Slope stability of increasing height and expanding capacity of south dumping site of Hesgoula coal mine: a case study

Pan, Weidong; Pan, Weiliang; Luo, Jianyang; Fan, Leilei; Li, Shaocheng; Erdenebileg, Ulziikhutag

doi:10.1007/s40789-020-00335-y

Cited by 20 publications

(12 citation statements)

References 7 publications

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“…Coal mining under the slope not only changes the structural characteristics of the slope rock mass but also makes the stress in the slope redistributed. 23,24 Researchers have used various means to explore the stress evolution law of the mining slope 25,26 in which the force chain is an important means to reflect the transfer path and direction of the surrounding rock force. Oda et al 27 found that the force chain played an important role in the development of shear bands through experimental research.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the evolution law of mining‐induced fractures and deformation rock mass structure of gently inclined layered slope

Zhao

et al. 2022

Energy Science & Engineering

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Landslide induced by underground mining is the main type of geological disaster in Guizhou Province. The spatial position of the mined‐out area is the key factor affecting the deformation evolution of mining landslides. Three typical mining‐induced slopes in western Guizhou Province are selected to establish the engineering geological model. The orthogonal experimental design is carried out with the position of the mined‐out area relative to the slope shoulder (PM) and the slope height (SH) as variables, and the discrete element simulation test is carried out. The influence of the two variables on the evolution of overlying strata fractures and the structure of slope surface deformed rock mass is analyzed by gray relational method. The results show that under the effect of mining, the overlying strata rock on the mined‐out area gradually collapses and produces cracks through the surface. The force chain arch gradually develops from the lower part to the surface rock layer, and the slope surface rock layer is transformed from a cantilever beam embedded at one end to a multisegment articulated beam. Depending on the number of segments of the articulated beam structure, it can be divided into three categories, and the rock mass where the slope collapse occurs is mainly concentrated at the end of the multisegment articulated beam. The central subsidence of the subsidence basin, the length of the end of the articulated beam, the position of the fulcrum, and the rotation angle of the beam structure are the key indicators affecting the stability of the multisegment articulated beam. Gray relational analysis shows that PM is the primary factor to control the output of these indicators. The multiple linear regression model of gray relational degree between PM and SH was constructed, and the prediction formula of gray relational grade was obtained, which realized the multiobjective prediction of the overlying strata rock structure model under the same slope parameters. The results provide the theoretical basis for disaster prevention and mitigation of gently inclined layered mining slopes.

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Section: Introductionmentioning

confidence: 99%

Experimental study on the evolution law of mining‐induced fractures and deformation rock mass structure of gently inclined layered slope

Zhao

et al. 2022

Energy Science & Engineering

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“…To improve the containment capacity of the Hesgoula south dumping site, Pan proposed three capacity expansion and increase plans, used GeoStudio software for comparison, and determined the capacity expansion plan [1]. Huang took the open-pit mining slope of a mine in Jiangxi province as the research object, and the failure mode of the slope is determined as follows: slippage along the fault plane-rock plate, bending-tracing the schistosity plane of phyllite, and eventually the failure occurs along the foot of the slope, or "collapse" failure occurs [2].…”

Section: Introductionmentioning

confidence: 99%

The Law of Instability and Failure of the Slope of Dumping Site: A Case Study in Inner Mongolia, China

Pan

Luo

Pan

et al. 2021

Shock and Vibration

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In order to study the law of instability and failure in the process of loading of the south dumping site of Hesgoola Coal Mine, the FLAC 3D numerical simulation experiment and the bottom friction simulation experiment were carried out for the deformation and failure of the slope of the south dumping site, the law of instability and failure in the process of loading of south dumping site is obtained, and the relevant safety precontrol measures and suggestions are put forward. This is of great significance to ensure the safety production of the south dumping site of Hesgoola Coal Mine.

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“…Zhong and Ma (2020), He et al (2021) researched the slope stability by using the ANSYS/LSDYNA software. From the 1950s to 1960s, the ideal elastic-plastic analytical solution of surrounding rock of axisymmetric circular roadway, namely Kastner equation, was derived (Obert and Duvall 1967;Jaeger and Cook 1978). Based on the stress balance theory of loose media and the stress differential equilibrium equation, Hou and Ma (1989) obtained the coal seam interface stress and the width of the stress limit equilibrium zone (plastic zone) of the coal body.…”

Section: Introductionmentioning

confidence: 99%

Stability Analysis of Rib Pillars in Highwall Mining Under Dynamic and Static Loads in Open-Pit Coal Mine

Chen

et al. 2021

Preprint

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The highwall miner can be used to mine the retained coal in the end slope of an open-pit mine. However, the instability mechanism of the reserved rib pillar under dynamic and static loads is not clear, which restricts the safe and efficient application of the highwall mining system. In this study, the load-bearing model of the rib pillar in highwall mining was established, the cusp catastrophe theory and the safety coefficient of the rib pillar were considered, and the criterion equations of the rib pillar stability were proposed. Based on the limit equilibrium theory, the limit stress of the rib pillar was analyzed, and the calculation equations of plastic zone width of the rib pillar in highwall mining were obtained. Based on the Winkler foundation beam theory, the elastic foundation beam model composed of the rib pillar and roof under the highwall mining was established, and the calculation equations for the compression of the rib pillar under dynamic and static loads were developed. The results show that with the increase of the rib pillar width, the total compression of the rib pillar under dynamic and static loads approximately decreases in an inverse function, and the compression of the rib pillar caused by static loads of the overlying strata and trucks has a decisive role. Numerical simulation and theoretical calculation were performed in this study. In the Numerical simulation, the coal seam with a buried depth of 122 m and a thickness of 3 m was mined by the highwall miner. According to the established rib pillar instability model of the highwall mining system, it is found that when the mining tunnel width is 3 m, the reasonable width of the rib pillar is at least 1.3 m, and the safety factor of the rib pillar is 1.3. The numerical simulation results are in good agreement with the results of theoretical calculation, which verifies the feasibility of the theoretical analysis of the rib pillar stability. The research results can provide an important reference for the stability analysis of rib pillars under highwall mining.

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Slope stability of increasing height and expanding capacity of south dumping site of Hesgoula coal mine: a case study

Cited by 20 publications

References 7 publications

Experimental study on the evolution law of mining‐induced fractures and deformation rock mass structure of gently inclined layered slope

Experimental study on the evolution law of mining‐induced fractures and deformation rock mass structure of gently inclined layered slope

The Law of Instability and Failure of the Slope of Dumping Site: A Case Study in Inner Mongolia, China

Stability Analysis of Rib Pillars in Highwall Mining Under Dynamic and Static Loads in Open-Pit Coal Mine

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