中国冲击地压的时空分布特征

    Temporal and Spatial Distribution of Rock Burst in China

    • 摘要: 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。

       

      Abstract: Using statistical investigation method, on the basis of temporal and spatial distribution of rock burst, we carry out the statistical analysis for occurring time of 179 rock bursts in Xinzhouyao, Sanhejian, Qianqiu coal mines. The study shows that the rock burst mines in the south of China are much less than that in the north, and the rock burst mines in the west are much less than that in the east, with a certain degree of regional aggregation characteristics. The occurrence time of coal burst is dispersed, which means it is not concentrated in a specific year, a month or a day. Coal blasting is important forewarning information before rock burst, and coal seams merging area, roadway end of an isolated island working face, advanced stress zone and multi-roadway intersection area are full of bursting risk. Normally, the floor and ribs of a roadway are more easily to be damaged, and mining by layers, blasting and roof suspended a long distance under hard roof would increased the risk of rock burst.

       

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