钢管混凝土支架在千米深井动压巷道中的应用  

Steel tube concrete support applied to dynamic pressure roadway inkilometers deep mine

作　　者：高延法[1] 刘珂铭[1] 何晓升[1] 谢浩[1] 高琨鹏 陈冰慧 张凤银[1] 

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《煤炭科学技术》2015年第8期7-12,共6页Coal Science and Technology

基　　金：国家自然科学基金资助项目(51474218;51134025)

摘　　要：为解决华丰矿煤矿-1 100 m水平大巷支护过程中出现的围岩变形量大、变形持续时间长的问题,采用现场地质调查、理论计算和现场监测相结合的方法,分析了围岩变形特征和巷道失稳破坏的原因,在此基础上,依据深井巷道承压环强化支护理论,提出了基于钢管混凝土支架的高强度复合支护形式:支架断面设计为弧墙半圆拱形,主体钢管选用194 mm×8 mm无缝钢管,充填C40钢纤维混凝土,辅助锚网喷支护和围岩加固注浆。研究结果表明:该支护体系能够给围岩提供0.93 MPa以上的支护反力,可有效抑制围岩向巷道空间内移动,支护稳定后,巷道围岩最终变形量小于150 mm,满足巷道变形要求;围岩结构的非对称性会导致围岩产生非对称变形,应结合支架承载力监测数据加强对变形关键部位的控制。In order to solve the large surrounding rock deformation value and long sustained deformation time problems occurred in a sup- port process of -1 100 meters level roadway in Huafeng Mine, a site geological survey, theoretical calculation and site monitoring and meas- uring combined method was applied to analyze the surrounding rock deformation features and roadway stability lost and failure causes. Based on the circumstances, according to the pressure bearing ring strengthened support theory, the paper provided a high strength compos- ite support method based on the steel tube concrete support.The cross section of the support designed was a semi arch support in an arc form wall.The main frame steel tube was selected with 0194 mm×8 mm seamless steel tube and was filled with C40 steel fiber concrete.The bolt-mesh-anchor supporting and surrounding rock reinforced grouting were applied as the auxiliary support.The study results showed that the support system could provide a support counterforce over 0.93 MPa to the surrounding rock and could effectively restrain the movement of the surrounding rock forward to the space of the roadway. After the support stabilized, the final deformation value of the surrounding rock along the roadway was less than 150 mm and could meet the deformation requirement of the roadway.An asymmetry of the surrounding rock structure could cause an asymmetric deformation of the surrounding rock. In combination with the loading force monitoring and measured data of the support, a control of the deformation key part should be enhanced.

关 键 词：钢管混凝土支架 深井巷道 动压巷道 承压环理论 

分 类 号：TD353[矿业工程—矿井建设]