摘要
为研究深部多构造地层对巷道围岩稳定性的影响,以余吾煤矿S5203胶带顺槽为研究背景,在分析该煤矿围岩的特性以及破坏的规律后,通过对塑性区域的计算,从而得到控制巷道变形的方法。通过短锚杆对塑性区域进行缔结,使用长锚索对塑性区域与原岩进行固定,由此提出“长短联合分级支护”的支护理念。同时针对向斜地层,使用FLAC 3D模拟并结合工程实测,分析支护后巷道位于向斜轴部以及翼部的应力应变情况。结果表明,S5203胶带顺槽最佳巷道布置形式为布置于向斜翼部的顶板,支护选择“长短联合分级支护”方案,巷道最大顶板下沉值为49.5 mm,两帮最大偏移值为83 mm,该研究可为相似工程提供借鉴。
In order to study the influence of deep multi-structural strata on the stability of roadway surrounding rock,the S5203 belt cross-heading of Yuwu Coal Mine is taken as the research background.After analyzing the characteristics of the surrounding rock of the mine and the law of failure,through the calculation of the plastic zone,the method of controlling the deformation of the roadway is obtained:the plastic zone is concluded by the short anchor rod,and the plastic zone and the original rock are fixed by the long anchor cable,and the support concept of“long and short combined grading support”is proposed.For the syncline stratum,FLAC 3D simulation and engineering measurement are used to analyze the stress and strain of the roadway in the syncline axis and wing after support.The results show that the optimum roadway layout form of the S5203 belt cross-heading is the layout on the roof of the syncline wing.After choosing the scheme of the“long and short combined grading support”,the maximum roof subsidence value of the roadway is 49.5 mm,and the maximum offset value of the two sides is 83 mm.The study can provide reference for similar projects.
作者
杨博
YANG Bo(Division of Continuing Education,Shanxi Institute of Energy,Jinzhong 030600,China)
出处
《陕西煤炭》
2024年第3期6-11,共6页
Shaanxi Coal
关键词
深埋煤巷
向斜构造
塑性分析
数值模拟
工程实测
deep buried coal roadway
synclinal structure
plastic analysis
numerical simulation
engineering measurement
