煤矿安全2019，Vol.50Issue(6)：235-239,5.DOI:10.13347/j.cnki.mkaq.2019.06.057
急倾斜煤层端面顶板稳定性分析
Stability Analysis of End Face Roof of Steep Inclined Coal Seam
摘要
Abstract
The pressure of the steep roof is complicated, and the steep coal seam is strongly extruded by the tectonic movement in the process of formation. The soft surface of the joints and cracks in the coal seam and its top and floor is more developed, and it is easy to lose stability and collapse. Take 3402 working face of Chenmanzhuang Coal Mine as the object, the roof hole observa-tion, the theoretical analysis of the roof mechanics model and the numerical simulation are carried out to further analyze the sta-bility of the face roof of the steep coal seam, and the results show that the steep inclined coal is a steep coal seam. The roof of the working face is relatively broken, which easily causes the roof falling accident and affects the supporting capacity of the hy-draulic support, and then causes the frequent coal wall caving and the safety accidents. The stress concentration degree still in-creases with the increase of the advancing distance of the working face because of the insufficient filling. The failure degree of the top plate of the steep coal seam is serious, and the physical model of the face roof of the steep inclined coal seam is established. Through the establishment of the physical model of the stope of the steep seam, the initial pressure step L of the top plate is cal-culated by the theoretical formula, and the maximum tensile stress is compared with the tensile strength of the roof rock, and the roof breakage of the steep seam is obtained.关键词
急倾斜煤层/端面顶板/钻孔成像仪/数值模拟/矿山压力Key words
steep inclined coal seam/end face roof/borehole imager/numerical simulation/ground pressure分类
矿业与冶金引用本文复制引用
WANG Nan,ZHENG Shangshang,LI Shanshan,KONG Dezhong..急倾斜煤层端面顶板稳定性分析[J].煤矿安全,2019,50(6):235-239,5.基金项目
贵州省本科高校一流专业(采矿工程)建设资助项目(SJZY2017006) （采矿工程）
大学生"SRT计划"资助项目(贵大SRT字(2018) 182 号) （贵大SRT字(2018）
贵州省高等学校大学生创新创业训练计划资助项目(201810657020) （201810657020）
