Through the detail introduction on optimization of raining method in Shandong Wangcun Bauxite Mine, this paper puts forward a new mining method——longwallcaving with artificial roof pillar.
通过对山东王村铝土矿采矿方法优化的介绍，提出了一种新的采矿方法——人工顶柱无底柱长壁式崩落法。
2
Based on the similar material simulation and prectical experiment in situ, the movement charactedistic of overburden strata of longwall sublevel cavingmethod has been studied in the paper.
本文用相似材料模拟，现场实测等方法研究放顶煤开采覆岩活动规律。
3
The ventilation system provides a new method to realize the safe and efficient mining of high gas longwall mining with sublevel caving.