切顶卸压沿空留巷技术在新大地矿的应用

Application of roof cutting pressure relief gob-side mining technology in Xindadi Mine

为缓解新大地煤矿采掘接续紧张状况,对该矿2202工作面运输巷进行沿空留巷试验。采用切顶卸压沿空留巷可以使回采工作面少掘1条区段巷道,减少煤柱损失,取消"跳采",实现连续开采,有利于生产集中化。实践表明,切顶卸压沿空留巷提高了煤炭资源采出率,改善巷道围岩的破坏状况,降低巷道支护难度,减少巷道掘进量,延长矿井服务年限,缓解采掘接替矛盾,取消孤岛工作面及缩短工作面搬家时间。

In order to relief the intense mining in Xindadi Mine, gob-side mining experiment was conducted in 2202 transportation roadway. roof cutting pressure relief gob-side mining enables to eliminate one roadway mining, reduce the loss of coal column, call of skip mining, realize continuous mining and production centralization. The practice shows that the technology improves coal mining rate, surrounding rock damage, reduce roadway support difficulty and roadway mining,extend mine service time, relief the mining succession and remove isolated island and shorten the moving of working face.