中厚煤层切顶卸压沿空留巷支承压力监测研究

Research on abutment pressure monitoring along gob side entry formed by roof cut and pressure releasing in middle-thick coal seam

以宏景塔一矿切顶卸压沿空留巷项目为工程背景,采用数值模拟和现场实测的方法来分析工作面和巷道的支承压力分布规律。研究表明,主运输巷进行切顶留巷后,能够对支承压力分布产生明显影响。主运输巷垂直方向的支承压力要明显小于辅运输巷。同时,靠近切缝侧的液压支架压力要低于工作面中部和远离切缝侧的支架压力。

Taking the roof cutting and pressure releasing and gob side entry program at Hongjingta No.1 Mine as the engineering background, the numerical simulation and measurement method were used to analyze the distribution laws of abutment pressure of work face and roadway.The research showed that after the main roadway roof was cut, it can significantly affect the abutment pressure distribution.The abutment pressure in the vertical direction of the main roadway was significantly smaller than that in the auxiliary roadway.At the same time, the pressure of the hydraulic support near the cut side was lower than that in the middle of the work face and away from the side of the cut.