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用小空场法取代壁式法采矿,损失率降低,但在空顶下作业不安全。因此提出三个改进方案:沿底板拉槽中深孔崩矿;分层开采;用锚杆护顶。
With a small empty field method instead of wall mining method, the loss rate decreased, but in the top of the sky unsafe operation. Therefore, three improved solutions are proposed: deep-hole collapse along the floor slab; stratified mining;