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shen jing ruan yan kuang ya xian xian gui lv ji xiang dao zhi hu jie gou
Author(s): 
Pages: 38-40+56
Year: Issue:  10
Journal: Coal Science and Technology

Keyword:  支护结构矿压显现规律软岩巷道联合支护深井一次支护混凝土围岩强度泥岩二次支护;
Abstract: <正> 王家营立井,煤系地层属上侏罗纪,开拓深度820m,围岩强度低,遇水易膨胀、变形、崩解、泥化,属深井软岩。1982年立井转入平巷施工,巷道穿过泥岩、泥质页岩、粉砂岩、煤层,围岩稳定性差。1985年底完成5372m巷道,其中混凝土璇177m,压
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