由于悬露面积增大或老顶来压引起支承压力集中和转移。
Increased hanging area and weighting of main roof caused abutment stress concentration and stress transfer.
对影响悬移支架放顶煤技术成功应用因素进行了系统分析，并总结出了其主要影响因素。
This paper analyzes the success application influence factors about the roof caving technology of cantilever support and summarized it's main factors.
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.
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