摘要
倾斜煤层由于其特殊的地层特性,所开采巷道的围岩应力呈现出非对称特征,使得倾斜煤层巷道支护难度高于水平煤层。为了解决严重影响巷道稳定的不平衡应力以及原有支护过剩等问题,以山西黄岩汇5301工作面为实例,通过数值模拟软件FLAC3D分析不同锚索排布、角度、顶锚杆数量条件下的直角梯形巷道的围岩应力,确定最优支护参数。结果表明,当锚索呈“3-3-3”排布且垂直于巷道顶板,顶锚杆数量为6时,数值模拟效果最优,同时根据现场矿压观测结果,优化后的支护参数可以有效保障直角梯形巷道的稳定性。
Due to the special stratum characteristics of inclined coal seam,the surrounding rock stress of the mining roadway presents asymmetric characteristics,which makes the support difficulty of inclined coal seam roadway higher than that of horizontal coal seam.In order to solve the unbalanced stress that seriously affected the stability of the roadway and the surplus of the original support,No.5301 Face of Shanxi Huangyanhui Mine was taken as an example,the surrounding rock stress of the right angle trapezoid roadway under the conditions of different anchor cable arrangement,angle and number of top bolts was analyzed by the numerical simulation software FLAC3D,so as to determine the optimal support parameters.The results showed that the numerical simulation effect was optimal when the anchor cables were arranged in"3-3-3"and perpendicular to the roadway roof,and the number of roof bolts was 6.At the same time,according to the field observation results of rock pressure,the optimized support parameters could effectively guarantee the stability of the right angle trapezoid roadway.
作者
李昊
李娅琪
郑鑫健
Li hao;Li Yaqi;Zheng Xinjian(School of safety engineering,North China Institute of Science and Technology,Yanjiao 065201,China)
出处
《煤炭与化工》
CAS
2023年第4期5-9,13,共6页
Coal and Chemical Industry
基金
河北省自然科学基金面上项目(E2021508011)
河北省高等学校科学技术研究“青年拔尖人才”计划项目(BJ2020208)。
关键词
倾斜煤层
直角梯形巷道
数值模拟
锚索排布
锚索角度
顶锚杆数量
inclined coal seam
right angle trapezoid roadway
numerical simulation
arrangement of anchor cables
anchor cable angle
number of roof bolt
