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Height of overburden fracture based on key strata theory in long wall mining

机译:基于关键地层理论在长壁矿业中的覆盖层骨折的高度

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摘要

Among the three overburden zones (the caving zone, the fracture zone, and the continuous deformation zone) in longwall coal mining, the continuous deformation zone is often considered to be continuous without cracks, so continuum mechanics can be used to calculate the subsidence of overburden strata. Longwall coal mining, however, will induce the generation of wide cracks in the surface and thus may cause the continuous deformation zone to fracture. In this paper, whether there are cracks in the continuous deformation zone as well as the height of overburden fracture in longwall face and the subsidence and deformation of strata of different fracture penetration ratios were studied by means of physical simulation, theoretical analysis and numerical simulation.
机译:在长壁煤开采中的三个覆盖区(塌陷区,断裂区,断裂带和连续变形区)中,连续变形区通常被认为是连续的而无裂缝,因此连续的力学可用于计算覆盖层的沉降 地层。 然而,长壁煤矿将诱导表面的宽裂缝产生,因此可能导致连续变形区裂缝。 在本文中,通过物理仿真,理论分析和数值模拟研究了连续变形区中的裂缝以及长壁面中的覆盖骨折的高度以及不同断裂渗透比的沉降和变形。

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