邻空侧不规则遗留煤柱区巷道掘进冲击地压防治技术

    Prevention and Control Technology of Rock Burst in Roadway Excavation in Irregular Remaining oal Pillar Area Adjacent to Goaf Side

    • 摘要: 针对徐庄煤矿7313材料道邻空侧不规则遗留煤柱区巷道掘进期间强矿震频发,冲击危险性高的现象,基于微震现场实测及理论分析确定了强矿震事件发生时间、能量大小及空间位置,得出不规则遗留煤柱区、厚硬覆岩层、采掘扰动、掘进速度等因素是诱发掘进期间强矿震频发的主导因素。结合7313材料道地质赋存条件、掘进技术条件,针对性制定巷道迎头顶板深孔爆破、巷帮加密钻孔卸压及控制掘进速度的掘进巷道冲击地压综合性防治措施。微震实测结果表明防治措施有效降低了邻空侧不规则煤柱区掘进巷道强矿震的产生。

       

      Abstract: Aiming at the phenomenon of frequent occurrence of strong mine earthquakes and high risk of impact during the roadway excavation of irregular remaining coal pillar area adjacent to goaf side of the 7313 material road, the occurrence time, energy size and spatial location of strong mine earthquake events are determined based on field measurements and the theoretical analysis of microseisms. It is concluded that the irregular remaining coal pillar area, thick and hard overburden, excavation disturbance, and driving speed are the main factors inducing frequent occurrence of strong mine earthquakes during the roadway excavation. Combined with the geological conditions and the driving technology conditions of the 7313 material road, the comprehensive prevention and control measures for rock burst in the excavation roadway are carried out in accordance with the deep-hole blasting of the roadway head roof, the pressure relief of the roadway infill drilling, and the control of the driving speed. The measured microseismic results show that the prevention and control measures can effectively reduce the occurrence of strong mine earthquakes in the excavation roadway in the irregular coal pillar area adjacent to goaf side.

       

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