俯伪斜采煤法防治急斜煤层煤与瓦斯突出的研究  

Study on Preventing Coal and Gas Bust in Pitch Oblique Underhand Mining

作　　者：余海龙[1] 尹光志[1] 鲜学福[1] 

机构地区：[1]重庆大学建筑工程学院

出　　处：《重庆大学学报（自然科学版）》1999年第3期107-111,共5页Journal of Chongqing University

摘　　要：对急倾斜煤层俯伪斜分段密集支柱采煤法和直线长壁采煤法的采场矿压显现规律和煤与瓦斯突出预测指标进行了现场观测和模拟实验研究，其研究结果表明：俯伪斜采煤工作面的周期来压步距为１８．５ｍ，约为直线长壁工作面周期来压步距１０ｍ的两倍，周期来压时采面上部的最大能量动载系数为２．０３，比直线长壁工作面小０．５３．煤壁前方支承压力集中系数为１．６７，比直线长壁工作面大０．２～０．２５，而支承压力峰值距煤壁距离为６～１０ｍ，较直线长壁工作面大０．５～１ｍ．即俯伪斜分段密集支柱采煤法通过降低回采工作面前方煤体支承压力系数和增大回采工作面前方煤体的安全煤柱宽度，来提高采场煤与瓦斯突出防治能力。Based on the measurements in situ and modeling experiment, this paper systematically analyzes the behavior of underground pressure and outburst prediction index at oblique underhand mining and straight longwall mining on strike in steep coal seam. The research results show that the periodic weighting gap of the pitch oblique mining face is 18.5 meters, and is once or less larger than that of the longwall face on strike. The maximum energy dynamic concentration coefficient in the face is 2.03, and less 0.53 than that in the longwall face, the stress concentration of abutment pressure ahead of the face is 1.67, 0.2～0.25 less than that of the longwall face, but the distance between the situation of stress concentration and the coal wall is 6～10 meters ,and 0.5～1.0 meters more than that of the longwall face .This demonstrates that the oblique underhand mining can improve the outburst-prevention ability, via decreasing the stress concentration of abutment pressure and enlarging the outburst-prevention buffer zone .

关 键 词：煤 瓦斯突出 俯伪斜采煤法 防治 急斜煤层 

分 类 号：TD713.1[矿业工程—矿井通风与安全]