深井动压巷道保护煤柱合理留设宽度研究

Study on Reasonable Width of Protective Coal Pillar in Deep Well Dynamic Pressure Roadway

以马兰矿深井回采巷道保护煤柱合理宽度为工程背景。利用理论分析的方法,综合考虑埋藏深度、采掘扰动以及时间等影响参数后,确定巷道保护煤柱宽度计算公式,计算可得保护煤柱合理宽度为27m,利用现场钻孔窥视的方法,对不同宽度的工作面巷道保护煤柱进行钻孔窥视,合理的煤柱宽度,有效控了巷道围岩稳定性。

Taking the reasonable width of protective pillar in deep mining roadway of Malan mine as engineering background. By using the method of theoretical analysis and considering the influence parameters of burial depth, mining disturbance and time, the width of protective pillar in roadway is determined, and the reasonable width of protective pillar is 27 M. By using the method of on-site borehole peeping, the protective pillar in different width of working face is peeped through boreholes, and the reasonable width of coal pillar effectively controls the stability of surrounding rock of roadway.