摘要
以新强煤矿45051急倾斜综采工作面为工程背景,采用UDEC数值模拟计算的方法,研究不同煤层厚度、倾角及面长条件下工作面顶板的活动规律。研究表明:急倾斜煤层工作面覆岩破坏的范围主要在采空区中上部,上部顶板主要受拉伸破坏,采空区底鼓现象比较明显;煤层倾角越大,煤厚越大,面长越长,急倾斜工作面顶板活动越剧烈,其中煤层倾角对其影响最大。研究结果对急倾斜工作面围岩与支架稳定性控制具有理论指导意义。
Based on No.45051 fully mechanized coal mining face in the steep inclined seam of Xinqiang Mine as an engineering background,the UDEC numerical simulation calculation method was applied to the study on the roof movement law of the coal mining face under the different seam thickness,different inclination and different face length.The study showed that the failure scope of the overburden strata above the coal mining face in the steep inclined seam was mainly at the top of the middle section in the goaf,the top roof was mainly affected by the tensile failure and the floor heave phenomenon in the goaf was obvious.The steeper seam inclination,the high thick seam and the longer coal mining face,the roof movement of the coal mining face in the steep inclined seam would be more serious and the seam inclination would have high influences to the roof movement.The study results would have theoretical guidance significances to the stability control of the surrounding rock and the powered supports in the coal mining face in the steep inclined seam.
出处
《煤炭工程》
北大核心
2013年第9期79-82,共4页
Coal Engineering
基金
国家自然科学基金项目(51174192
50904063)
江苏省研究生创新工程(CXZZ11-0310)
关键词
急倾斜
数值模拟
顶板活动规律
综采工作面
煤层厚度
steep inclination
numerical simulation
roof movement law
fully mechanized coal mining face
seam thickness
