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牛马司矿业有限公司水井头矿-300东大巷布置在5煤底板,埋深550m,揭穿的围岩主要为深灰色砂质泥岩和灰色薄层状粉砂岩,节理裂隙均很发育。该巷道曾采用多种支护方式:砌碹支护、锚网喷支护、工字钢支护、U型钢支护、料石砌墙和钢梁支护。巷道掘出后就剧烈变形,掘进初期每天两帮移近量达到30mm左右,1个月后累计移近量达到500mm以上,而且底鼓严重,从开始掘进到目前已经历了18年,虽多次反复修理,巷道一直未能正常使用,导致整个矿井采掘严重失调,水井头矿西翼已
Niumasi Mining Co., Ltd. The Shuijingtou-300 east lane is arranged on the bottom of 5 coal bed with a buried depth of 550m. The surrounding rock is mainly dark gray sandy mudstone and gray thin-bedded siltstone with well-developed joints and fractures. The roadway has used a variety of support methods: Mound support, anchor net spray support, I-beam support, U-shaped steel support, stone wall and steel beam support. After excavation, the roadway drastically deforms. During the initial excavation, the amount of two moves near each day reaches about 30mm. After 1 month, the cumulative moving amount reaches 500mm or more and the bottom drum is serious. It has been 18 years from the start of excavation till now Subsequent repairs, the roadway has not been able to normal use, leading to a serious imbalance in the mining of the entire mine, wells head West Mine has