采矿与安全工程学报2015，Vol.32Issue(4)：571-577,7.DOI:10.13545/j.cnki.jmse.2015.04.008
深井高应力软岩巷道围岩变形破坏机制及控制
Deformation failure mechanism of high stress deep soft roadway and its control
摘要
Abstract
In order to solve the problems of large deformation and support of high stress deep soft roadway, taking Xingdong ore-980 as an example, combined with field study, numerical calculation and field test, etc, the degree of the large deformation and deformation failure mechanism of surrounding rock have been analyzed. The causes of its failure have been summarized as follows: fracture develop-ment and strong sensitivity, high crustal stress, complex geological conditions and hydro-physical prop-erty, according to which, the research has indicated that ore-980 roadway is the stress dilatancy expan-sion type composite geological soft rock. The main reasons for the instability of ore-980 roadway have been found to be the development of surrounding rock fracture and the lower strength (under the high stress disturbance) leading to a wide range of breakage, together with the hydro-physical property, com-plex geological structures and rheological characteristics, resulting in the large deformation. Based on the above research,the multiple dimensions coupling support which is centered with high strength an-chor, yieldable ring support and grouting reinforcement has been proposed, and surrounding rock cou-pling support mechanism and specific support form have been analyzed, and the design of parameters of concrete support has been done. Field practice has shown that after 60 d of expansion of ore-980 road-way, the convergence rate of surrounding drops 1 mm/d with roof subsidence reaching 193 mm, road-way's side deformation reaching 114 mm, floor heave reaching 151 mm,which has achieved the goal of effective control of deep roadway with soft surrounding rock.关键词
软岩巷道/深井/变形破坏机制/多层次耦合支护Key words
soft rock roadway/deep mine/deformation failure mechanism/multiple dimensions coupling support分类
矿业与冶金引用本文复制引用
张广超,何富连..深井高应力软岩巷道围岩变形破坏机制及控制[J].采矿与安全工程学报,2015,32(4):571-577,7.基金项目
国家自然科学基金项目(51234005) （51234005）
中央高校基本科研业务费专项资金项目(2010YZ02) （2010YZ02）
