摘要
本文对影响马头门稳定性的因素及其作用方式进行了研究,认为开挖使围岩应力重分布并引起围岩的力学软化是首要因素;围岩的吸水软化性是重要因素;其他仅影响马头门局部稳定性的为次要因素。文中通过采用数值分析的方法对开挖后围岩的力学软化进行了研究,马头门右侧硐室底部、左侧硐室两帮、马头门与井筒相贯线位置以及井筒上下一定高度范围内的围岩破坏严重,最大竖向位移值的为相贯线位置,其次为马头门右侧硐室底部;通过现场观测分析可知,开挖之初围岩主要发生力学软化,塑性位移增长速率大,同时伴随着岩体完整性的降低,锚索支护能对抑制围岩内应力软化的扩展有较好的效果。
in this paper, the factors affecting the stability of ingate and function way were studied, think excavation surrounding rock stress redistribution and mechanical softening is the primary cause of surrounding rock;The water softening are important factors of surrounding rock;Other only affects ingate as local stability of the secondary factors.In this paper, through using the method of numerical analysis of surrounding rock after excavation on the mechanical softening were studied, the horse gate on the right side at the bottom of the cavern, the two sides on the left side of the cavern, ingate and the curve shaft position and wellbore damage of surrounding rock within the scope of a certain height from top to bottom, the curve for the position of the maximum vertical displacement, followed by the horse gate on the right side of the bottom of the cavern;Through the field observation analysis shows that the excavation softening occurs mainly at the beginning of the surrounding rock mechanics, the plastic displacement rate, accompanied by the integrity of the rock mass is reduced, the anchor rope supporting can to curb the expansion of the internal stress of surrounding rock softening has a better effect.
作者
刘涛
Liu Tao(Gao Yang coal mine in shanxi xiaoyi 032300 shanxi FenXi mining group ,Shanxi Xiaoyi 03230)
出处
《煤矿现代化》
2018年第5期170-173,共4页
Coal Mine Modernization
关键词
弱胶结地层
马头门
围岩稳定
weak cementation formation
The horsehead door
The surrounding rock stability
