高级检索

深井大断面交岔点变形机理及稳定性控制研究

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

  • 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.

     

/

返回文章
返回