大断面T型巷道交岔点围岩失稳控制数值模拟研究  

Numerical Simulation Research on Large Cross Section T-type Roadway Surrounding Rock Intersection Instability Control

作　　者：陈珊[1] 马晓丽[1] 

机构地区：[1]石家庄信息工程职业学院,河北石家庄050000

出　　处：《煤矿安全》2016年第11期61-64,共4页Safety in Coal Mines

基　　金：河北省高等教育学会2015年高等教育科学院课题资助项目(GJXH2015-25)

摘　　要：为解决T型巷道交岔点跨度大、围岩控制困难的问题,采用理论分析、数值模拟和现场实测相结合方法,研究T型巷道交岔点围岩破坏特征、控制机理和控制效果。研究发现:巷道交叉三角区域是最易失稳区,破坏形式有顶板冒落和弯曲下沉,影响因素有巷道断面、岩体强度、交叉角度和埋深等;基于加强两巷相交初期三角区域支护原则,提出T型巷道交岔点主巷、支巷和三角区锚网索加强支护技术和参数;数值模拟和现场实测表明锚网索加强支护后,围岩应力值和应力集中程度都明显缓和,巷道位移在可控范围之内,受力环境明显改善,支护形式和参数选择较合理。To solve the problems of large span, difficult control of surrounding rock in T - type roadway intersection, combining meth- ods including theoretical analysis, computer simulation and field measurement are adopted to study the failure characteristics, control mechanism and control effect of T -type roadway intersection surrounding rock. Research found that： triangular area formed by the in- tersection of roadways is the most vulnerable area of instability, and damage forms are roof caving and curved sinking and affecting fac- tors are roadway cross - section, rock strength, the crossing angle and depth, etc ; based on the principle of strengthening triangle re- gional support in early two lane intersection, we proposed technology and parameters for T - type roadway intersection main lane, branched lane and triangle mesh and anchor support; numerical simulation and field test shows that after anchor net reinforced support, stress and stress concentration significantly ease roadway displacement in the controllable range, the force environment improved signifi- cantly, supporting forms and parameters are more reasonable.

关 键 词：T型巷道 交岔点巷道 失稳特征 数值模拟 围岩控制 

分 类 号：TD325.1[矿业工程—矿井建设]