Assessment of the rock slope stability of Fushun West Open-pit Mine

Zhang, Fei; Yang, Tianhong; Li, Lianchong; Bu, Jianqing; Wang, Tianliang; Xiao, Peng

doi:10.1007/s12517-021-07815-8

Cited by 14 publications

(3 citation statements)

References 34 publications

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“…The hilly landform in the study area is formed by the combined action of crustal uplift and weathering and denudation. Its major bedrock types are Paleogene basalts and Archean granite gneiss complexes [31,34]. The mine products are coal and kerogen shale.…”

Section: Study Areamentioning

confidence: 99%

“…At the same time, due to the special location of "mines in the city", the dramatic changes in the landscape structure and ecological risk changes in the mining area and its surrounding areas seriously affect the daily life of residents in urban areas near the mining area [33]. However, current research on the ecological environment of the study area mainly focuses on mine geological hazards [32][33][34], vegetation and soil effects [31], and the monitoring of the mine geoenvironment [35]. There are few related studies on landscape pattern changes [31].…”

Section: Introductionmentioning

confidence: 99%

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Landscape Analysis and Ecological Risk Assessment during 1995–2020 Based on Land Utilization/Land Coverage (LULC) and Random Forest: A Case Study of the Fushun Open-Pit Coal Area in Liaoning, China

Xu,

Cheng

2024

Sustainability

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China’s Fushun open-pit mine is the largest century-old coal mine in Asia. Large-scale mining and the use of coal has caused dramatic changes in the regional urban landscape pattern, seriously affecting the ecological function and ecosystem stability of its surrounding landscape. Evaluating the ecological risks of the landscape in the urban areas of open-pit mines contributes to the risk management of regional ecosystems and the sustainable development of society. This study selected six-phase Landsat ETM/OLI remote sensing images from 1995 to 2020 and combined them with the random forest model to carry out an LULC classification of the open-pit mine and its surrounding areas and, on this basis, discusses the evolution of its landscape pattern and evaluates the ecological risks. It fills the gap in the research on the evolution of regional landscape patterns and ecological risks in the study area and improves the automatic classification efficiency of LULC for use in open-pit mines. The results show that the classification accuracy of LULC regarding open-pit mines based on image pixels and the random forest model can reach 30 m, and the rate of accuracy can reach 92–97%. From 1995 to 2020, the coverage area of forest land and building land in the study area has increased and is mainly composed of grassland and undeveloped land. The use of land was transferred to the mining area, the water body area maintained a relative dynamic balance, and the overall vegetation coverage of the mining area was greatly improved; the forest land began to expand from the surrounding area to the mining area in 2010, and the construction land began to move from the areas surrounding the mining area to the surrounding valleys in 2015. The landforms have extended radially, and the landscape sprawl index has increased, indicating the optimization of the ecological environment; the high- and medium-risk areas decreased by 75.51 km2, the low-risk areas expanded by 461.48 km2, and the overall ecological risk index decreased. From this, it is possible to conclude that the landscape restoration project adopted in the study area has achieved great results, and the improvement of the ecological environment also directly affects the increase of construction land. These research results can provide scientific guidance for the rational utilization and sustainable development of land resources in urban areas of open-pit mines.

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Section: Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Landscape Analysis and Ecological Risk Assessment during 1995–2020 Based on Land Utilization/Land Coverage (LULC) and Random Forest: A Case Study of the Fushun Open-Pit Coal Area in Liaoning, China

Xu,

Cheng

2024

Sustainability

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“…Earthquakes are a trigger ing factor for the stability of slopes, which requires their tech nical protection. Digital photogrammetry, depth telemetry and infrared scanning technologies are used to evaluate the behavior of overburden [16]. They are effectively used to pre dict geomechanical deformations of slopes in open pit mines under difficult geological conditions.…”

Section: Introductionmentioning

confidence: 99%

Technology of an open pit refinement under limit stability of sides

Moldabayev¹,

Sultanbekova²,

Адамчук³

et al. 2022

Nauk. visn. nat. hirn. univ.

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Purpose. To establish the feasibility of refining deep open-pit mines below the boundary of the use of combined motor-conveyor transport with an increased slope angles of the pit walls using the developed transport unit for reloading rocks to overlying horizons during the reactivation of pillars under transport berms. Methodology. Preparation of a digital block model of the deposit, the elaboration of 3D geomechanical models for the dynamics of mining, 2D and 3D numerical simulation of the rock stress-strain state of the outcrops of opencast workings, mathematical modeling of stepwise ore reserves and mining schedule, patent research and feasibility study. Findings. It is advisable to carry out mining in terms of the marginal rock state with an increase in the slope of the pit sides below the limit of application of the cyclic and continuous method in ultra-deep open pits. Such design of pit sides is achieved when benches are mined from top to bottom within the boundaries of steeply inclined layers with the use of inter-bench loaders of the developed designed in the completion zone. Provisions for the selection and feasibility of using the loader in the deep zone are formulated based on demarcation of application zones of cyclic (road transport) and cyclic-flow (combined road-conveyor transport) technologies. Originality. Schematization of the mining operation was performed based on the calculated values of safety factor of sides, which allows increasing the slope angles of the pit walls of even ultra-deep open pits in the completion zone. It was found that with deepening of mining, the zones of potential sliding move away from the loose overburden to lower ore benches closer to the final depth of the Kacharsky open pit (760 m), but the safety factor corresponds to the required value according to the design standards. Practical value. An increase in the slope of the pit walls in the completion zone can be achieved using the developed loading installation, the main difference of which is that it can be moved without dismantling under conditions of reactivation of transport pillars (with an increase in lifting height by 1.54.5 times compared to the known equipment).

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