砌碹巷道失稳机理及加固技术研究  

Instability Mechanism and Reinforcement Technology of Brickwork Roadway

作　　者：徐营[1] 柏建彪[1] 武增荣 冯金生[1] 

机构地区：[1]中国矿业大学矿业工程学院,深部煤炭资源开采教育部重点实验室,江苏徐州221116 [2]大同中煤矿业发展有限公司,山西大同037002

出　　处：《采矿与安全工程学报》2012年第6期790-796,826,共8页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51174195);中央高校基本科研业务专项资金项目(2010QNA31)

摘　　要：为了保证已失稳砌碹巷道的长期使用,采用理论分析和工程实践的研究方法,对其失稳机理及加固技术进行了研究。结果表明:由于受超挖、动压、地下水侵蚀等因素的影响,砌碹巷道容易产生拱顶壁后空洞或拱肩壁后空洞。当空洞发展到一定程度,砌碹结构与围岩的相互作用可使砌碹结构在局部产生大于砌碹抗压强度的弯曲压应力,进而导致砌碹巷道失稳。另外,基于改善砌碹结构受力状况、提高围岩强度和增大支护阻力所提出的壁后充填、围岩注浆和锚杆支护的综合加固技术对失稳砌碹巷道的控制效果良好。In order to extend the service life of the instable brickwork roadway, the instability mechanism and reinforcement technology were studied by analytical method and engineering practice. The results show that the vault wall back cavity or the spandrel wall back cavity are easily generated in the brickwork roadway because of the influence of over excavation, mining pressure, erosion of groundwater and so on. The interaction between brickwork structure and surrounding rock can make the bending compress stress in the local brickwork structure exceed the compress strength of the brickwork structure when the size of cavity reaches a level. This leads to instability of the brickwork roadway. In addition, the control effect of comprehensive reinforcement technology play an important role, which combined with wall back filling, grouting and bolt support based on amelioration of the brickwork support loading, improvement of surrounding rock strength and increment of the support resistance for the instable brickwork roadway.

关 键 词：砌碹 壁后空洞 支护阻力 注浆 锚杆支护 

分 类 号：TD322[矿业工程—矿井建设]