棚索协同支护锚索间距理论研究与应用  

Theoretical research and application on anchor cable space of synergetic support for U-shaped shed and anchor cable

作　　者：张宏学[1,2] 张继华[1,2] 姚卫粉[2] 卢小雨[2] 王运臣 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,力学与建筑工程学院,江苏徐州221116 [2]安徽理工大学理学院,安徽淮南232001 [3]中煤第三建设集团有限责任公司二十九工程处,安徽宿州234000

出　　处：《采矿与安全工程学报》2014年第4期593-600,共8页Journal of Mining & Safety Engineering

基　　金：安徽省自然科学基金项目(1308085ME74)

摘　　要：为了确定U型钢支架和锚索协同支护系统中锚索的合理间距,分别建立了U型钢支架以及U型钢支架和锚索协同支护的力学模型,采用力法原理对力学模型进行分析,确定了棚索协同支护系统中锚索的间距。计算结果表明:棚索协同支护锚索的间距与侧压力系数、巷道的断面尺寸和埋深有关。建立了松散煤体侧压力系数的解析表达式,对U型钢支架和锚索协同支护进行数值模拟。模拟结果表明:棚索协同支护系统中锚索的合理间距显著地减小了巷道围岩的变形量、塑性区的面积以及U型钢支架的最大弯矩,实现了U型棚与围岩之间以及锚索与深部围岩之间的耦合支护。实践表明:采用锚索和工字钢对U型钢支架的各关键部位进行加固,能够有效地控制巷道围岩的稳定性,保证煤矿的安全生产。In order to determine rational space between U-steel support and anchor cable in synergetic support system, the mechanical models of U-steel support and synergetic support for U-steel support and anchor cable have been established respectively. Anchor cable space in synergetic support has been determined by analyzing mechanical model based on principle of force method. It is studied that the anchor cable space in synergetic support for U-steel support and anchor cable relates to lateral pressure coefficient, the section size and burial depth of roadway. The analytical expression for lateral pressure coefficient of loose coal has been established. Furthermore, the synergetic support of U-steel support and anchor cable have been simulated. The result shows that deformation and plastic zone of surround-ing rock in roadway and maximum bending moment of U-steel support are decreased notably due to reasonable spacing of anchor cable in synergetic support system of U-shaped shed and anchor cable, which achieves coupling support of U-shaped shed and surrounding rock as well as anchor cable and＆nbsp;deep surrounding rock. The engineering practice shows that safety production in coal mine is guaranteed because of controlling the stability of surrounding rock of roadway effectively after reinforcing each key position of U-steel support by adopting anchor cable and joist steel.

关 键 词：软岩巷道 U型棚 协同支护 锚索间距 侧压力系数 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]