Dangerous Zoning and Stability Assessment of Slopes at Antaibao Open Pit Coal Mine in China

Abstract With the depletion of shallow coal resources in China, the depths and scales of mining have increased. For several coal mines, the extraction has changed from open-pit to underground. Due to open-pit and underground mining disturbance, landslide disasters frequently occur at high and steep slopes of open-pit mines. The effective identification of danger zone of slope and accurate determination of corresponding stability is important in the field of geotechnical engineering. Herein, Antaibao open-pit coal mine was employed as the research object. Firstly, as per the composition and structural characteristics of on-site slope rock mass, six typical disaster factors were summarized, while the assignment criteria for discrete and continuous variables were divided according to the landslide body characteristics and spatiotemporal distribution. Thereafter, based on the comprehensive evaluation principle of fuzzy mathematics, high and steep side stability in the multi-factor influence regions was comprehensively evaluated, while the spatial division of the unstable region was determined. Finally, the slope potential slip surface in the unstable zone of the western side was utilized as the calculation model object, and sensitivity analysis of the slope impact factor was conducted using the MSARMA method. Therefore, the earthquake as well as drainage rate (groundwater dynamics) were determined as the sensitivity factors. The numerical simulation of FLAC3D finite difference method was performed to analyze the evolution law of displacement field under natural, seepage, and vibrational conditions of the northwest slope.

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Assessment of the Underground Water Contaminated by the Leachate of Waste Dump of Open Pit Coal Mine Based on RBF Neural Network

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.599.272 ◽

2012 ◽

Vol 599 ◽

pp. 272-277 ◽

Cited By ~ 1

Author(s):

Zhi Bin Liu ◽

Xiao Wei Yang

Keyword(s):

Neural Network ◽

Network Model ◽

Neural Network Model ◽

Coal Mine ◽

Comprehensive Evaluation ◽

Rbf Neural Network ◽

Training Sample ◽

Underground Water ◽

Open Pit ◽

Waste Dump

This paper used RBF artificial neural network to evaluate the underground water contaminated by the leachate of waste dump of open pit coal mine of Xinqiu in Fuxin. Firstly, with the advantages of neural network method in dealing with nonlinear problem, the RBF neural network model was built. Then, the normalized standard matrix was taken as training sample and the MATLAB software was used to train the training sample. Finally, the monitoring data were taken as test samples and were inputted in the RBF neural network model to evaluate the groundwater quality of study area. At the same time, the concept of degree of membership was adopted in the result making it more objective and accurate. The result shows that the ground water of this mining is seriously polluted, class of its pollution is Ⅳ-Ⅴ.The method with strong classification function and reliable evaluation results is simple and effective, and can be widely applied in all kinds of water resources comprehensive evaluation.

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Study on steep slope stability of coal mine under open-pit and underground mining

2011 International Conference on Materials for Renewable Energy & Environment ◽

10.1109/icmree.2011.5930634 ◽

2011 ◽

Cited By ~ 2

Author(s):

Xuchun Wang ◽

Peng Zhang ◽

Jindong Li ◽

Ning Wang

Keyword(s):

Slope Stability ◽

Coal Mine ◽

Underground Mining ◽

Steep Slope ◽

Open Pit

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Stability and Deformation Analysis for Excavation and Backfilling of Fushun West Open-Pit Coal Mine

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.353-356.751 ◽

2013 ◽

Vol 353-356 ◽

pp. 751-755 ◽

Cited By ~ 1

Author(s):

Yong Cheng Yan ◽

Xian Zhang Ling ◽

Feng Zhang ◽

Jia Hui Wang

Keyword(s):

Coal Mine ◽

Slip Surface ◽

Surrounding Rock ◽

Open Pit ◽

Deformation Analysis ◽

Interface Model ◽

Safety Coefficient ◽

Mine Slope ◽

The Stability ◽

Technical Basis

Taking section W400 of Fushun west open-pit coal mine for the research, the interface model of fracture zone and surrounding rock was established. FLAC3D is used to analysis the influence of excavation and backfill of open-fit coal mine to the slope stability and deformation. The numerical results and analysis show that: (1) when the open-pit coal mine slope is excavated to final production line, the safety coefficient is 2.98, with the excavation, the deformation of the Fushun No.1 Refinery Factory area increases. (2) With the increase of backfilling, the slope coefficient increases to 3.32, this will reduce the deformation of the Fushun No.1 Refinery Factory area. Furthermore, the positions of the dangerous slip surface and serious deformation part of factory area should be regards as key areas. These conclusions could provide technical basis for the stability analysis of Fushun west open-pit coal mine.

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Justification of stripping and development of a modular mine site for a combined coal mining method in Kuzbass on the example Baikaimskaya mine site

Записки Горного института ◽

10.31897/pmi.2020.3.293 ◽

2020 ◽

Vol 243 ◽

pp. 293

Author(s):

Roman Shishkov ◽

Valerii Fedorin

Keyword(s):

Coal Mining ◽

Development Strategy ◽

Coal Mine ◽

Underground Mining ◽

Coal Industry ◽

Open Pit ◽

Kuznetsk Coal ◽

Mine Site ◽

Geological Conditions ◽

Mining Work

The article considers one actual method for development coal deposits in the Kuzbass by open-underground mining. The scientific and practical advantages of the proposed method due to the use of common infrastructure of coal mine and a modular mine site (subsequently transformed into a mining and technological structure operating according to the mine – longwall scheme) are presented. Currently, a development strategy for Kuzbass until 2035 has been developed. As part of the strategy, a draft program for subsoil use is being formed in the coal industry department. The program should take into account all the positive and negative aspects associated with coal mining in cities and municipal areas and also their prospects. In the Kuznetsk coal basin, 42 mines and 52 opencast mines are mining, of which 12 enterprises use partially unified infrastructure. According to the results of open-underground mining work conducted by the laboratory of the Institute of Coal and Coal Chemistry of the Siberian Branch of the Russian Academy of Sciences (Institute of Coal SB RAS), the list of sites includes favorable mining and geological conditions with incidence angles of up to 18 degrees. As open-pit coal production increases, many sites encounter such a parameter as maximum allowable (boundary) strip ratio. At the stage of preparing the feasibility study for the development of a coal deposit, this coefficient is calculated first of all, since duration of enterprise’s work and its economic component depend on it. In order to increase parameters, it is necessary to carry out transition from open works to underground. As a result, coal mine will not work at a loss, providing production with an economically disadvantageous strip ratio.

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Study on End-wall Slope Stability of Surface Coal Mine under the Condition of Combined Open-pit Mining with Underground Mining

International Journal of Advances in Applied Sciences ◽

10.11591/ijaas.v5.i2.pp65-71 ◽

2016 ◽

Vol 5 (2) ◽

pp. 65

Author(s):

Peng Hongge ◽

Cai Qingxiang ◽

Zhou Wei ◽

Shu Jisen

Keyword(s):

Coal Mine ◽

Underground Mining ◽

Surface Mining ◽

Open Pit ◽

Open Pit Mining ◽

Surface Mine ◽

Minimum Width ◽

Surface Coal Mine ◽

End Wall ◽

Wall Slope

With the deepening of surface coal mine, the application of combined surface mining with underground mining is increased now. According to the influence analysis of underground mining on surface coal mine end-wall slope, the thin plate model of mined slope was proposed with distortion and stress distribution of the girder studied. Considering the practice of combined surface mining with underground mining, the modified method was put forward. Based on the roof breaking law of mined slope, the minimum width of protecting coal pillar was elicited. Subsequently this paper took the combined mining practice of Anjialing surface mine as example to study the subsidence law of roof and the influence of underground mining to surface mine slope. The research conclusion indicates that under the condition of combined mining the deformation and subsidence of overlying strata are obvious with a clear lag time, and the ceiling distortion evokes distortion of mined slope, which can be used as the theory sustainment to stabilization of mined slope under combined surface mining with underground mining.

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3D Fracture Network and Block Analysis of the South End-Slope of Antaibao Coal Mine

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.353-356.1165 ◽

2013 ◽

Vol 353-356 ◽

pp. 1165-1170

Author(s):

Ma Ming ◽

Hong Jie Li ◽

He Lei

Keyword(s):

Coal Mine ◽

Underground Mining ◽

Fracture Network ◽

Distribution Functions ◽

Open Pit ◽

The South ◽

Observation Window ◽

Actual Measurement ◽

Group Distribution ◽

3D Fracture Network

Based on actual measurement of fractures in south end-slope of Antaibao Coal Mine which adopted open-pit and underground mining, the fractures were grouped by directions, and for each group, distribution functions of direction, length and other geometric parameters and density on the observation window were calculated respectively. The statistic results showed that the fracture orientation followed Fisher distribution and the trace length followed lognormal distribution. According to the fractures number, the mean traces length and standard deviation, as well as one-dimensional density of each group, 3D fracture network was simulated with Monte-Carlo method. Then the block theoretical model was built according to the fracture model, and the block distribution of the south end-slope was analyzed and forecast.

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