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选用永盛煤矿南井主采2#和9#煤层作为研究对象,根据该煤层最大瓦斯压力和煤样瓦斯基本参数测试结果,评估其突出危险性。测试结果表明:永盛煤矿南井2#和9#煤层突出危险性单项指标和综合指标均超过了《防治煤与瓦斯突出规定》规定的临界值;该井田范围内无明显直达地面的断裂构造,瓦斯难以从构造带释放;煤层埋藏较深且上覆岩层大多为透气性差的岩层,瓦斯保存条件较好。分析确定永盛煤矿南井2#、9#煤层为具有煤与瓦斯突出危险性煤层。
The main mining 2 # and 9 # coal seams in the main well of Nansui in Yongsheng Coal Mine are selected as the research object. According to the test results of the maximum gas pressure and the basic parameters of coal gas in the coal seam, the outstanding danger is evaluated. The test results show that the single and comprehensive index of outstanding danger of No. 2 and No. 9 coal seam of South Mine in Yongsheng Mine exceed the critical value stipulated in Provisions of Prevention and Control of Coal and Gas Outburst; there is no fault structure, It is difficult to release from the tectonic belt; the coal seam is buried deeply and most of the overlying strata are rock layers with poor air permeability, and the gas storage conditions are better. It is determined that coal seam No. 2 and No. 9 coal seam of South Mine in Yongsheng Coal Mine are dangerous seam with coal and gas outburst.