急倾斜煤层矸石充填开采数值模拟

Numerical Simulation of Coal Waste Backfilling Mining in Steep Coal Seam

针对急倾斜煤层复杂地质条件,以木城涧煤矿大台井-410水平西四采区5#槽煤柔性掩护支架充填工作面为研究对象,采用离散元数值模拟方法对柔性掩护支架充填开采过程进行数值模拟研究。研究结果表明,随着矸石充填率的增加,煤层顶底板及回风巷道的应力应变环境得到明显改善,减小了围岩应力集中区域,保护回风巷免受采动影响,提高了充填开采的安全性。

According to the complicated geological conditions of steep coal seam, the No. 5 seam in west fourth mining area of -410 m level in Muchengjian Mine was taken as research object, the discrete element numerical simulation method was used to simulate the mining process of steep flexible shield supports. The results show that the stress - strain of coal seam roof and floor and ventilation roadway showed significantly improved with the increasing of filling rate ; the stress concentration region was decreased, which protected ventilation roadway from the influence of mining and improved the safety of backfill mining.