利民煤矿煤与瓦斯突出的地质构造条件研究

On geological structure condition of coal and gas outburst in Limin Colliery

在对湖南利民煤矿煤与瓦斯弱突出区域、强突出区域和未突出区域的地质构造特征作详细分析后 ,发现煤层顶底板断 褶构造发育不协调、边界条件不一样 ,引起Ⅰ、Ⅱ、Ⅲ、Ⅳ各区的应力分布不均匀 ,构造复杂程度具一定的差异性 ;同时探讨了构造应力场和煤与瓦斯突出的关系 ,认为构造应力决定着突出强度的大小 ,进而控制煤与瓦斯突出的区域、密度、强度的差异性 .所得结论为矿区煤与瓦斯突出预测防治提供了理论依据 .

Based on the comprehensive analysis of the characteristics of geological structure of weak?outburst,intensity?outburst and non?outburst blocks of coal and gas in Limin Colliery of Hunan,it finds the unharmonization of fault?fold structure between the roof?bottom,the difference of the boundary conditions of coal seam,which leads to the asymmetry of stress distributing and difference of structure complexity in blocks Ⅰ,Ⅱ,Ⅲ,Ⅳ.The relations between tectonic stress field and coal and gas outburst are discussed.Meanwhile,it considers that structural stress control coal and gas outburst blocks,as well as difference of outburst frequency and intensity.Therefore,its conclusion provides a theroretical basis for the forecasting and prevention and controlling of coal and gas outburst in mining area.