岩土工程学报2012，Vol.34Issue(8)：1501-1508,8.
深井复合顶板煤巷变形机理及控制对策
Deformation mechanism and control technology of coal roadway under deep well and compound roof
摘要
Abstract
According to large deformation problems of compound-roof coal roadway under high stress, Qujiang Coal Mine in Jiangxi Province is taken as an example, and field survey, theoretical analysis and industrial test are performed. At first, the field survey shows that the mine has features of a typical three-high mine. Because the top anchors and side cables can be brought into full play, the whole supporting system of roadway loses balance and fails. Then, the mechanical function of the coal roadway is studied. It is concluded that the mechanical function is a gradual process, its deformation power comes from roof pressure, and the large deformation of floor is an important failure symbol. Moreover, on the basis of stress characteristics, it is suggested that the roof should be taken as the key supporting part, its integrity should be maintained, and the self-bearing ability of strata should be improved. The comprehensive control technology with the main body of prestress truss and anchor rope and the accessory body of cable ＋ anchor ＋ mesh reinforcement is proposed. Practice shows that the deformation of a supported roadway by means of the comprehensive control technology is markedly improved. The monitoring indicates that the relative convergence rate of sides is less than 1.7 mm/d after 91 days, and the relative convergence rate between roof and floor is greatly reduced, with the maximum value being 297 mm and the rate being less than 1.4 mm/d. So, the whole roadway is in stable status.关键词
深部高应力/煤巷/复合型顶板/变形机理/控制技术Key words
deep high stress/coal roadway/compound roof/deformation mechanism/control technology分类
矿业与冶金引用本文复制引用
余伟健,王卫军,文国华,张农,吴海,张永青..深井复合顶板煤巷变形机理及控制对策[J].岩土工程学报,2012,34(8):1501-1508,8.基金项目
国家自然科学基金项目 （）
煤矿安全开采技术湖南省重点实验室开放基金项目 （）
湖南省自然科学基金项目 （）
湖南省教育厅资助项目 （）
