祁东矿煤与瓦斯突出动力成因分析

发布时间：2018-08-02 12:56

【摘要】：针对祁东矿多发生小型突出且地点多在构造应力区的现状,采用划分地质单元方法评价其煤与瓦斯突出危险性。结果表明:4个地质单元瓦斯赋存条件和主控因素不同,25次突出集中发生的第Ⅱ单元,主控因素为地应力;测试了原岩地应力场特征,发生多次突出的中央回风下山巷道走向为近SN向,与最大主应力方向夹角大,掘进过程中煤体承受应力较大,构造煤发育;对比同一埋深其它已揭露煤层区域,在瓦斯含量相差不大的情况下,动力现象差异很大;这些都证实瓦斯不是突出的主要动力来源,突出主要动力来源为构造应力,这也决定了不会发生大型煤与瓦斯突出,对瓦斯预测和防治有重要指导意义。
[Abstract]:In view of the fact that small outburst often occurs in Qidong Coal Mine and its location is in the tectonic stress area, the risk of coal and gas outburst is evaluated by the method of dividing geological unit. The results show that the gas occurrence conditions and main controlling factors in 4 geological units are different from each other in the second unit with 25 outbursts, the main controlling factor is the in-situ stress, and the characteristics of the in-situ stress field of the original rock are tested. Several times of outburst of central return wind downhill roadway strike is near SN direction, and the angle with the maximum principal stress direction is big, the coal body bears great stress in the process of excavation, and the tectonic coal develops, compared with other exposed coal seam areas in the same buried depth, In the case of little difference in gas content, the dynamic phenomena are very different; all of these prove that gas is not the main power source of gas outburst, and the main power source of outburst is tectonic stress, which also determines that there will be no large coal and gas outburst. It has important guiding significance for gas prediction and prevention.
【作者单位】：河南省瓦斯地质与瓦斯治理重点实验室(省部共建国家重点实验室培育基地);中原经济区煤层(页岩)气河南省协同创新中心;河南煤化工集团永锦能源有限公司;
【基金】：国家“十二五”科技重大专项课题(2011ZX05040-005) 河南省瓦斯地质与瓦斯治理重点实验室(省部共建国家重点实验室培育基地)外部开放基金资助项目(WS2013A11) 河南省教育厅科学技术重点研究项目(14A440008)
【分类号】：TD713

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