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在沃尔库塔煤矿公司“工业化”矿井,为了预防冒顶事故,并为在顶板破碎地区的回采创造良好的工作条件,对不稳固的岩石用注入胶结浆液的方法进行了物理化学胶结加固试验。当1013-长壁工作面通过地质褶皱破碎带时,对采煤工作面和直接顶板的下部岩层进行了化学胶结加固。褶皱地带的岩石强度低,裂隙发育,致使工作面煤层塌落和顶板冒落。顶板冒落高度达1.5～2米,工作面塌落深度2～2.5米。顶板上有泥板岩
At the “industrial” mine at the Volta Kotta coal mine, physical and chemical cementation tests were carried out on unsteady rock using cementitious slurries to prevent roof fall accidents and create good working conditions for the recovery of the roof crushed area. When the 1013-longwall face passes through the geological fold-and-fold belt, chemical bonding has been carried out on the lower face of the coalface and the direct roof. The strength of the rock in the fold zone is low and the fractures develop so that the coal face collapses and the roof falls off. Roof caving height of 1.5 to 2 meters, caving face depth of 2 to 2.5 meters. Slate rock on the roof