摘要
大倾角煤层回采过程中,由于顶板及煤层倾角较大,在重力分量作用下,往往导致巷道下帮应力及位移量相对较大。为探究巷道支护的围岩应力集中问题,加强巷道支护管理,通过对锚杆支护参数进行计算,并通过MIDAS软件对巷道断面形式进行了竖直分析。结果显示,直墙拱形断面能有效减少巷道围岩应力集中现象,有利于巷道后期维护。
During the mining process of large dip angle coal seam, due to the large dip angle of the roof and coal seam, under the action of gravity component, the stress and displacement of the roadway tend to be relatively large.In order to explore the stress concentration of surrounding rock in roadway support, strengthen the roadway support management,calculated the bolt support parameters and analyzed the roadway section form vertically by MIDAS software.The results show that the straight wall arch section can be effective.Reducing the stress concentration of surrounding rock in the roadway is conducive to the maintenance of the roadway.
引文
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