煤系地层覆盖下铝土矿开采覆岩移动规律数值模拟研究

Simulation study on overburden movement law of bauxite mining under coal measure strata

以山西某煤下铝土矿为研究对象,采用数值模拟方法研究煤下铝土矿开采覆岩移动变形规律。主要研究内容和成果如下:提取了影响煤下铝土矿开采覆岩沉降的主要控制因素,利用FLAC 3D数值模拟软件,分析煤下铝矿块式采场分区放顶开采条件下,不同主控因素的影响及控制作用。揭示了不同采场宽度、采场高度、放顶范围崩落体性质、上覆岩层性质条件下的覆岩移动规律。数值模拟的计算结果以及覆岩移动规律,为构建煤下铝协调开采覆岩裂隙带均匀沉陷控制技术体系提供了依据。

Taking a bauxite mine under coal in Shanxi as the research object,the movement and deformation law of overburden in aluminum mining under coal was studied by numerical simulation method.The main research contents and results are as follows:The main control factors affecting the overlying rock subsidence of aluminum mining under coal are extracted,and the influence and control effect of different main control factors under the co-mining condition of zoned caving of aluminum block stope under coal are analyzed by using FLAC 3D numerical simulation software.It reveals the overburden movement law under different stope width,stope height,caving range and overburden rock properties.The calculation results of numerical simulation and overburden movement law provide the basis for the construction of uniform subsidence control technology system of overburden fracture zone in co-mining with aluminum under coal.