采矿与安全工程学报2017，Vol.34Issue(5)：948-954,7.DOI:10.13545/j.cnki.jmse.2017.05.018
巷道薄分层软弱底板围岩变形控制机理与支护实践
Surrounding rock deformation control mechanism with thinly-layered soft and weak floor in roadway and its supporting practice
摘要
Abstract
Aiming at the deformation instability problem for the thinly layered soft and weak floor of the roadway, this paper studies the buckling instability mechanism and control technology for the thinly layered soft floor using a combination of theoretical analysis, mechanical calculations, numerical simu-lations, field tests and measurement in underground. It is found that a certain integrity and greater inten-sity of the combination of rock beam can be formed under the support of the thinly layered floor rock. The damage from buckling changes into composite rock beam damage. Such mechanical properties are the essential reasons to achieve the goal of stability control for thin plate surrounding rocks; Increasing floor bolting strength can enhance the thinly layered rock strength and flexural rigidity by taking it as a combined beam; The cable-stayed anchor could increase the strength and flexural rigidity while resist-ing some lateral pressure and further reduce floor heave. In this paper, a case study on the stability con-trol of surrounding rock of a typical weak and thinly layered bottom tunnel is introduced in detail. The research results have significances value for the support engineering under similar conditions.关键词
薄分层软弱底板/底板支护/组合岩梁/底鼓Key words
thinly-layered soft and weak floor/floor support/combined beam/floor heave分类
矿业与冶金引用本文复制引用
李传明,谢广祥,林远东,张振全..巷道薄分层软弱底板围岩变形控制机理与支护实践[J].采矿与安全工程学报,2017,34(5):948-954,7.基金项目
国家自然科学基金项目(51504005,U1361208) （51504005,U1361208）
安徽省高等学校自然科学研究项目(KJ2015A091) （KJ2015A091）
深部煤矿采动响应与灾害防控安徽省重点实验室开放基金项目(KLMME12103) （KLMME12103）
