山柱
- 网络center column
山柱-
介绍了大孔径预裂（光面）爆破技术在凤凰山铜矿无间柱连续采矿试验采场中的应用。
Application of large - diameter pre - fissures or smooth blasting in underground experiment stop of non - pillar continuous mining is introduced in the paper .
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本文着重分析了镜铁山矿无底柱崩落法悬顶问题，为合理安排矿山生产，合理利用矿产资源，提供了参考依据。
The article analyzes how the hanging arch is caused during non-pillar sublevel caving in Jingtieshan mine , in order to provide a reference for rational mining organization and resources utilization .