Internal Dumps Research Articles

Justification for mining overburden without the use of conveyor transport at the Pivnichnyi open pit of the Pokrovskyi mining and processing enterprise

The current state of mining operations in the open pits of the Pokrovsky mining and processing enterprise has been analyzed, where the shortcomings of existing technological schemes have been identified. Technical and organizational criteria have been identified that must be met by technological schemes for overburden and mining operations for the open-pits of the Pokrovsky mining and processing enterprise, where conveyor transport is used. Five technological schemes have been proposed for the Pivnichnyi open-pit, which provide for the reallocation of the height of overburden benches and the movement of overburden only to internal dumps without the use of conveyors. The dependences of the height of the internal dump and its resulting angle of slope on the re-excavation factor for the proposed technological schemes were obtained. The indicators have been calculated at which the most operating efficiency of mining and transport equipment for the Pivnichnyi open-pit of the Pokrovsky mining and processing enterprise (MPE) will be achieved and complete extraction of overburden rocks with cross movement to the internal dump without the use of conveyor transport will be ensured, and the production capacity of the quarry is also given according to the demand for ore.

Reassessment of the Stability Conditions in the Lignite Open Pits of Oltenia (Romania) in Relation to the New Local Seismic Context as an Imperative for Sustainable Mining

Responsible mining considers the three pillars of sustainability, namely the environment, the economy and social welfare. As a result, exploitation of deposits of useful mineral substances, as an economic activity, must be carried out taking into account several requirements, among which is the generation of a reduced impact on the environment and local communities. Sliding of open pits and waste dumps slopes represents a major risk, which endangers workers and machinery, as well as the components of the natural and built environment in the influenced area. In order to avoid such phenomena and their consequences, it is imperative to analyze the stability conditions whenever their possible triggering factors appear (such as earthquakes). Between February and March of 2023, the region of Oltenia (south-west Romania) was affected by intense seismic activity, out of normal patterns. Considering this series of seismic events, in this paper we aimed at reevaluating the stability conditions of the slopes of the working fronts and of the internal dumps in the lignite open pits located in the region in this new context. Research focused on three lignite open pits, namely Peșteana North (Rovinari mining perimeter), Jilț North (Jilț mining perimeter), Berbești–Alunu (Berbești mining perimeter). After describing the general geology and tectonics of the areas under study, the seismic episode that affected the region at the beginning of 2023 (which in fact extended until November) is highlighted, with increased attention given to the earthquakes of 13 and 14 February 2023, with a local magnitude ML ≥ 5. The most important part of the study is represented by the stability analyses, carried out for normal conditions (considering the characteristics of the rocks at natural humidity and in the absence of the influence of external factors) and under seismic conditions, characterized by a peak ground acceleration equal to the maximum acceleration considered for the location area of the mining perimeters taken into study. The results of the study showed that, for most of the analyzed situations, a renewal of the technical exploitation documentation is required, which, taking into account the results of this study, must adopt new geometries of the excavation and deposition fronts, so that the objectives in terms of operational and workplace safety imposed by legislation are respected.

Study of rock massif strains when creating an internal dump in the zone of transition from open pit to underground mining

The work explores technologies for transitioning from open pit to underground mining of minerals, focusing on stress-strain analysis of the rock mass during this process. It enhances methods for studying these stress-strain states, particularly in the context of combined technologies for iron ore extraction. The study proposes environmentally safe techniques for extracting magnetite quartzite, involving the use of internal dumps in open pits to dispose of mining waste. It develops and suggests efficient design schemes for managing stress-strain states during the transition and proposes using protective barrier pillars formed from artificial consolidating backfill for subsequent underground mining. Strains in these barrier pillars and the rock mass are calculated for various scenarios of waste filling. The study, exemplified by the Kryvyi Rih iron ore basin, demonstrates the environmental benefits of using abandoned open pits for waste disposal and underscores the economic advantage of these technologies. This innovative approach plays a crucial role in preserving the valuable Ukrainian agricultural chernozem. By implementing this method, there is a significant reduction in the amount of land required for agricultural use and minimizing environmental impact.

FEATURES OF GEOMORPHOLOGY STRUCTURE OF THE GNIVAN GRANITE QUARRY (VINNYTSIA REGION)

The Hnivan granite quarry is located in Vinnytsia district of Vinnytsia region. Geomorphologically, territory belongs to the western edge of the Dnieper Upland. Geostructurally, the quarry is located on the western edge of the Ukrainian shield, within the Podilsky megablock. Since the beginning of development, 7 rock horizons have been fully opened. As of today, the 8th horizon is being developed, and the development of the 9th horizon is planned in the future. The Hnivan quarry is a deep polygonal trapezoidal quarry in plan with many steps in profile. Morphometric characteristics of the Hnivan quarry and dump complex: the maximum length from north to south (including dumps of overburden strata) is 1 800 m; the maximum length of the quarry pit from north to south is 1 400 m, the maximum width from west to east is 900 m. The absolute heights within the mining are 230–255 m, the absolute height of the mine floor is 130 m. The depth of the quarry pit is currently about 105 m. The bottom is 97 meters below the level of the Southern Buh river. Quarry landforms are divided into produced relief forms, caused by anthropogenic denudation and bulked relief forms, created as a result of anthropogenic accumulation. The produced relief of the Hnivan quarry is represented by the bottom and walls. The bottom has a complex geometric shape of an elongated polygon from north to south. It consists of the bottom of the seventh developed horizon and the eighth horizon, where mining operations are carried out. Between these horizons, there is a step 15 m high. The surface of the bottom is flat, there are no internal dumps. The walls of the quarry are characterized by a multi-step shape in profile. They are approximately the same in height, steepness and nature of the processes. The structure of the walls in the upper parts, which are represented by ledges of overburden horizons, is different. The ancient steps of the mine walls are significantly disturbed by weathering, water erosion and gravitational processes. The produced relief forms of the quarry are represented by overburden dumps and processing plant dumps. All of them are located outside the quarry and are external dumps. Dumps of overburden strata are recultivated - stable and artificially forested. This example of carrying out reclamation works of a part of the quarry and dump complex can be a model for the improvement of anthropogenically disturbed territories. Key words: granite quarries; geomorphological structure; excavated relief; heaped relief; Hnivan.

Fuzzy cognitive-based goal programming for waste rock management with in-pit dumping priority: Towards sustainable mining

Internal (in-pit) dumping is a sustainable waste rock management approach that can mitigate the potential adverse environmental, social, and economic impacts of conventional off-site dumping. In this study, a fuzzy-weighted multi-objective programming model was developed to determine the best feasible waste scheduling strategy. Minimizing waste rock hauling cost, social complaints, environmental penalties, and operational issues are the main objectives of the model. A fuzzy cognitive map was incorporated into the model to analyze the objectives based on their causal relationships. Various weighting scenarios were used to assess the influence of prioritization of objectives on the waste scheduling results. The model was applied to a surface mine containing several lens-shaped limestone deposits. It was found that entirely dumping waste rock in the internal dumps (D1-D3) could lead to the lowest social, environmental, and operational issues under the causal weights of 0.272, 0.267, 0.230, and 0.230 for the social, environmental, economic, and operational objectives, respectively. However, the distances between the extraction sites and internal dumps are large compared to external dumps (K1 and K2), and dumping in the external dumps resulted in significantly more social complaints and environmental effects. A sensitivity analysis on the capacity of the preferred internal dump (D1) indicated that if its capacity is inadequate to accommodate all wastes, the less preferable internal dumps would be used, followed by external dumps.

Determining the Safe Distance for Mining Equipment Operation When Forming an Internal Dump in a Deep Open Pit

In the surface mining of mineral deposits, land resources suitable for agricultural purposes are inappropriately spent in large volumes. When mining deep open pits, overburden rocks are mainly transported to the surface. The optimal solution for reducing the area of disturbed lands is the placement of overburden rocks in internal dumps in the open pit. This is especially suitable when mining a mineral deposit with several open pits where at least one of them is depleted. Therefore, it is important to assess the feasibility of building an internal dump, based on the stability parameters of its slopes and the safe distance for placing mining equipment within its boundaries, which was the focus of this research. Numerical modeling with Slide 5.0 software was used to determine the stability of the dump slope inside the open pit and the safe distance from the upper slope edge for placing mining equipment. This reflected the geomechanical situation occurring within the boundaries of the dump formed in the open-pit field with a high degree of reliability. It was determined that the maximum standard safety factor values of the open-pit slopes are within the limits when the overburden rocks border on the hard bedrock (Ks.s.f ≥ 1.2). Under the condition where the dump slope bordered on sedimentations represented by clays, loams, and sands with a strength of 2–3 on the Mohs scale, the safety factor decreased by 22%. It was determined that the minimum safe distance from the outer contour of the dragline base to the upper edge of a single-tier dump was 15.5 m with a safety factor of 1.21. The maximum safe distance values in the range of 73.5–93 m were concentrated within the boundaries of sections 5–9, with a safety factor from 1.18 to 1.28. When the dragline was located within the boundaries of section 7, the dump construction works should be conducted only if the dump exist for up to 3 years. Based on the identified parameters, on the example of using the ESH-11/70 walking dragline, a technological scheme of its operation was developed with the allocation of safe boundaries for its placement when forming an internal dump. The results obtained are useful for the development of projects for the reclamation of depleted open pits.

Iron ore underground mining under the internal overburden dump at the PJSC “Northern GZK”

Deterioration of mining conditions at mining deposits by open pit methods (increased mining depths, reduced ore deposit thickness) leads to an increase in mining costs. In Ukraine, to reduce open pit mining costs, overburden is disposed in temporary internal dumps located directly in the open pit over the ore reserves. Reactivation of pit areas with the temporary internal overburden dump located on them results in a surge of mining operations and deterioration of technical and economic indicators. Increased energy consumption, a decrease in working site parameters, an increase in angles of open pit slopes and stripping lags lead to unprofitability of open pit mining. One of the solutions to the mentioned scientific and engineering problem involves combined mining of deposits by integrated open pit and underground mining operations. The combined open pit-underground mining method enables reducing mining costs and enhancing technical and economic indicators. The suggested schemes for opening reserves located under the internal overburden dump enhance technical and economic indicators of deposit mining through making the internal dump a permanent one. This allows further disposal of overburden into internal dumps. Implementation of scientific recommendations and technological solutions resulted from the research performed (exemplified by the deposit Hannivske, Ukraine) reduces the cost of ore by 1.33 USD/t. At the same time, the total cost of building an underground mine makes 16.4 M USD, which is 30% less than when applying traditional opening vertical shaft schemes.

Evaluation of Dump Slope Stability Using Slide, Geoslope and Phase 2 software

Global energy demand continues to grow rapidly. The increasing energy demand needs to be met by fossil fuels, especially in countries like India. In these countries, coal is the major energy producer and mechanized surface mining is the only way to support coal production. In the near future, shallow depth coal reserves will be depleted, and deeper coal deposits will be exploited by surface mining, resulting in handling an immense amount of overburden. In open cast mines, dumping overburden as internal dumps involves many risks and hazards such as slope failure, handling dust sediments in surroundings, and soil erosion in wet weather. As a result of the lack of a dump area, mining companies tend to elevate dump heights, thereby increasing the likelihood of sliding. The stability of these dumps slopes has been a significant concern over the years. The slope stability analysis of a mine dump is presented in this paper by calculating the factor of safety using three different software programs: Slide, Geo-slope, and Phase2 software, and the results obtained are compared.

The effect of an extended agricultural reclamation on changes in physical properties of technosols in post-lignite-mining areas: A case study from central Europe

Opencast mining destroys soils that have formed over many thousands of years. Their place is taken by post-mining areas such as external and internal dumps with materials whose physical and chemical properties are unfavorable from the point of view of plant growth and development. In order to minimize the negative effects of opencast mining, reclamation is necessary. In this work, we examined the impact of 42-year agricultural reclamation, in which three variants of mineral fertilization (0NPK, 1NPK, and 2NPK) were applied in the cultivation of alfalfa with the addition of orchard grass on changes in physical properties of Technosols. After forty-two years of agricultural reclamation, there has clearly been a differentiation of post-mining material into genetic horizons that differ in physical properties. The surface part of Technosols was converted to a humus-enriched surface horizon (Ap), which consisted of two subhorizons: Ap1 and Ap2, differing in structure, color, and consistency. In the 1978–2020 period in Ap1 of fertilized soils, there was a decrease in bulk density (BD, 9.0–10.9%) and particle density (PD, 1.5%), but an increase in structural stability index (SI, 243–337%), soil porosity (SP, 15.5–19.2%), air-filled porosity (AFP, 10.8–11.7%), field capacity (FC, 49–21.6%), plant available water capacity (PAWC, 46.4–48.0%) and S-index (46.9–50%). In the Ap2 subhorizon, there was a similar trend of changes; however, BD (for 2NPK), FC (for 1NPK), and PAWC (for 1NPK and 2NPK) were not significant. BD (5.4–14.3%) increased in most horizons of parent material (Cd) between 1978 and 2020, and SP (10.9–29%), AFP (16. 2–73.9%), and S-index values (9.4–34.4%) decreased. On the other hand, PD, SI, FC, and PAWC values did not change significantly.Cultivation o alfalfa with orchard grass in the 1978–2020 period significantly affected the profile variation in physical properties of Technosols, which was not observed when the field experiment was set up (1978). In the Ap horizon, DB and PD had significantly lower values, while SI, SP, AFP, FC, PAWC, and S had significantly higher values compared to parent materials (Cd). This is related to the indirect effect of soil organic carbon (SOC), which was beneficial to improving the surface horizon properties of developing Technosols. The diversity of physical properties of the 42-years old post-mining Technosols in the Ap was dependent on fertilization, especially in the Ap1 subhorizon. In fertilized Technosols, the BD and PD values were lower, and SP, DP, AFP, FC, PAWC, and S values were higher compared to unfertilized Technosols. Parent material (Cd) horizons after 42 years of reclamation had similar physical properties regardless of fertilization.

ENSURING THE STABILITY OF INTERNAL DUMPS ACCORDING TO THE RESULTS OF PHYSICAL AND MECHANICAL PARAMETERS OF SOILS

Purpose. The paper considers the issues of ensuring the stability of internal dumps consisting of soft rocks. This issue is relevant because the stability of quarry boards and dumps affects the safety of work in quarries. Methodology. When assessing the stability of slopes, the method of determining the minimum coefficient of stability, equal to the ratio of restraining forces to shear forces that arise in the slope array.
 Findings. The calculation and assessment of the stability of the slopes of the dumps are carried out on the example of Malyshevsky rutile-zircon-ilmenite deposit. The geological structure of the deposit overburden is represented by loess-like loams, red-brown clays, gray-green clays, fine-grained sands. To ensure the stability of internal dumps, the selective formation of dumps is proposed, which is presented in this paper in two ways. In the first variant, the dumping of Sarmatian gray-green clays into the lower part of the heap, which are weakly permeable and have low strength, is considered. In the second variant, a layer of Sarmatian sands is poured into the base of the dump. According to the normative value of the coefficient of stability margin, depending on the physical and mechanical properties of the rocks that make up the array, the optimal height and slope angle of the dump are determined. When assessing the stability of the slopes of the dump, the impact of groundwater and the possibility of location in the developed space of the tailings were also taken into account.
 Originality and Practical implications. Studies have shown that the most rational option is the formation of internal heaps with embedding in the base of the lower tier of the heap with a height of 40 m layer of Sarmatian sands; in the case of embedding in the lower part of the inner heaps of gray-green clays, it is advisable to form the lower tier of the heap with 2 sub-tiers up to 20 m high; the upper tier of the dump is recommended to be formed by one massif 26 m high. Besides, in the produced space of the quarry, the location of the tailings is possible in case of dumping Sarmatian sands into the base of the dump.

Calculating of dumps stability laying on weak gently dipping interface

Relevance of the research. Stable parameters of dumps are critical in mining operations ensuring their safety and economic efficiency. This problem is particularly acute for mining enterprises engaged in surface mining and for coal open pit mines, in particular. One of the main problems of this issue is related to the substantiation of rigorous methods for assessing stability and determining the limiting parameters of external and internal dumps filling an embankment on weak gently dipping interface. In the technical and regulatory literature, this issue has been considered for a long time. However, there are no specific recommendations for finding the most dangerous sliding surfaces on slopes, as well as methods for calculating shearing and restraining forces along these surfaces. All the signs are that the reason for the stability loss of operated dumps is the absence of theoretically substantiated design schemes, respectively, there are errors in the design of dumping. Purpose of the work is to develop reliable methods for calculating the limiting parameters of dumps on weak gently dipping interface. The main idea of the work is to apply a new, not previously used scheme for calculating the stability of dumps on weak gently dipping interface. Research methods. The work deals with the apparatus of flow mechanics and more specifically, the rigid-plastic model (the method of limit equilibrium), and the variational, integral and differential branches of calculus act as a mathematical apparatus. Results and conclusions. Based on the results of previous studies, a new scheme for calculating the stability of the dump during its destruction along weak interface was proposed, which implies the absence of a curved section of the sliding surface under the slope and the convex shape of the sliding surface under the berm. In contrast to the existing calculation schemes, such a calculation scheme predicts significantly lower values of the critical parameters of dumps. It means that the use of the proposed scheme will prevent the destruction of dumps by landslides along the dumpbasement interface and increase the economic efficiency of enterprises. Because a sufficiently large overestimation of the critical parameters of dumps at weak interface limited by current regulatory documents has been determined, it is recommended to revise these parameters for the designed and operated dumps using the proposed schemes for calculating their stability.

Histogram Method for Determining the Location of the Internal Dump in Coal Open Pits

With the deepening of open pit mining, the volume of worked out space increases and, along with it, the potential capacity for storing overburden. At the same time, the pits completely allocated for the internal dumps are used only by the end of the period of the open pit operation. The known theoretical approaches to determining the location of the internal dump are little implemented in the practice of surface mining, which is explained by two reasons. First, standard design solutions are based on wellknown theoretical provisions; secondly, a formalized template approach to substantiating certain design developments in the field of dumping of internal dumps prevails, which pushes them towards their fragmentary rather than integrated implementation. With regard to the conditions of the Kuzbass open-pit mines, the article proposes a modernized interpretation for the formation of structural schemes of the sequence of quarry fields on the basis of constructive-and-parametric studies of a multivariate adaptation of the internal dumping mode.

Perspective trends for the development of cycle-flow technology in deep quarries taking into account the structure of their working area

Over the past 20 years, the parameters of the working zone of deep quarries have changed, which began to consist of sections of inclined and steep sides. At a number of deep iron ore quarries, temporary internal dumps of overburden rocks began to be created in the working area, which influences the choice of schemes for opening deep horizons in cyclic-flow technology (СFT). The purpose of the study is to substantiate promising directions for the development of CFT in deep iron ore quarries, taking into account the structure of their working area and the use of steeply inclined conveyors (SIC). It is shown that with certain parameters of a large piece transported by the conveyor belt, contained in the transported rock mass, and its certain kinetic energy, stable operation of the system, widely used steeply inclined and inclined conveyors, is achieved. The parameters of a steeply inclined conveyor when transporting rocks with a high density were determined. It is assumed that with the same kinetic energy of a piece (ore, rock) contained in the transported rock mass, stable operation of a steeply inclined conveyor will be ensured. Based on this, the parameters of the transported piece and the parameters of the steeply inclined conveyor are determined. According to the maximum size of the pieces that come after crushing in a cone crusher for coarse crushing on a steeply inclined conveyor, its stable operation is ensured at a density of transported rocks of not more than 2.8 t/m3. The economical use of SIC is achieved by combining the cyclic-flow technology with SIC and with the technology of pre-enrichment of ore in a quarry. For these conditions, the use of cyclic-flow technology with steeply inclined and inclined conveyors is justified. The structure of the working zone of a deep quarry with gentle and steep sides is considered. For these conditions, rational schemes for the opening of horizons with steep sides of the open pit and the use of temporary internal dumps was developed. The depth of the quarry, at which it is necessary to introduce a new opening scheme, was established. It is shown that the time of transition to the next opening scheme is significantly affected by the productivity of the quarry and the rate of decrease in mining operations.

Justification of multi-section clay storage parameters on the pit internal dump during the integrated use mining of placer deposits

Purpose is an establishment of efficient parameters of a multi-section man-made deposit at the pulp clays storage on the surface of internal pit dumps during the development of placer deposits. The analytical research method was used to establish the main parameters of man-made deposits sections depending on their width and depth. A graphical research method was used to establish the downtime duration between formation of the first and second sections of the man-made deposit. It is established that division of the man-made deposit into five sections parallel to the mining front reduces time period till start of its operation from 8 to 5 years for it thickness 10 m and from 7 to 5 years at thickness 20 m. However, a significant disadvantage is the increassd number of sections in the man-made deposit from 2 to 5 is an increase in the volume of construction work from 0.27 to 1.11 million m3 at thickness 10 m, and from 0.53 to 2.15 million m3 at thickness 20 m, which confirms the necessity to find an effective number of sections in the man-made deposit and their parameters. The dependence between beginning of the works on filling the man-made deposit and the width of its first section delays start of the filling works, but too small width causes downtime at transiting from the first section to the second one. Efficient width of the man-made deposit first section is established, in which downtime is reduced from 7 years to 5.8 years, and volume of raw materials located outside the pit is reduced by 0.1 - 0.5 million m3 depending on the width of the first section. A method is proposed for determining an effective width of the first section in a two-section man-caused deposit, in which occurs while filling the sections. It is established that effective width of the first section oin the two-section man-made deposit with thickness of 10 m and with parameters of a typical pit development at mining of titanium-zirconium deposit is 241 m.

ОСОБЕННОСТИ ФОРМИРОВАНИЯ ДАВЛЕНИЯ НА МАССИВНЫЕ ПОДПОРНЫЕ СТЕНКИ В УСЛОВИЯХ СЛАБОСВЯЗНЫХ ПОРОД

A scheme and method for constructing a collapse prism for loosely connected rocks of internal dumps in their interaction with massive retaining walls are proposed. The dependences of the change in the cross-sectional area of the collapse prism on the slope angle of the blade surface, the angle of laying the retaining wall, the angle of internal friction of the blade rocks and the angle of friction of rocks against the retaining wall are obtained. The dependence of the pressure change on the retaining wall on the adhesion of the dump rocks is established.

The solution to the problem of the placement of internal dumps in the development for forming the deep pit edges by steep dipping layers

The solution to the problem of the placement of internal dumps in the development for forming the deep pit edges by steep dipping layers

Assessment of current state of conserved areas of mountain rocks in strip mining conditions

In the conditions of the development of today´s mining industries, many coal mining enterprises (even though the production volumes are currently increasing) are looking for the ways to conserve previously mined areas and monitor their ecological state. The extraction of fossils from the depths of the earth produces natural and manmade complexes that have a considerable impact on vast territories. The largest impact lies in turning the lands for general use into commercial mining areas and land allocations. Open cut mining leads to the emergence of quarries, stopes and embankments of different sizes, changes in relevant and absolute elevation marks compared to the initial surface, which is connected with the construction of quarry dumping complexes. Direct dumping methods contribute to the formation of the system of narrow crests that are combined with leveled plateau-like parts of a spoil pile. The slopes of spoil piles have high angles of gradient (14-40°) and are subject to sheet and gully erosions which form large alluvial cones. Technogenic sediments formed at their bottom reach the height of several meters and spread up to a few hundred meters from the dumps. During coal mining, the rocks are stored in external and internal dumps of coal strip mines without any preliminary sorting, which also leads to soil and water pollution with heavy metals.

SUBSTANTIATION OF DIRECTIONS OF RATIONAL USE OF SPATIAL TECHNOGENIC RESOURCES OF DEEP QUARRIES

It presents discussion on scientific and technical problems of rational use of spatial resources steeply dipping deposits in open-pit mine М uruntau. This work discuss basis of following directions for use and functional purpose of the formation of technogenicdeposit in open-pit development: storage rocks, providesecurity works, stabilization of technological processes, formation of structural elements of open-pit mine. Based on analysis of use of technology external and internal dumping in opencast mining in the development of steep deposits installed,that formation of external and internal dumps should occur in a coordinated manner with the development of opencast goaf. The introduction of received results allow to improve efficiency of development of mineral potential with production increase of high liquidity on the world market and improvement of technical and economic parameters of mining operations.

Resilience Analysis of Face Slopes and Internal Dumps and Causes of their Instability at “Mugunsky” Opencast Coal Mine

The paper deals with the problems of initiation and consequences of landslide processes registered in the internal dumps at Mugunsky lignite opencast mine. Water cutting at the internal dump base, availability of clay rocks in the dump bottom, and the bottom incline towards the working face are revealed to be the sources of the landslide process. Some measures are recommended to prevent deformation processes that are possible to take place in the run of mine development.

The features of three- and four-tier internal dumps capacity calculation with the additional capacity preparation in the dump tiers

The paper deals with the task of increasing the volume of rock placed in the internal dump. For that it is necessary first to analyze the existing technology of internal dumping, and then to determine the height of rock tiers being cut in the transport area. Analyzing the mining on the southern pits of Kuzbass it was found that now mostly three-tier dumps are piled. But for placing the extra volume of rock in the internal dump it will be required to pile dumps with more than three tiers.