深井巷道挠曲褶皱性底臌机理与控制技术  

Floor heave mechanism and control technology of flexural and folded deep mine roadway

作　　者：郑西贵[1,2] 刘娜[1,2] 张农[1,2] 花锦波[1,2] 冯晓巍[1,2] 

机构地区：[1]中国矿业大学矿业工程学院,江苏徐州221116 [2]中国矿业大学深部煤炭资源开采教育部重点实验室,江苏徐州221116

出　　处：《煤炭学报》2014年第3期417-423,共7页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(51104152);中央高校基本科研业务费专项资金资助项目(2011QNB02);长江学者和创新团队发展计划资助项目(IRT1084)

摘　　要：为研究巷道底臌的破坏机理,提高底板岩层的长期稳定和控制,保证矿井的运输生产正常,采用理论推导的方法,分析了巷道底板滑移线场、极限载荷和速度的运移演化特征,对大屯矿区千米深井层状岩体挠曲褶皱性巷道的底臌机理和控制手段进行了探讨。结果表明:巷道宽度和底板岩层内摩擦角是影响巷道底板应力区分布特征的主要因素,给合推导出的反底拱锚固梁力学模型可以对底板支护强度和锚固参数进行设计,可有效控制底臌。特别对于深井层状岩体巷道底板支护强度应达到0.4 MPa时,底板岩层可达到长时稳定,孔庄煤矿2 a期巷道底臌量小于10 mm,表明研究成果具有较强的可行性与实用性。In order to analyze fracture mechanism of floor heave in entry and to enhance the stability of strata under floor, thus further guarantee the normal transportation of coal mine, this paper made a research on the evolution law of stress slip-line field, ultimate load and speed, there also investigated the floor heave mechanism and countermeasures of fold-like entry in bedding stratum, which exists in Datun mining area. The results show that two main factors influence floor stress greatly, namely, width of the entry and frictional angle of strata, it also demonstrates that supporting strength and anchoring parameters can be designed scientifically with the help of deductive anti-heave mechanical model, whose controlling effects is impressively. Especially as to deep buried entry under the circumstance of bedding stratum, long- time stability can be obtained with the supporting strength more than 0.4 MPa, which is demonstrated effectively based on the two years monitoring period of Kongzhuang Mine, and floor heave less than 10 mm, either.

关 键 词：深井 挠曲褶皱性 底臌机理 层状岩体 反底拱 锚固梁 

分 类 号：TD322[矿业工程—矿井建设]