摘要
杨柳煤矿1061工作面上覆硬厚岩层。针对工作面地质条件,采用数值模拟方法,研究了硬厚岩层下开采覆岩运移规律。研究表明:在破断前,上覆硬厚岩层没有发生明显的位移下沉,硬厚岩层对地层变形起到了"桥式屏蔽作用";破断后,下沉量突然增加,表现出明显的突变性,导致地表移动变形急剧增加,出现大幅度下沉。通过现场支架压力实测进行了验证。
There are hard and thick rock strata overlying on No. 1061 working face of Yangliu Coal Mine. According to the geological conditions of the working face,the numerical simulation method is used to study the migration law of overlying strata under hard and thick rocks. The results show that there is no obvious displacement and subsidence in the overlying strata before the hard and thick rock strata breaks,with a " bridge shielding effect" on ground deformation;After the rock strata breaks,series of phenomenon appear,including suddenly increase in subsidence and an obvious mutation,which lead to a sharp increase in ground deformation and a large amplitude subsidence. This result was verified by the support pressure measurement on the field.
引文
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