巷道围岩弱结构灾变失稳与破坏区域形态的奇异性  

RESEARCH ON FAILURE OF SOFT STRUCTURE AND SINGULARITY OF FAILURE ZONE OF ROADWAY SURROUNDING ROCK

作　　者：蒋金泉[1] 曲华[1] 刘传孝[1] 

机构地区：[1]山东科技大学泰安校区,山东泰安271019

出　　处：《岩石力学与工程学报》2005年第18期3373-3379,共7页Chinese Journal of Rock Mechanics and Engineering

基　　金：教育部骨干教师资助计划项目;山东省自然科学基金资助项目(Q99F07)

摘　　要：巷道围岩复合结构在矿井工程应力的作用下呈现复杂的、非均衡的变形破坏现象,围岩弱结构对巷道围岩破坏区域发育形态、结构变形破坏演变过程以及围岩稳定性等具有重大影响。按照复合结构特征与工程应力环境,将围岩弱结构分为岩性弱结构、几何弱结构和应力弱结构三大类别,主要有11种弱结构形式。巷道围岩弱结构变形破坏具有灾变失稳效应,即首先从弱结构部位发生破坏,其进一步扩展将导致围岩整体灾变失稳与支护体失效。探地雷达井下探测表明,巷道围岩弱结构破坏区域发育形态具有多样性和奇异性,在岩性差异较大的岩层界面上会发生奇异性变化,弱结构起着主控作用。提高弱结构部位的支护强度,实行非均称支护,可以有效地控制弱结构变形破坏的扩展及灾变失稳,具有控制围岩整体稳定性的特效。Under engineering stresses in colliery, deformation of multiple structure of roadway surrounding rock is complex and unbalanced. The soft structure has important influence on shape of failure zone, process of deformation and stability of rock mass. There are eleven kinds of soft structures such as roof and floor and two sides with single property soft structures, layered soft structure of sides, coal and rock pillar soft structure, engineering stress and sectional shape soft structure, which can be divided into three types of rock feature, geometric shape and stresses by multiple structures and engineering stresses. Deformation of soft structure has failure effect that whole failure process of surrounding rock and supports is from failure of soft rock whose intensity is low and degree of stress concentration is high. Probing records of the ground penetrating radar in colliery present that shapes of failure zone are different and singular on interfaces of different rock masses whose diversity of rock properties is obvious. Soft structure has the leading role in the shape of failure zone, different type of soft structures has the great diversity to the shape of failure zone; and the thickness of failure zone is bigger than that in places else. Equal supporting patterns used frequently don＇t match to the deformation characteristic of soft structures in roadway; therefore, by high supporting strength on soft structure and unbalanced supports, deformation and failure of whole surrounding rock may be controlled effectively.

关 键 词：岩石力学 巷道围岩 弱结构 类型 变形破坏 破坏区域形态 非均称支护 

分 类 号：TD313[矿业工程—矿井建设]