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焦西矿北区泵房在砂岩、粉砂岩、泥岩互层的软弱岩体中开凿(如图1)。采用挂网喷射混凝土支护,并敷设有加固梁。为了判别该支护的可靠程度,焦西矿开拓区、地质组、科研组组织人力在泵房顶部底部和两帮钻取了60米岩芯,进行了岩石力学性能试验,并在水仓进行了地应力的初步测定。最后,由我们对支护和围岩的受力状态,进行了有限元分析。下面介绍分析的结果。
The pump house in the North Area of Jiao Xi Mine is excavated in soft rocks with interbed of sandstone, siltstone and mudstone (Figure 1). The use of netting shotcrete support, and laid reinforcement beam. In order to determine the reliability of the support, Jiaozi mining area, geological group, research group organized the bottom of the pump house and two groups of workers to drill the bottom of the 60-meter core rock mechanical properties of the test carried out in the water tank The initial determination of the stress. Finally, by the finite element analysis of the state of stress on the support and surrounding rock. The following describes the results of the analysis.