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通过模拟实验对白鹭煤矿分层开采覆岩运移规律进行了深入研究。研究表明:第1分层开采,顶板岩层仅在切眼和工作面推采结束处各产生1条发育一般的至地表的裂隙,保水开采第1分层可行;第2分层开采,可通过在切眼和工作面推采结束处留设隔离煤柱阻隔贯通至地表竖向间隙的水体实现安全开采;第3分层开采,在开采区域靠切眼和工作面推进结束处,各自2条贯通至地表裂缝间岩层水平间隙发育明显,并与导水裂隙带内裂隙沟通,无论从保水开采还是防治水的需要,都应暂不开采。
By means of simulation experiment, the law of overlying strata migration in stratified mining in Bailu Coal Mine has been deeply studied. The research shows that in the first stratified mining, the roof strata produces only one developed general ground surface fissure only at the cut-out and the end of the mining face, and the first stratified mining is feasible. The second stratified mining can be done by In the cut and work face at the end of the push to leave isolated pillars blocked through to the surface vertical gap of the water to achieve safe mining; the third stratified mining, mining area by cutting and face propulsion at the end, each two The horizontal gap between rock layers penetrating to the surface cracks is obviously developed and communicated with the cracks in the water-conducting fractured zone, so it should be temporarily mined not only from the requirement of water-conserving and mining but also water control.