冲击地压矿井掘进巷道卸压钻孔创新研究

Innovative research on pressure relief drilling hole in driving roadway of rock burst mine

大直径卸压钻孔作为一项常规的防冲预卸压措施,广泛应用于矿井冲击地压防治工作。然而冲击地压矿井掘进工作面的正常掘进期间如何保证滞后迎头10~30 m范围内和超前掘进头的卸压钻孔及时施工,防止卸压钻孔施工不及时形成应力集中,一直困扰着掘进防冲工作。系统阐述22311机巷安全通道掘进期间大直径钻孔卸压的创新设计施工和使用,实现超前掘进面施工卸压钻孔,在不影响卸压效果的前提下保证冲击地压巷道连续掘进。通过工程施工期间的多参量防冲监测数据分析,该卸压孔卸压效果良好,能有效避免巷道掘进期间应力集中,可供类似冲击地压巷道掘进期间卸压工程设计参考。

As a conventional pre-pressure relief measure, large diameter pressure relief drilling hole has been widely used in mine rock burst prevention and control.However, how to ensure the timely construction of pressure relief drilling holes within the range of 10~30 meters behind the head-on and ahead of the drivinging head in the normal driving period of the driving face of the rock burst mine, and prevent the stress concentration from being formed in time during the pressure relief drilling holes construction, has been puzzling the driving and anti-impact work.This paper systematically expounds the innovative design, construction and application of pressure relief for large diameter drilling holes during the safety passage excavation of 22311 belt conveyor roadway.Through innovative design, pressure relief drilling holes can be realized in advance driving face construction, and the purpose of continuous excavation of rock burst roadway can be ensured without affecting the pressure relief effect.According to the analysis results of multi-parameter anti-impact monitoring data during the construction period, the innovative design of the pressure relief hole has a good pressure relief effect after construction, effectively avoiding the stress concentration during roadway excavation, which can be used as a reference for the pressure relief engineering design during similar rock burst roadway excavation.