摘要
煤与瓦斯突出危险煤层是矿井开采的严重灾害之一。结合贵州某矿具体地质条件,运用比值判别法、"三带"判别法、围岩平衡法和数理统计法对上行式卸压开采方式进行了理论分析;运用UDEC和FLAC3D数值模拟软件分别对上覆岩层运移和裂隙演化规律与被保护层应力分布进行了分析。综合分析证明下保护层的开采可以对被保护层的矿山压力和瓦斯压力起到有效的卸压作用。
Coal and gas outburst danger coal seam is one of the serious disasters in coal mine mining. This article combined with the specific geologic conditions of a mine in Guizhou, using ratio discriminant, ＂three zone＂ discriminant, surrounding rock mass balance method and mathematical statistics method to analyze the upward depressurized mining method in theory. Numerical simulation software of UDEC and FLAC^3D is used to analyze the laws of crack evolution and migration in overlying rock and the stress distribution of protec- ted layer respectively. Comprehensive analysis shows that the mining of lower protective coal layer can relief the pressure of rock and gas in protected coal layer effectively.
出处
《煤矿安全》
CAS
北大核心
2014年第11期158-160,164,共4页
Safety in Coal Mines
关键词
煤与瓦斯突出
卸压开采
可行性
保护层开采
岩层运移
裂隙演化
coal and gas outburst
depressurized mining
feasibility
protective layer minning
rock migration
crack evolution
