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采用统计调研的方法,在调研全国冲击矿井空间分布的基础上,对忻州窑矿、三河尖矿、千秋煤矿共179次冲击地压的发生时间进行统计分析。研究认为冲击地压矿井在中国北多南少、东多西少,且呈现一定空间聚集特征;冲击地压发生时间并不集中在某一特定的年、月或日,发生时间具有离散性;煤炮是冲击前的重要前兆信息,煤层合并区、孤岛临空巷道端头及超前应力区、多巷交汇区是冲击地压高发区,底板及两帮是受破坏较为严重的区域;分层开采、炮采及坚硬顶板长距离悬顶等条件下冲击危险性增强。
Based on the investigation of the spatial distribution of the impacted mine in China, statistical analysis was conducted on the occurrence time of 179 total impact pressures of Xinzhouyao Mine, Sanhejian Mine and Qianqiu Coal Mine. The study shows that the rockburst in China is less in the north and less in the east than in the west, and shows some characteristics of space accumulation. The time of rock burst is not concentrated in a particular year, month or day, and the occurrence time is discrete. The coal cannon is an important precursor before the impact. The coal seam merger area, the end of the gully roadway and the advance stress area, the intersection of multi-lane are the areas with high rock burst and the bottom plate and the two gangues are seriously damaged. Mining, blast mining and hard roof under the conditions of long-distance roofing and other conditions to enhance the impact of shock.