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采用理论分析并结合现场案例,指出冲击地压发生前存在潜在危险源,分析巷道掘进过程中受褶曲和断层等构造因素影响,动压显现强烈,“煤炮”发生频繁,其异常影响因素为巷道施工位置处于褶曲翼部双向受压状态,岩体内部积聚较多的弹性能,同时还处于强剪状态,易发生“板炮”或破坏性冲击。通过对巷道应力显现异常机理分析,查明原因,确定治理对策,起到预防发生破坏性冲击的良好效果,保障巷道施工安全,经济和社会效益显著。
Based on the theoretical analysis and case studies, it is pointed out that there are potential sources of danger before the occurrence of rockburst and the influences of structural factors such as folds and faults during tunneling are analyzed. The dynamic pressure manifests strongly and the occurrence of frequent occurrence of “coal cannon” The reason is that the construction site of the roadway is in a two-way compression state of the folded wing, and the elastic energy accumulated in the rock mass is also strong, and is also in the state of strong shearing, and the prone occurrence of “slapstick” or destructive impact. By analyzing the mechanism of the roadway stress anomalies, identifying the reason, determining the management countermeasures, playing the good effect of preventing destructive impact and ensuring the construction safety of the roadway, the economic and social benefits are significant.