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煤层重复采动的覆岩破坏规律较为复杂,尤其是面临浅埋深薄基岩层下地表水体下的安全开采。以某矿实际地质情况为基础,通过构建数值模拟模型及现场实测反演确定出2-3煤层开采时的覆岩力学参数,在此基础上,进行3-1煤层重复开采的数值模拟分析,最终确定了重复采动影响下的覆岩破坏高度,并论证了该区域的重复开采的安全可行性。
The overburden mining rule of overburden mining is more complicated, especially in the safe mining under the surface water body under the shallow and deep thin bedrock. Based on the actual geological conditions of a mine, the mechanical parameters of overlying strata during the mining of 2-3 coal seam were determined by constructing numerical simulation model and field inversion. Based on this, the numerical simulation of repeated mining of 3-1 coal seam was carried out. Finally, the height of overburden destruction under the influence of repeated mining is confirmed, and the safety and feasibility of repeated mining in this area is demonstrated.