【作者】 崔兰； 王树仁；

【Author】 CUI Lan~1,WANG Shu-ren~(2*) (1.Shanxi Design Institute of Communications,Taiyuan 030012,China; 2.School of Civil Engineering and Mechanics,Yanshan University,Qinhuangdao 066004,China)

【机构】 山西省交通规划勘察设计院； 燕山大学建筑工程与力学学院；

【摘要】 深部高应力巷道岩爆灾变机理及其控制对策研究,是目前国内外采矿工程所急待解决的重点难题.应用UDEC计算程序,分析了深部圆巷随开挖半径大小、应力水平高低和应力不均匀程度,围岩内主应力分布和能量耗散特征,发现随应力水平由低至高和应力不均匀程度的加剧,巷道围岩能量耗散值和能量耗散率均成凹形特征曲线急增;随开挖半径由小至大,能量耗散值成凹形曲线急增,但能量耗散率变化却很小;随着应力水平不均匀程度的加剧,在巷道围岩内部形成的主应力差值封闭包核区,呈现由围岩浅部向围岩深部跃移现象;当水平应力大于垂直应力时,在巷道顶板产生主应力差值封闭包核区的范围和量值大小,相对于巷道两帮更为严重.更多还原

【Abstract】 It is the key important problems in the world for research on rockburst disaster mechanism and control countermeasure of the deep mining tunnel under high stress conditions.The principal stresses distribution and energy dissipation was analyzed according to the cases of the excavated radius,the stress level,and the non-uniform stress field of the tunnel with the UDEC technique. The growth curves of the energy dissipation quantity and the energy dissipation ratio were concave with stress level increasing and the non-unifonn stress field aggravating.The growth curve of the energy dissipation quantity was also concave,but the energy dissipation ratio with the excavated radius increasing was almost holding constant.The concentrating zones of principal stress difference were extended and gradually migrated from the outside to the inside in the tunnel surroundings with the non-uniform stress field aggravating.When the horizontal stresses are greater than vertical stresses,the concentrating zones of principal stress difference in the roof usually have more serious consequences than those in both sides of the tunnel.更多还原