摘要
为研究深部高应力条件下层状岩体巷道的承载特性及失稳机理,采用物理相似模拟试验方法,并借助高速摄像机、静态电阻应变仪、位移计等手段,研究了不同支护方式(无支护、锚杆支护、锚杆索支护)层状岩体巷道的变形破坏特征和应力演化规律;同时,从压力拱的角度分析了层状岩体巷道的成拱特性。研究结果表明:无支护条件下,巷道围岩变形破坏严重,顶板大面积垮落,呈现倒V型破坏区,无法形成有效的压力拱结构;采取锚杆支护和锚杆索支护后,巷道围岩应力状态得到改善,能够形成有效的压力拱,围岩变形量减小。研究成果为类似地质条件巷道支护设计提供了依据。
In order to reveal the bearing characteristics and failure mechanism of layered rock roadway under the condition of high stress,physical similarity simulation tests are established,and combing with the means of high-speed camera,static resistance strain gauge and displacement gauge,the deformation and failure characteristics and stress evolution law of layered rock roadway under different support modes are systematically studied.From the angle of pressure arch,the arching characteristics of layered rock roadway are also analyzed.The results show that under the condition of no support,the surrounding rock of roadway is seriously deformed and can not form an effective pressure arch structure.When bolt or cable support is adopted,the stress state of surrounding rock of roadway is improved,effective pressure arch can be formed,and the deformation of surrounding rock decreases.The research results can provide a basis for roadway support design under similar geological conditions.
作者
苏士龙
顾晓伟
张力
史新帅
SU Shilong;GU Xiaowei;ZHANG Li;SHI Xinshuai(Shanxi Coking Coal Group Investment Co.,Ltd.,Lyuliang 033000,China;State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221116,China)
出处
《中国矿业》
北大核心
2020年第1期123-128,共6页
China Mining Magazine
关键词
层状岩体
承载特性
失稳机理
相似模拟试验
变形破坏特征
layered rock mass
bearing characteristics
failure mechanism
similarity simulation test
deformation and failure characteristics
