External Dump Research Articles

Freeze–Thaw Damage Characteristics of Soil–Rock Mixtures in Open-Pit Coal Mines and Stability Analysis of Slopes in Discharge Sites Based on Partial Flow Code

More than 80% of open-pit coal mines in China are located in northern regions, and the mechanical properties and stability of loose soil–rock mixtures in waste disposal sites are significantly affected by freeze–thaw effects. This article takes the external dumping site of the Baorixile open-pit coal mine in the northern high-altitude region of the Inner Mongolia Autonomous Region as the research object. Through on-site investigation and sampling, indoor triaxial tests (confining pressures of 100 KPa, 200 KPa, and 300 Kpa; moisture contents of 18%, 21%, and 24%), numerical simulation, and other methods, the mechanical properties of soil–rock mixtures in the dumping site under different freeze–thaw cycle conditions were tested to reveal the specific influence of the number of freeze–thaw cycles on the mechanical properties of soil–rock mixtures. Using the discrete element software PFC, the microstructural changes in soil–rock mixtures formed by freeze–thaw cycles were studied, and the deformation mechanism and slip mode of loose slopes in waste disposal sites under different freeze–thaw cycle conditions were explored. The relationship between the number of freeze–thaw cycles and slope stability was clarified. The following conclusions can be drawn: the compressive strength of soil–rock mixtures decreases as a quadratic function with increasing freeze–thaw cycles; as the number of freeze–thaw cycles increases, the internal cracks of the soil–rock mixture model increase exponentially; and as the number of freeze–thaw cycles increases, the stability of the slope in the dumping site decreases significantly, and this stability also decreases with an increase in dumping height.

Block method of mining quarry fields as a tool to reduce environmental impact in conditions of intensification of production

Relevance. The intensification of open-pit mining in the coal basins of the Russian Federation is accompanied by an increase in negative impact on the environment. Directly in Kuzbass, the environment is exposed to the impact of the coal industry, especially when conducting open-pit mining using deep mining systems, with external dumping, which is accompanied by the withdrawal of a large amount of undisturbed land. The block method of mining quarry fields, well known in mining, has been rarely implemented in existing and planned quarry fields. The general line of its application is the lack of a unified approach to the design of block parameters, including environmental and economic assessment of the impact of this technological solution on the environment. Aim. Reduce environmental payments of mining enterprises with justified parameters of blocks for the development of quarry fields of promising inclined and steeply dipping coal deposits. Methods. Systematic generalization of the actual situation of mining operations in open-pit mines using the block method of mining quarry fields, the method of options and technical and economic modeling using spreadsheets. Results and conclusions. The authors have proposed the ecological and economic criteria for assessing the application of the block method of quarry field development. This allows us to study the patterns of change in environmental indicators. Using the example of the Krasnobrodskoe open-pit mine, the costs of environmental payments for the use of land resources, emissions and dusting are calculated for two options different from the design documentation. Based on the calculation results, the authors proved the efficiency of applying the block procedure for developing promising coal deposits, allowing us to reduce the costs for environmental impact by 22.5 and 63%, respectively, when changing the length of the initial block along the bottom from 2.2 to 1.4 km. From which it follows that the combined ecological and economic indicators allow us to fully assess the feasibility of applying the method for calculating block parameters, which is generally reflected in reduction in the costs for negative impact on the environment.

Study on the sliding mechanism of the external dump slope in the open-pit mine with wind-blown sand base

Wind-blow sand (WBS) is widely distributed in the “Desert Gobi” region. This study is aimed at exploring the mechanism of how different thicknesses of the WBS layer influence the slope movement of external dumps in open-pit mines. To achieve this aim, the slope of the external dump in the open-pit mining area of Panel 3 in Daliuta Coal Mine was taken as the research object. First, similar simulation experiments were performed for investigating the failure modes and deformation characteristics of the external dump slopes under three geo-morphological conditions: loess base, 10-m-thick WBS base, and 20-m-thick WBS base, respectively. The following results were obtained from the experiments. For the slope with a loess base, its failure is mainly caused by circular sliding from the dump to the interior of the loess layer. For the slope with a 10-m-thick WBS base, the sliding mode involves circular sliding from the dump area to the interior of the WBS layer, linear sliding along the WBS base, and shearing along the foot of the dump area. For the slope with a 20-m-thick WBS base, the sliding mode is circular sliding from the dump area to the interior of the WBS layer. Besides, the sliding area of the dump slope expands as the WBS layer thickens. Furthermore, the results of similar simulation experiments were verified by the finite difference software FLAC3D based on the strength reduction method, and an equation of relationship between the safety factor of the dump slope with a WBS base and the thickness of the WBS layer was derived.

Soil and ecological assessment of the technogenically disturbed landscape in the area of a coal mine dump

Study of the soil‐ecological state of technogenic landscapes of Kuzbass through the example of coal mine dumps.Soil samples were taken in places with disturbed landscapes due to the action of the coal industry, namely the external dump on the site of the coal mine in the area of the village of Zarinskoye, Belovsky district, Kemerovo region in the south‐east of Western Siberia. The indicators were determined in accordance with GOST standards.Diagnostics of the surface of the coal mine dump were carried out. The main physical and chemical indicators were determined, according to which the possibility of soil formation and biological reclamation was assessed. In analyzing chemical composition, the following indicators were determined: aqueous pH, hydrolytic acidity, total alkalinity, dry residue, ash content, humus content and ion content (Cl–, SO42–, HCO3–, Ca2, Mg2+, Al3+). Physical indicators of the degree of suitability of soils for reclamation, such as hygroscopic moisture, soil moisture, soil density and soil porosity, were also studied.The results obtained allow us to characterise the technogenically disturbed areas in terms of physical and chemical properties as being limitedly favourable for plant growth, which can be used for biological reclamation following agrotechnical activity.

Energy Extraction System for the Superconductive Solenoid with Current 5100 A and Stored Energy 22 MJ

At the FAIR (Facility for Antiproton and Ion Research, Darmstadt, Germany) accelerator complex under construction, one of the key experiments is the PANDA experiment. The main field of the PANDA spectrometer is provided by a superconducting solenoid. The energy of the magnetic field stored in a superconducting solenoid reaches 22 MJ at an operating current of 5100 A. In the case of the transition of the superconducting cable used for the solenoid winding into a resistive state, the safe extraction of stored energy is required to protect the magnet. The energy extraction system proposed by the authors provides energy dissipation inside the external dump resistor, and not in the section of the superconducting cable that has passed into resistive state, while preventing its damage. The most critical elements of the energy extraction system are the current breaker, with the help of which the dump resistor is introduced into the power circuit of the superconducting solenoid, and the dump resistor itself. A modernized three-phase circuit breaker was chosen as current breaker. A unique design of the energy extraction system including dump resistor with a low parasitic inductance has been developed.

Study on the control effect of local basement replacement on the stability of dump.

This study focuses on effectively controlling landslides at the boundary of a soft rock open-pit dump while ensuring safe increases in the dump's capacity and optimal utilization of external dump sites. To achieve this, the adoption of a local filling method for the dump base is proposed. By leveraging the concepts of limit equilibrium theory and equivalent shear strength parameters, the mathematical expression of the slope stability coefficient in the Morgenstern-Price method is derived and improved. This improved method is then applied to a real engineering example to determine the optimal basement replacement rate required to maintain slope stability. The findings reveal that the local filling of the base is well-suited for slopes susceptible to potential landslides associated with cutting layers, bedding layers, and swelling. For practical ease, it is advisable to choose the lowest step in the dump's slope for construction convenience. As the local replacement rate of the base increases, the slope's stability coefficient gradually improves, with the K-Fs ratio showing a prominent role in this process. Additionally, numerical simulation methods are employed to elucidate the mechanism of the dump's landslide following local basement replacement, thereby providing comprehensive evidence of the engineering applicability of this method. The research results demonstrate a promising practical application prospect for effectively controlling the stability of soft base dump slopes.

Radiological characterization for the disposal of a decommissioned LHC external beam dump at CERN

During the last Long Shutdown, a scheduled maintenance period between physics runs, the two Large Hadron Collider (LHC) beam dumps were replaced with upgraded spares modules. It was then decided to conduct an in-house autopsy and a post-irradiation examination of the removed dumps to extract information essential for the 3rd LHC physics run and to aid the design of new generations of beam dumps able to cope with future upgrades of the LHC. The need for a postmortem analysis of the dump cores opened the opportunity to combine the autopsy with processes required for the disposal of the dumps as radioactive waste at a dedicated disposal facility in France. This had a direct impact in terms of overall optimization of the interventions (postmortem analysis and prepackaging) to be performed on the dump as well as in terms of minimizing of the radiological risk (ALARA), by reducing the exposure of the personnel by combining two interventions in one. The characterization of the dump as radioactive waste was performed by means of state-of-the-art Monte Carlo and analytical techniques verified experimentally via a series of dedicated radiochemical (using liquid scintillation) analyses, conducted in-house and in external specialized laboratories. Based on these results, the dumps will be disposed of as intermediate–medium-level (FMA-VC) waste at the ANDRA CSA repository in France.

ТЕХНІКО-ЕКОНОМІЧНЕ ОБҐРУНТУВАННЯ ДОЦІЛЬНОСТІ ФОРМУВАННЯ ТИМЧАСОВИХ ВНУТРІШНІХ ВІДВАЛІВ НА ЗАЛІЗОРУДНИХ КАР’ЄРАХ

Purpose. To determine the effectiveness of internal dump formation during the temporary placement of overburden rocks in the conditions of the Poltavsky MPP pit. Methods. During the research, the following methods were used: analysis and systematization to evaluate the initial information regarding internal dump formation in iron ore quarries; analytical to establish a rational way of placing the internal dump in the residual space of the pit; graphic-analytical to determine the geometric parameters of dumps; technical and economic analysis to compare the efficiency of technological schemes of internal and external dump formation. Results. The proposed technological solution for dumping a temporary internal dump with a volume of 4 million m3 in the residual space of the Poltavsky MPP pit, with its subsequent transfer to an external dump after 6 years. The technical and economic efficiency of the proposed technological scheme of layer-by-layer dumping of rock overburden in the northern part of the Horishno-Plavnensky deposit, where the slopes of the pit have been temporarily inactive for a long time, has been proven. Scientific novelty. The influence of the rock haulage distance from the quarry to the dump on the productivity of dump trucks and their required number when haulage a given volume of overburden rocks was determined. It was established that when the haulage distance is increased by 3 times from 1 to 3 km, the productivity of the CAT 785 C dump truck is reduced by two times from 4.8 to 2.4 thousand t/m, which leads to the need to increase the dump trucks number from 4 to 9. Practical significance. It was determined that the formation of a temporary internal dump allows to achieve cost savings in the amount of UAH 281.3 million in the first year of implementation of the proposed solutions, and additional costs for replacing rocks from the internal dump to the external after six years will amount to UAH 365.4 million. It is proven that, taking into account the discounting factor, this amount in the form of current costs will amount to UAH 187.5 million, and the total economic effect of the proposed solutions will amount to UAH 68.27 million.

Growth and Timber Quality of European Larch Planted in Areas Reclaimed After Coal Mining in Central Poland

Understanding the impact of reclamation measures on the quality of timber produced in post-mining areas is crucial for the proper establishment of future forest cultures on such sites. We studied European larch trees (Larix decidua Mill.) grown since 1981 on the external dump of a brown coal mine in Bełchatów (Central Poland). In particular, the effects of stand admixture and the intensity of mineral fertilization, applied in the initial phase of tree growth, on the increments and quality of larch wood were evaluated. Total tree height and stem diameter of 4-meter sections were measured. Qualitative timber classification took into account the share of wood defects, which excluded the timber from a higher quality-dimensional class. Larch trees grown in a monoculture had a better quality of wood compared to larch grown mixed with other species. Fertilization, applied in the initial afforestation period, had only a limited effect on the growth of larch trees. Curvature and knots determined timber quality most significantly. While knots had a decisive importance in larch growing in the monoculture stands, curvature determined wood quality in the admixed larch stands.

A ghost village. Spatial cleansing in Wigancice-Żytawskie in the landscape of the Turów mining and power complex, Lower Silesia

The article presents an excerpt of some empirical research undertaken by an anthropologist on local ways of experiencing the operation of the Turów mining and energy complex in the Bogatynia commune in Lower Silesia within the context of an just energy transition. The aim of the reflections contained in this research sample is to present Wigancice Żytawskie – a town once located in the Bogatynia commune in the Zgorzelec poviat as a ghost village that functions in the minds of its former inhabitants and the generations that have followed as a lost and demolished yet remembered place. Wigancice was demolished by the end of the 2oth century due to the expansion of the lignite open pit in the Turów mine and the creation of an external dump, which was considered a threat to the village and its inhabitants. The text draws from Michael Herzfeld’s understanding of the term ‘spatial cleansing’, which in the case of Wigancice was closely related to the activity of the Turów mining and energy complex. Adopting energy anthropology as a theoretical framework, the anthropologist shows the course and effects of this process in terms of human/non-human assemblage, at the same time asking questions about the special characteristics of human life in areas rich in energy resources and ways of experiencing a landscape changing under the influence of industrialization processes. The author also attempts to recover the stories of the inhabitants of the ghost village, whose fates intertwined with the functioning of the Turów mine and were marked by the experience of loss, dispossession and relocation in the process of industrial transformations in the region.

Физико-химический анализ почвенного покрова техногенно нарушенных территорий Кузбасса

As a result of coal mining, the natural landscapes of the Kemerovo region are involved in the process of global technogenic transformation. As a result of open-pit coal mining, catastrophic changes occur in ecosystems, which are accompanied by the destruction of the litho logical basis, degradation, transformation and displacement of huge tracts of soil cover. The aim is to study agro physical, agrochemical, sanitary and epidemiological indicators of soil samples of technogenically disturbed territories of Kuzbass. Objects of research. Samples of the surface layer of the external rock dump of LLC "Korchakolsky Section" the dump rock and the surface layer of the nearby territory, of the forest belt of the processing plant of LLC "JV "Barzassky Partnership" and the Taldinsky coal mine. The samples of undisturbed lands selected near the museum-reserve "Tomskaya Pisanitsa" were used as a reference. Methods. Agro physical (hygroscopic humidity, wilting humidity, soil density, soil porosity) and agrochemical (water and salt pH, total alkalinity, hydrolytic acidity, sum of exchange bases, dry residue, content of Cl–, SO₄2–, HCO3–, NO3–, Ca2+,Mg2+, Al) analysis of selected soil samples, including the content of pollutants of anthropogenic origin. The sanitary and epidemiological indicators of the samples were studied. Methods of chemical and instrumental analysis (electrochemical, chromatographic, molecular absorption spectroscopy) were used for research. Results. The analysis of the degree of technogenic disturbance of the studied landscapes is carried out. Samples of LLC JV "Barzassky Partnership" can be attributed to sandy loam soils of a slightly alkaline type. The nickel content exceeded the MPC by 1.26 times; the BGCP index by 25.25 times. Samples of the Korchakolsky section are attributed to sandy soils of a slightly alkaline type. The content of mobile phosphorus exceeded the MPC by 3.40 times, zinc by 1.1 times, nickel by 1.22 times, arsenic by 2.15 times; the BGCP index by 29.41 times. The samples of JSC Taldinsky Coal Mine are classified as sandy loam with a neutral reaction. The content of the mobile form of phosphorus exceeded the MPC by 5.22 times; nickel by 1.5 times; arsenic by 1.67 times. The samples of the reference soil are attributed to clay soils of a slightly alkaline type. The content of the mobile form of phosphorus exceeded the MPC by 2.27 times; nickel by 1.17 times, the BGCP index by 62.62 times. Conclusions. Based on the analysis of the composition of dump and quarry landscapes of technogenically disturbed territories of the Kemerovo region, detoxification of soils with the use of biological reclamation is recommended.

Studying the Coal Pit Side Stability Loaded by an External Dump upon Strength Criteria

Studying the Coal Pit Side Stability Loaded by an External Dump upon Strength Criteria

Stability analysis of mine overburden dump and improvement by soil nailing

The conventional method for carrying out stability analysis of dump involving Limit Equilibrium Method (LEM), when compared with the strength reduction method (SRM) using Finite Element Method (FEM) approach, resulted in overprediction of the factor of safety (FoS). In the present study, slope stability analysis of external overburden dump in Sonepur Bazari opencast mine has been carried out. Morgenstern Price method using constant inter-slice force function conducts the analysis of LEM using Geo-studio Slope/w, and the FEM analysis is carried out using the PLAXIS 2D 2016. The study is carried out to assess the effect of the dump’s friction angle, slope angle, height, and bench configuration. Further, the analysis considering the soil nailing is also conducted by optimizing the number of nails, the distance between nails, length of the nails, nail inclination angle. The stability analysis found that the dump is in a critical state (FoS = 0.92) with a circular failure surface. The optimum slope angle is found to be 30˚. It is observed that LEM cannot detect the increased localized stress concentration at the bench edge. Reinforcement of the dump using the soil nailing technique has affected the dump stability substantially, with an increase of 11% in the FoS; however, the effect of nail orientation on dump stability was less pronounced. Further bench provision to the dump slope increases the FoS by 27%, 21% and 19%, considering the total height of 60 m, 80 m and 100 m, respectively.

ФОРМИРОВАНИЕ ЗОН НЕУСТОЙЧИВОСТИ БОРТА УГОЛЬНОГО РАЗРЕЗА ПОД ДЕЙСТВИЕМ РАСПРЕДЕЛЕННОЙ НАГРУЗКИ

An analysis of previously performed studies has shown that the coefficient of stability of the working sides of quarries and coal mines is considered constant along the open surface of the side or along its height. The method of limiting equilibrium for the entire sliding surface allows us to obtain an average value of the coefficient. The stress-strain state of the instrument array of the working side of a coal mine under the action of a distributed load from an external rock dump is investigated. The use of the finite element method and modern geomechanics software packages made it possible to obtain indicators of the stressstrain state and stability of the board at any point of the instrument array. The regularity of the change in the coefficient of the stability margin of the side according to its height is established. The lowest numerical value of the coefficient is characterized by the lower ledges of the side, the deformation of which leads to the weakening of the upper ledges and the possible manifestation of landslides.

Study on the Shape Optimization of Composite Slope at the End of Irregular Boundary Open-Pit Mine

In order to optimize the shape of the compound slope at the end of the open-pit mine under the condition of non-irregular boundary, the compound slope composed of the stope end and the inner dump in the south of the open-pit mine in Pingshuo is studied. Due to the impact of land acquisition, the space of external dump is seriously insufficient, and with the development and change of mining engineering and the influence of geological structure, the problem of compound form optimization and the release and utilization of internal drain space in the south side is generated. Through field investigation and theoretical analysis and numerical analysis method, on the basis of investigating the ore party production status, to establish a 3 d geological model, select two battery profile typical position, using rigid body limit equilibrium method from the perspective of 2 d, in the full study south help shrink battery limit compound stope side slope and mine safety distance, flat width, and the direction of dump active line and the relationship between the stability design of multiple slope configuration scheme, through the various methods of slope stability, enforceability and comparing some important parameters such as displacement capacity, ultimately determine the technology feasible economic and reasonable boundary zone composite slope space form. Based on the above research results, FLAC3D software was used to study the stress-strain relationship inside the slope, revealing the deformation and failure mechanism and stability of the composite slope in the south bound area. The results show that the landslide mode and stability of the composite slope in the south bound area of pingshuoAndaobao open-pit coal mine are mainly controlled by the safe distance between stope and dump and the weak layer of 11 coal floor. According to the design, the economic and reasonable parameters of the composite slope in the south slope shrinkage boundary area are as follows: the safe distance between the stope end side and the dump site is 50m, the width of the dump flat plate is 60m, and the working line Angle of the dump line with the abandonment height of 255m is 125°, the total discard space was95,934,100 m3.

Experimental Study on Impermeability Law of Aquiclude Reconstructed by Mudstone of External Dump in Arid Zone

In order to achieve the goal of ecological restoration, plant irrigation, and water retention in the external dump of open-pit coal mine in the arid desert area, it is proposed to use the mudstone in the stripped material to reconstruct the surface aquiclude and improve the water holding capacity of the topsoil. By taking the Hongshaquan Open-Pit Coal Mine as the study object, the red mudstone of mining level +650 was selected as the topsoil aquiclude material through the geological survey. XRD diffraction experiments are used to determine the composition of red mudstone including kaolinite mineral, quartz, potash feldspar, albite, and illite. The moisture content of the red mudstone is 4.16% as measured by the indoor drying experiment. And the particle size of 0.5 mm, 1 mm, and 2 mm and the thickness of 5 cm, 10 cm, and 20 cm rock samples were selected to conduct the indoor soil column experiment. Three indicators of initial infiltration rate, stable infiltration rate, and average infiltration rate were obtained according to the analysis and calculation of the water column drop rate, wet peak drop rate, and cumulative infiltration rate so that the permeability law and coefficient of each group of tests can be known. The finite element transient analysis theory and numerical simulation method were adopted to verify the results of physical experiments. The research results show that +650 level red mudstone has a strong antiseepage ability, and the smaller the particle size, the better the antiseepage performance. For 0.5 mm and 2 mm particle sizes, as the paving height increases, the water-proof effect is better. The laying height of 1 mm particle size has no obvious influence on the water barrier effect. The physical simulation was confirmed to have the same result trend as the numerical simulation, both of which are quadratic functions with the error within a reasonable range.

Study of Mechanical properties of Sand extracted from Overburden of WCL Mines – the Effective Sustainable Sand Solution

Ecological environment concerns are being raised against exploitation of natural resources. The lack of consensus are mostly related to preserve soil beds from erosion and the fact of having natural sand as a filter media for ground water. For a period of time, coal industry in India is facing shortage of river sand due to new mining laws and its increasing demand in infrastructure expansion. The present study concentrates on study of extraction of sand from the overburdens of opencast mines of Coal fields and its feasibility as a fine aggregate in concrete. The surcharge soil spread over in mines needs to be removed for separation of coal to an external dump till ample space is produced for back filling by obtaining of land nearby coal carrying area. Moreover surcharge waste needs to be managed at the time of closure of mine for land acquisition. In present project study of physical properties of extracted sand from overburden and natural sand from river bed is compared and effort is made to utilize the waste generated in tones into sustainable sand solution.

Yeasts in the nests of the leaf-cutter ant Acromyrmex balzani in a Savanna biome: exploitation of community and metabolic diversity.

The leaf-cutter ant Acromyrmex balzani is responsible for causing important losses in reforestation areas, crops, and pastures, and is frequently found in the Brazilian savanna (Cerrado). So far, there is no information regarding the yeast communities that occur in their nests. Here, we evaluated the diversity, composition, and structure of yeast communities in both fungus gardens (FG) and external refuse dump (RD) of this ant species (Palmas, Tocantins, northern Brazil). A total of 720 yeasts were isolated, comprising 52 species distributed in 29 genera. The RDs have significantly richer and more diverse yeast communities than the fungus gardens, regardless of the season and the level of preservation in the area. The isolates produced a wide range of carbon polymer-degrading enzymes and were able to assimilate carbon-sources present in plant materials. We observed a different proportion of enzyme-producers and carbon-assimilation found in external refuse dump and fungus gardens from preserved and disturbed areas, suggesting that this interaction may vary depending on the environmental conditions. A. balzani nests in the savanna biome are a hotspot of yeast species with ecological, clinical, and biotechnological implications.

Detection and Protection Against Quench/Local Thermal Runaway for a 30 T Cryogen-Free Magnet

The upgrade to 30 T of the existing 25 T cryogen-free magnet (25 T CSM) at the High Field Laboratory for Superconducting Materials, Tohoku Univ., will consist in replacing the existing High Temperature Superconductor insert made of Bi-2223 by one wound using REBCO tape. The new insert is designed to produce 16 T instead of 11 T. In order to have good dynamics and allow sweeping mode experiment, the insert will be conventionally isolated, as it was the case for the previous Bi-2223 version. In previous work we modelled thermal runaway phenomenon and showed that a sensitive dissipative voltage detection technique can give sufficient warning to protect an HTS coil using external dump resistor even in the case of sharp local critical current drop. For the 30 T insert, the conductor will consist of a two tape bundle so as to reduce the chance of such sharp Ic drop due to tape performances inhomogeneities or local damage. We simulate the quench dynamics in the LTS outsert coupled with the HTS insert to demonstrate that the existing detection/protection system of the 25 T CSM can be re-used and determine the current dumping dynamics. We then use our thermal runaway modelling tool to study the behavior of the future 16 T REBCO insert in case of local sharp defect and determine realistic detection threshold for its safe protection.

Determination of economically viable option of liquidation the consequences of external dump deformation

The safety factors for different variants of operation development were obtained, on the basis of which the technical and economic indicators were established and the most expedient way of restoration of dump operations in conditions of the formed landslide was chosen. The solutions were proposed for the external dump No 2 of the Central Ore Mining and Processing Enterprise (COMPE), that allow to continue its future operation. When working in the conditions of the formed landslide, three variants of the further dump operation are modeled: the first one - with landslide removal and unloading of the upper dump horizons, the second one - without landslide removal and involvement of disturbed lands in land allotment, the third one - with the landslide loading. Based on the built sections of the dump and defined physical and mechanical properties, the stability factors were obtained for different options of the operation development, which made it possible to determine the appropriate option to eliminate the effects of the dump slide deformations. As a result of the calculations, the cost flows for each of the proposed options of the formation of the end contour of the dump No 2 are determined.