煤矿安全2024，Vol.55Issue(6)：134-140,7.DOI:10.13347/j.cnki.mkaq.20230078
双切顶沿空留巷条件下切顶参数对围岩稳定性的影响
The influence of cutting roof parameters on stability of surrounding rocks under the condition of double cutting roof
摘要
Abstract
Taking 4502 working face of Shaqu No.1 Coal Mine as an example,the influence of roof cutting parameters on the stabil-ity of surrounding rock is studied by means of theoretical analysis,numerical simulation and field measurement.The results show that:the double roof cutting can weaken the stress concentration phenomenon inside the solid coal wall,which is beneficial to the stability of the surrounding rock of the roadway,but the larger the height of the roof cutting,the larger the vertical displacement of the roadway roof,which is not conducive to the control of the roof deformation.A certain angle of the roof cutting is beneficial to the collapse of the roof in the mining area,but the larger the angle of the cut roof,the larger the peak stress concentration and the value of the sinking of the roadway roof,which increases the difficulty of the anchor cable reinforcement.The height and angle of the roof cutting should be selected moderately,and the optimum value is 13 m and 15° respectively,when the oblique length of slit is 13.5 m,the results of field measurement and numerical simulation are in good consistency.关键词
沿空留巷/双切顶卸压/切顶高度/切顶角度/围岩稳定性Key words
gob-side entry retaining/double roof cutting and pressure release/cut roof height/cut roof angle/surrounding rock sta-bility分类
矿业与冶金引用本文复制引用
张俊虎,年军,赵博,张伟..双切顶沿空留巷条件下切顶参数对围岩稳定性的影响[J].煤矿安全,2024,55(6):134-140,7.基金项目
国家自然科学基金面上资助项目(52274220) （52274220）
山西省基础研究计划(自由探索类)青年资助项目(202203021212260) （自由探索类）
