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以贵州某煤矿1401工作面4~#煤层为研究对象,在充分考虑岩溶区溶洞、岩层节理存在的基础上,运用RFPA2D-Strata数值软件对开采引起覆岩移动变形过程进行分析。模拟结果显示:开采过程中覆岩发生应力重分布形成应力拱,应力拱和溶洞附近应力集中,覆岩变形、破坏首先发生于节理及溶洞附近,每一层岩层的冒落都会经历变形、离层、断裂和冒落这样一个过程,溶洞的存在改变了覆岩破坏途径。
Taking coal seam 4-1 in a coal mine 1401 in Guizhou Province as an example, based on the existence of karst caves and joints in the karst area, RFPA 2D-Strata numerical software was used to analyze the deformation and deformation of the overburden rock. The simulation results show that the stress redistribution occurs in the overlying strata during the mining process to form the stress arch. The stress arch and the stress concentration near the cave cover the deformation and failure of the overlying strata. The collapse firstly occurs near the joints and caves, and the deformation of each strata of the strata undergoes deformation. Layer, rupture and fall, the existence of cave changed the way of overburden destruction.