深部矿井锚拉支架设计理论及应用  

DESIGN PRINCIPLE FOR TRUSS-BOLT SYSTEM AND ITS APPLICATION TO DEEP COAL MINE ROOF REINFORCEMENT

作　　者：刘波[1] 杨仁树[1] 何满潮[1] 岳中琦[2] 张定春[1] 

机构地区：[1]中国矿业大学(北京校区)力学与建筑工程学院,北京100083 [2]香港大学土木工程系

出　　处：《岩石力学与工程学报》2005年第16期2875-2881,共7页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金重大项目(54902703);国家自然科学基金资助项目(50304012);教育部优秀青年教师教学科研奖励计划资助项目(2000–91)

摘　　要：论述基于锚拉支架综合抗力的理论设计方法,研究锚杆轴向拉伸与横向阻抗的非线性综合抗力,得出拉杆预紧力的下限和上限值、锚杆锚固力下限值的计算方法及设计理论公式。编制了煤矿锚拉支架的优化设计程序,且在我国最大深井之一的孙村煤矿-1100m水平(埋深1310m)巷道支护工程进行了应用,实测结果表明:设计安全经济、理论有效可靠。From the view of the safety and economical problems, the controlling of stability for fractured surrounding rock roof is one of the principal problems for deep underground coal mining engineering. A theoretical design method of the truss-bolt system for reinforcing underground fractured rock roof in coalmines is presented. The mechanical analysis of the system is considered in the models for the tie-rods and inclined roof bolts as well as three upper and lower bounds. The arching actions exerted by lateral behavior of the inclined bolts in reinforcing cracked roof are analyzed. The global-resistance concerning the lateral and axial behaviors of the inclined bolts in a truss-bolt-supported roadway is examined by using the classical theory of nonlinear beam under bending and tension. Based on the mechanical models, the design formulas concerning the lateral forces of bolts,tensions of tie-rod in truss system are given; and the reinforcement behaviors have been proposed. The analytical formulas for both lower and upper bounds for truss pre-tightening forces are put forward. Furthermore, the analytical equations for designing axial forces and dimensions of bolts in the system are presented. In order to make the truss-bolt design intelligent and effective, computer-aided design （CAD） software codes for coalmine truss-bolt reinforcement are developed. A case study for Suncun coal mine roadway supporting engineering is presented. This coalmine is considered as one of the deepest underground coal mining projects with buried depth of 1 310 m in China. The in-situ tests show that the fractured roof is reinforced effectively： and the validity of study is proved.

关 键 词：岩石力学 锚拉支架系统 理论设计方法 锚杆综合抗力 深部煤矿 应用 

分 类 号：TD353.6[矿业工程—矿井建设]