地震活动与矿井顶板事故影响关系统计分析

针对地震活动与顶板事故进行时空序列统计分析,得出两点新认识:(1)顶板事故与宏观地震序列有较强的频率对应,似乎是遥相呼应;(2)相当多的顶板事故伴随有周边小震发生。推测部分原因是这些矿井位于地震带附近,部分原因是采矿卸压引发矿震,一些地震可能是宏观地震序列中的一部分。如果能够掌握,并加以利用,对于安全生产具有一定意义:对既定煤田,查找周边对矿区地应力影响强烈的地震带或断裂带,这些矿井顶板事故有可能成为周边地震带或断裂带的应力窗,而地震带或断裂带的活动又成为煤矿地质灾害的晴雨表。在煤田大区,可以把顶板事故群发当作构造应力扰动的一种反映,作为大区构造应力扰动传入矿区,再与开采卸压作用叠加,引起地质灾害的证据。

Statistical analysis on the relationship between rock accidents and earthquakes,China

The statistical research on the frequency of rock fall and earthquakes has obtained the following knowledge:(1) there is a good frequency correspondence between rock fall accidents and macro earthquakes;(2) quite a few micro earthquakes occurred at the same time with some rock falling accidents nearby.Some active faults passed through these coalmines; some earthquakes were caused by mining activities; and some were the responses to macro earthquakes.It is an important practice to look for all the active faults with great affection around a given coalmine for its production safety; the earthquakes on these faults will become a barometer of coalmine accidents arid coalmine accident will also become the stress window for the active faults.Roof accidents should be taken as an evidence of tectonic stress fluctuation,which will interrupt the dynamic equilibrium of stress on mining site.