深井大断面交岔点变形机理及稳定性控制研究

Title

Study on Deformation Mechanism and Stability Control of Large Cross Section Intersection in Deep Mine
作者

王炯孙晓明郝育喜郭志飚孟志刚
Author

WANG Jiong SUN Xiao-Ming HAO Yu-xi GUO Zhi-biao MENG Zhi-gang
单位

深部岩土力学与地下工程国家重点实验室中国矿业大学（北京）力学与建筑工程学院
Organization

National Key Lab of Deep Geomechanics and Underground Engineering School of Mechanics and Civil
Engineering, China University of Mining and Technology (Beiing)
摘要

为解决夹河煤矿深部大断面3号交岔点难以支护的问题,分析可知3号交岔点变形破坏的主要原因是高地应力、开挖扰动以及支护体和围岩强度与结构的不耦合,据此提出了锚网喷+锚索+底角锚杆+中间岩柱双控锚索的耦合支护技术,现场应用表明:采用锚网索耦合支护技术后3号交岔点顶底板最大移近量为69 mm,两帮最大移近量为45 mm,3号交岔点变形得到了有效控制。
Abstract

In order to solve the difficult support problem of No.3 intersection of deep large cross section in Jiahe Mine, the paper analyzed the major causes of the deformation failure in No. 3 intersection were the high ground stress, mining and excavation turbulence and the uncoupling between the surrounding rock strength and s tructure. A coupling support technology of bolt/steel mesh/shotcreting + anchor + floor corner bolt + double control anchor in middle rock pillar was provided. The site ap plication showed that after the coupling support applied, a max roof and floor convergence of No.3 intersection was 69 mm, a max convergence of the two sidewalls wa s 45 mm and the deformation of No. 3 intersection was effectively controlled.
关键词

深部矿井大断面交岔点变形机理耦合支护围岩稳定性
KeyWords

deep mine; large cross section intersection; deformation mechanism; coupling support; surrounding rock stability;
基金项目(Foundation)

国家自然科学基金面上基金资助项目(51374214)；国家自然科学基金资助项目(51304210)；中央高校基本科研业务费专项资金资助项目(2011QL07)；
相关文章

[1]超深矿井软岩巷道锚网索耦合支护技术
[2]深部回采巷道锚网索耦合支护技术研究
[3]深部软岩巷道围岩吸水后抗压强度变化规律研究
[4]深部松软破碎煤层巷道锚网索支护技术研究
[5]软岩井底车场巷道变形破坏机理及支护技术研究
[6]综放工作面大断面切眼锚网索支护技术研究