permeability around the borehole increases gradually, the gas pressure decreases gradually, and the permeability at the borehole boundary increases the most, reaching 1.2 times the initial permeability. In the process of multi-borehole drainage, there will be mutual influence between boreholes, but with the increase of borehole spacing, the degree of this influence gradually decreases. Second, according to the results of numerical simulation, a reasonable gas drainage scheme is designed and applied in the field. The field application shows that the technology has a good gas drainage effect, the gas drainage concentration and flow are at a high level for a long time, the drilling cuttings quantity is always lower than the critical value, and the excavation length of roadway increases by more than 50 m per month. These results indicate that this technology is a promising method to realize the safe and rapid excavation of a mine coal roadway.

Sustainable high-intensity backfill coal mining method: feasibility assessment for ecologically fragile areas of Western China

ABSTRACT High-yield coal mining and ecological environment protection are the main aspects of the sustainable development of ecologically fragile mining areas in Western China. This paper briefly describes the development and current situation of solid filling coal mining in China, puts forward a green and sustainable filling coal mining method providing a maximum annual treatment capacity of waste gangue of 2 4 million tons, and analyzes the mechanical compaction properties of solid waste gangue, eolian sand, and loess in these areas. Taking a Coal Mine in Inner Mongolia, China, as an example, the effects of three key indices, namely mining height, face width, and backfill materials’ compaction ratio (BMCR) on the subsidence, horizontal deformation, horizontal movement, inclined deformation, and curvature of Quaternary aquiclude are studied. At a mining height of 3 m and BMCR = 80%, the maximum aquifer subsidence is below 168 mm. Based on the surface vegetation growth capacity analysis, the design principle of controlling the SBM key parameters by the ecological water level threshold is substantiated. The results show that the mining height and the BCMR of goaf are the key control indices affecting the stability of Quaternary aquifers, the evolution of ecological water level, and the production of surface vegetation. Combining the underground intelligent dry coal preparation and in-situ filling coal mining technology with a reasonable adjustment of the above parameters, the ecological environment protection can be realized for the whole life cycle of local coal seam mining in the areas under study.

Recycling and Reuse of Mine Tailings: A Review of Advancements and Their Implications

Mining is an important industry, accounting for 6.9% of global GDP. However, global development promotes accelerated demand, resulting in the accumulation of hazardous waste in land, sea, and air environments. It reached 7 billion tonnes of mine tailings generated yearly worldwide, and 19 billion solid tailings will be accumulated by 2025. Adding to this, the legacy of environmental damage from abandoned mines is worrying; there are around 10,000 abandoned mines in Canada, 50,000 in Australia, and 6000 in South Africa, as well as 9500 coal mines in China, reaching 15,000 by 2050. In this scenario, restoration techniques from mining tailings have become increasingly discussed among scholars due to their potential to offer benefits towards reducing tailing levels, thereby reducing environmental pressure for the correct management and adding value to previously discarded waste. This review paper explores the available literature on the main techniques of mining tailing recycling and reuse and discusses leading technologies, including the benefits and limitations, as well as emerging prospects. The findings of this review serve as a supporting reference for decision makers concerning the related sustainability issues associated with mining, mineral processing, and solid waste management.

Stability assessment of long gateroad pillar in ultra-thick coal seam: an extensive field and numerical study

Sustainability of an underground longwall operation is highly dependent on stability of the pillars during the panels extractions to ensure the continuous serviceability of gateroads. In Chinese underground longwall mining, the gateroads are typically driven as a single roadway with a “long gateroad pillar” which is different to a common practice where a gateroad consists of a number of pillars known as chain pillars. Such a unique practice has been proven to be more economical with maximum recovery while the safety remains at its highest level. In this study, based on the data obtained from Tongxin coal mine in China, the mechanical stability of the driven long gateroad pillar was investigated. The focus was on two nearby longwall top coal caving panels and their impacts on the mechanical behaviour of long gateroad pillar during the longwall retreat. To do so, initially an area of the gateroad was selected for the field instrumentation and data collection. These included vertical stress measurement and depth of damage assessment within the gateroad pillar and the longwall panel. Hence, the convergence level of gateroad was quantified to be used for the numerical modelling and assessing the performance of the designed long gateroad pillar based on the finite difference modelling technique using FLAC3D. Double-yield and strain-softening ubiquitous-joint constitutive models were used to simulate goaf material and strata, respectively. Finally, an extensive sensitivity analysis was conducted to compare the mechanical behaviour of a range of wide and narrow long gateroad pillars. It was concluded that the 50 m wide pillar is an ideal dimension for the future panels of Tongxin coal mine to achieve the maximum productivity and safety.Article highlightsThe validated numerical model was used to study on stability of “long gateroad pillar”.Premature yielding of the 38 m pillar would lead to severe geotechnical issues.Deep roof blasting of goaf edge or 50 m pillar can improve pillar conditions

Robust optimization for integrating preventative maintenance with coal production under demand uncertainty

We consider a coal mine producing a catalog of products through multiple pieces of equipment with variable production rates over a multi-period horizon, where each product faces random demand in each period. Each piece of equipment requires Preventative Maintenance (PM) with a given duration. We study a joint PM and production problem that adaptively determines the PM starting time and the production rates for the equipment to minimize the expected total cost. We formulate a multi-period stochastic optimization model that is challenging to solve due to the complexity of adjustable binary decisions. This motivates us to propose a two-phase approach based on robust optimization to solve the problem. Phase 1 determines the binary PM decisions using a target-oriented robust optimization approach. Fixing the PM decisions, Phase 2 adaptively determines the production rates using a linear decision rule. Numerical experiments suggest that our approach outperforms some existing approaches that handle adjustable binary decisions, and performs very close to the expected value given perfect information for varying problem instances. A case study using real data from a major coal mine in China suggests that implementing our approach can potentially yield cost savings in the long run over the status quo policy.

Study on comprehensive evaluation of environmental pollution treatment effect in coal mine subsidence area: taking Xinglongzhuang mining area of Yanzhou energy as an example.

In order to explore the effective evaluation method of environmental pollution treatment effect in China's coal mine subsidence areas, based on the literature review and analysis of current situation, combined with the reality of environmental pollution treatment (EPT) in China's coal mine subsidence areas, this paper selected four categories, including a total of 21 evaluation indicators, and drew lessons from the latest research results in relevant fields to construct the spatial niche suitability model of comprehensive evaluation of environmental pollution treatment effect in coal mine subsidence area. Taking the collapse area of Xinglongzhuang coal mine of Yanzhou energy as an example, the comprehensive evaluation and application of environmental pollution treatment effect in coal mine subsidence area were studied. It is found that the environmental pollution treatment effect of the mining area has increased from moderate pollution (level III) in 2012 to mild pollution (level I) in 2020 within 9years. The environmental pollution treatment effect has a rapid improvement relatively, but its growth rate has decreased year by year since 2016, and the environmental pollution indicator is still at a high level. Therefore, environmental pollution treatment in the subsidence area is still a long-term task of Dongtan coal mine. The research results of this paper provide an effective quantitative analysis method for the evaluation of environmental pollution treatment effect in coal mine subsidence area, which is conducive to the continuous improvement of environmental pollution treatment effect in mining area.

Application timing optimization of lignite-derived humic substances for three agricultural plant species and soil fertility.

Coal is mined for energy generation around the world, producing large amounts of waste and extensive disturbances to the environment. Post-mining lands with sandy soils to be reclaimed for agricultural uses are very challenging. The use of humic substances such as soil amendments has been discussed, although little information is available regarding application timing in the field. We conducted a field experiment over two consecutive growing seasons on a former coal mine in China, to investigate soil and vegetation response to a lignite-derived humic product called "nano humus" and to determine optimal application timing. Three economically valuable agricultural species, alfalfa (Medicago sativa L.), barley (Hordeum vulgare L.), and sea buckthorn (Hippophae rhamnoides L.), were used for this study. The benefits of the humic product on soil properties and plant growth under field conditions were expressed after 2 yr of application. A single application at the beginning of each growing season provided better results than splitting into two applications, with no impact of duration (months) between applications. A single application significantly increased soil available phosphorus by 63% and potassium by 96% relative to the control; it significantly enhanced total biomass of alfalfa by 749%, barley by 250%, and sea buckthorn by 147%. Our findings provided important practical implications for using a humic material as a soil amendment in coal mine reclamation, with potential applications in other agricultural and reclamation scenarios.

Relief Mechanism of Segmented Hole Reaming and Stress Distribution Characteristics of Drilling Holes in Deep Coal Mine

As the mining depth increases, in underground tunnels, caverns or pillar goaf, a rock burst is one of the important accidents that threaten mine safety. Drilling pressure relief becomes one of the main means of preventing rock bursts, which affect the mechanical properties and stability of the coal and rock in underground excavations. However, the surrounding rock of the roadway or the coal body is usually broken, and the pressure relief of the large-diameter borehole will affect its support. A segmented hole-reaming technology is proposed and applied in a coal mine in China. A pressure-relief mechanic model of segmented hole reaming was built. The coal sample had an elastic modulus of 0.35 GPa, the UCS and UTS were 17.4 MPa and 1.41 MPa, the Poisson ratio was 0.27, the cohesive force was 2.81 MPa, and the friction was 23.7°. The pressure relief range of the boreholes with different diameters, horizontal in situ stress coefficients, cohesive forces, and friction angles were analyzed. When the drill hole was increased from 120 mm to 200 mm, the pressure relief range was increased by 57.1%. The stress distribution of the staged reaming and pressure-relief drilling was also obtained. In the vertical direction, the vertical stress of the borehole first decreased and then was restored to the original rock stress area, and in the horizontal direction, it first increased and then was restored to the original rock stress area. A CMS1-6200 segmented drilling rig was used to construct the pressure relief hole. The weight of the drilled pulverized coal was monitored at different depths. The results showed that the amount of pulverized coal in all of the drilled holes was less than 3 kg/m, indicating that the effect of reducing the pressure relief is obvious. The study is of great significance to research the pressure relief range, mechanical characteristics and stress distribution of segmented hole reaming; it also provides insight into the rock burst prevention and the design of drilling in the mine site.

Internal Temperature Variation on Spontaneous Combustion of Coal Gangue Dumps under the Action of a Heat Pipe: Case Study on Yinying Coal Mine in China

Coal gangue spontaneous combustion is a serious catastrophe associated with mining activities. Generally, the areas of coal gangue spontaneous combustion are regions of tremendous heat accumulation. Mastering the regularity of deep temperature distribution and eliminating internal heat is an effective method to control spontaneous combustion. In this study, using self-developed heat pipe (HP) and intelligent cloud monitoring software, three sets of single pipe experiments were conducted in different temperature areas of the coal gangue dump in Yinying Coal Mine. A fitted model between shallow and deep temperatures was established using the least squares method to perform goodness-of-fit tests and significance analysis, and to analyze the internal temperature variation under the action of an HP. The results show that the quadratic model fits better and the regression is significant, and can be used as an empirical regression formula for the shallow temperature estimation of the deep temperature. The temperature was clearly suppressed by the HP, and the average cooling range reaches 21.44% within 700 h. However, the temperature of the control group without an HP continued to rise by 8%. In the three experimental groups, the effective control radius of the single HP was 3 m. The best cooling was achieved when the gangue depth was 1 to 4 m and the temperature was between 90 °C and 450 °C. The study shows that the HP has a great effect on thermal removal and inhibits spontaneous combustion of the gangue. In addition, this paper also provides a theoretical basis for the technology of HP treatment of spontaneous combustion gangue dumps.

Highly prestressed NPR cable coupling support technology and its application in the deep roadway

The stability control of deep roadways has always been a difficult problem related to the safe production of mines. This study took the -950 level substation roadway of the Wanfu Coal Mine in China as the project background to study a new support technology with negative Poisson’s ratio (NPR) cables as the core. Firstly, based on the mechanical properties of the NPR cable with a large constant resistance, a high elongation, and uniform full-length energy absorption, the highly prestressed NPR cable coupling support technology was proposed. Its mechanism was revealed, i.e., by strengthening the surrounding rock with a high prestress and releasing its deformation energy with a large constant resistance and a large deformation, the “stress compensation” effect of the NPR cables can be brought into full play so that coupling of the “support-surrounding rock” can be achieved. Secondly, the numerical model of the second-generation NPR cable was established by FLAC3D, which can realise the constant resistance and large deformation of the NPR cable and achieve the sequential breaking of the NPR steel strands during the deformation of the NPR cable. Numerical tensile tests verified its effectiveness. Finally, the NPR cable support scheme was designed through theoretical calculations and numerical simulations. After field application, the roadway deformation was constrained within 80 mm, effectively preventing engineering failures. This study may serve as guidance for similar projects.