摘要
山东省菏泽市彭庄煤矿西翼-500 m水平行人大巷属于典型中深部软岩巷道,由于支护对策不合理导致围岩变形破坏剧烈。为了得到围岩的变形规律及破坏机制,进行矿压监测、松动圈探测、围岩物理力学参数测试、地应力测试等研究,并提出2次耦合支护方案。为进一步研究2次耦合支护力学机制,对初次支护和2次支护后围岩塑性区与应力分布特点以及初次支护后10~60 d内进行2次支护围岩变形规律进行数值模拟分析。研究结果表明：2次耦合支护能有效控制围岩塑性区的发展,改善应力分布状态,最佳2次支护时间为巷道初次支护后的30~40d。2次耦合支护能有效控制围岩稳定,减小围岩变形,能为类似软岩巷道支护工程提供一定的参考。
The-500 m level pedestrian alleys in Heze city of Shangdong province of Pengzhuang coal mine belongs to the typical deep soft rock roadways, and it was damaged seriously due to the unreasonable support countermeasures. The mine pressure monitoring, loosing circle detection, physical mechanical parameters of surrounding rock test and in-situ stress test were carried out in order to obtain the surrounding rock deformation and failure mechanism. So the secondary coupling support was put out based on the above research results. For further study the secondary support mechanism, characteristics of the surrounding rock deformation mechanism and stress distribution were analyzed by using the numerical finite difference software of FLAC3 D after the initial supporting of roadway 10-60 d. The results show that the secondary coupling support can effectively control the development of plastic zone and improve the stress distribution of the surrounding rock, and the best secondary support time is 30-40 d after the initial supporting of roadway. The secondary coupling support can effectively control the surrounding rock stability and reduce the deformation of surrounding rock, and it provides a certain reference for the similar soft rock roadway supporting engineering.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第4期1262-1271,共10页
Journal of Central South University:Science and Technology
基金
国家青年科学基金资助项目(51309146)
国家自然科学基金资助项目(51379114)
教育部博士点基金资助项目(20130131120084)~~
关键词
软岩巷道
2次耦合支护
数值计算
最佳2次支护时间
参数优化
soft rock roadways
secondary coupling support
numerical calculation
the best secondary support time
parameter optimization
