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在理论分析急倾斜煤层开采过程中覆岩破坏形态特征的基础上,以新集三矿1100307工作面开采为背景,运用FLAC3D软件模拟煤矿开采引起的煤层顶板覆岩运移过程,并结合该工作面电法探测结果,确定“两带”发育特征。“两带”发育总体上呈似倒“厂”型形态,覆岩破坏的范围主要位于在采空区的上山方向的底端,直接顶岩层被剪断或顺层滑落,采空区被充填形成“砌体拱”结构。
Based on the theoretical analysis of the characteristics of overburden rock failure during the mining of steep coal seam, taking the mining of the 1100307 working face of Xinji No.3 coal mine as an example, FLAC3D software was used to simulate the overburden migration process of coal seam roof caused by coal mining. Surface electrical detection results, to determine the “two bands ” developmental characteristics. The development of the “two belts” generally appears to be inverted “plant” type. The scope of the overburden failure is mainly located at the bottom of the ascending direction of the goaf. The direct top rock strata are either cut or slipped, The area is filled to form a “masonry arch” structure.