Inclination effect of coal mine strata on the stability of loess land slope under the condition of underground mining
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Inclination effect of coal mine strata on the stability of loess land slope under the condition of underground mining Xue‑yang Sun1 · Chun‑Hsing Ho2 · Cheng Li3 · Yucheng Xia1 · Qi Zhang1 Received: 1 July 2018 / Accepted: 17 July 2020 © Springer Nature B.V. 2020
Abstract The coal seam mining-induced characteristics of overlying strata fracture and surface subsidence are tested and numerically analyzed using the similar materials. Two mining models were conducted in a laboratory with two different rock orientations and slopes to simulate the stability conditions and driving conditions of the loess land slope of under the guides of the V-shaped law. Given a 30° dip angle of coal seam in the Model 1, the results show that the loess landslide on top of inclined rock layers is in the state of critical instability when working face advances to 100 m. Whereas, given a 30° dip angle of coal seam in the Model 2, the loess landslide on top of anti-inclined rock layers is in the state of critical instability when working face advances to 120 m. Numerical analysis using a discrete element method was performed to compare the analysis results with laboratory findings. Based on the test and numerical analysis results both indicate that the land sliding along loess land slope are most likely be triggered on inclined rock layers than anti-inclined rock layers when an underground mining activity begins to excavate. Keywords Similar material simulation · Numerical simulation · Inclination · Loess landslide · The “V” glyph rule
* Xue‑yang Sun [email protected] * Chun‑Hsing Ho chun‑[email protected] Cheng Li [email protected] Yucheng Xia [email protected] Qi Zhang [email protected] 1
College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China
2
Department of Civil Engineering, Construction Management, and Environmental Engineering, Northern Arizona University, Flagstaff, AZ 86011, USA
3
Key Laboratory of Mine Geological Hazards Mechanism and Control, Xi’an 710054, China
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Natural Hazards
1 Introduction The occurrence of geological disasters such as landslide, collapse, ground subsidence, mine earthquake induced by coal mining extraction has become the bottleneck of the sustainable development in coal mining area (Galybin 1997). The surface topography of the ground over mining excavations plays a key role in the mechanism of subsidence (Salmi et al. 2017). Wang et al. (2016) presented an investigation on the characteristics of overlying strata collapse and mining-induced pressure in landslide-influenced zone by employing the physical modeling. Underground mining activities have a large influence on in situ stress state, which could eventually reactivate nearby preexisting landslips (Budi et al. 2014; Alber et al. 2009; Lambert and Coll 2014; Sainoki and Mitri 2016). The green mining technology system, which closely related to the mining method, the structure and attitude of overlying rock, is the technical guarantee for the sustainable development of th
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