建筑物下条带式Wongawilli采煤围岩稳定性模拟研究

Research on stability of surrounding rock of strip pillar Wongawilli mining technology under buildings

为研究建筑物下条带式Wongawilli采煤围岩稳定性,结合漳村煤矿采矿地质条件,提出2种条带式Wongawilli采煤布置方式。通过数值模拟,对比分析2种条带式Wongawilli采煤方式下工作面围岩的应力场、位移场和塑性区变化情况,并对回采结束后地表移动变形及其对建筑物的影响进行计算分析。结果表明,条带式Wongawilli开采双巷单翼布置、单巷双翼布置均能有效控制地表沉陷,不仅能够安全高效地回采煤炭资源,而且还能有效保护地表建筑物。

In order to study stability of surrounding of strip pillar Wongawilli mining under buildings. Based on the geological conditions of Zhangcun coal mine,two kinds of tunnel layouts were put forward. Through the theoretical calculation and the numerical simulation,the stress filed,displacement field and plastic zone in the surrounding rock of different tunnel layouts were studied. Meanwhile,the movement deformation value of the surface ground after the coal mining completed and the influences to the surface buildings was calculated and analyzed. The results show that double entries and single wing mining method is better than single entry and double wings. The strip pillar Wongawilli mining technique can be used to mining face under village,effectively protect surface structures and improve the recovery rate of coal resources.