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通过对掘进工作面的煤岩冲击倾向性、埋藏深度、顶板特性、底煤厚度和地质构造等冲击地压影响因素进行分析,得出高家堡煤矿一盘区回风大巷已经具备了发生冲击地压的条件。因此,在巷道掘进中通过实施大直径钻孔卸压和爆破解危措施开展了冲击地压预防和控制技术的研究工作,并通过钻屑法对防冲效果进行了检验,结果表明:卸压后,各巷道煤粉量均未超标,确保了掘进工作面的安全生产。
Based on the analysis of impact factors of rockburst, burial depth, roof characteristics, coal seam thickness and geological structure such as rockburst, it is concluded that a return airway in a plateau area of Gaojiabao Coal Mine has been established Rock burst conditions. Therefore, research on prevention and control of rock burst by carrying out large-diameter borehole pressure relief and blasting methods in tunneling is carried out. The anti-flushing effect is tested by drilling cuttings method. The results show that: After that, the amount of pulverized coal in all roadways did not exceed the standard, ensuring the safety of heading face.