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ni shi liu kui xie shi gu de chu li
Author(s): 
Pages: 47-49
Year: Issue:  9
Journal: Safety in Coal Mines

Keyword:  泥石流水文地质条件石嘴山第四系冲积层支护形式煤系地层上部车场采区轨道掘进断面断面积;
Abstract: <正> 石嘴山三号井开采石嘴山向斜西北翼井田,煤系地层上部复盖巨厚的第四系冲积层,水文地质条件复杂。以一对立井单一水平开拓,设计年产原煤90万吨。中央采区轨道上山全长507.6m,倾角24°20′~27°,下部车场标高+688m,上部车场标高+882m,掘进断面12.6m~2,净断面积9.46m~2。支护形式+750m 以上为混凝土
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