摘要
针对夏店煤矿复杂巷群围岩应力分布复杂现象,采用"Rhino-Griddle-Flac3D"联合方法构建夏店煤矿复杂巷群的数值模型,揭示复杂巷群应力转移机制.研究发现:当工作面推进到距离3120 回风巷回风绕道40 m、30 m、20 m、10 m、0 m和-10 m时,应力转移导致3120回风巷道两帮、3120高抽巷与3120高抽巷回风通道形成的交岔点区域出现应力集中,最大应力值分别为19.25 MPa、20.22 MPa、19.36 MPa、20.19 MPa、19.00 MPa和21.50 MPa,回采工作面的超前区域以及交岔点位置区域极易出现应力集中情况.此位置处受应力转移影响较大,应加强对上述区域的重点控制,保证巷群围岩的整体稳定性.
Abstract
In response to the complex phenomenon of stress distribution of the surrounding rock in the complex roadway group of Xiadian Coal Mine,a numerical model of the complex roadway group of Xiadian Coal Mine is constructed using the"Rhino-Griddle-Flac3D"joint method to reveal the stress transfer mechanism of the complex roadway group.The research finds that when the working face advances to a distance of 40 m,30 m,20 m,10 m,0 m,and-10 m from the return air detour of the 3120 return air roadway,stress transfer causes stress concentration occurs in the intersection area formed by the two sides of the 3120 return air roadway,the 3120 high extraction roadway,and the 3120 high extraction roadway return air channel.The maximum stress values are 19.25 MPa,20.22 MPa,19.36 MPa,20.19 MPa,19.00 MPa,and 21.50 MPa,respectively.The advanced area and intersection location area of the stoping working face are prone to happen stress concentration situation,and this position is greatly affected by stress transfer.Therefore,it is necessary to strengthen the key control of the above areas to ensure the overall stability of the surrounding rock of the roadway group.
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