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综放工作面过空巷压架初步分析王庄煤矿朱原平，牛红卫，魏清１概况６１１１综放工作面位于６１盘区上山东部，南北走向，东、西分别相邻６１未采区。工作面长１８０ｍ，走向长２３００ｍ。煤层厚度平均６．４ｍ，底层采高３．０ｍ，顶底板岩性分别为：老顶中砂岩厚１５．...
Preliminary Analysis on Overhead Pressure Support of Overhead Caving Face in Wangong Coal Mine Wang Zhuang Coal Mine Zhu Yuanping, Niu Hongwei, Wei Qing 1 General Situation The 6111 fully mechanized caving face is located in the upper part of the upper part of the 61-plate area in the east and north-south direction. Face 180m long, long 2300m. The average coal seam thickness is 6.4m, the bottom mining height is 3.0m, and the top and bottom lithologies are respectively: 15% of the sandstone in the middle of the old roof. ...