采矿与安全工程学报2016，Vol.33Issue(3)：444-451,8.DOI:10.13545/j.cnki.jmse.2016.03.011
基于煤体微裂隙演化进程的综放窄煤柱煤巷非对称支护研究
Study on asymmetric support of coal roadway nearby narrow pillar based on microcracks evolution process in fully-mechanized caving mining
摘要
Abstract
To solve the controlling problems of the large deformation after the initial tunneling in coal roadway nearby narrow pillar, combined with the basic understanding of dynamic and static abutment pressure, the evolution process of microcracks was researched through CT scanning. Then, the asym-metric support technology of parallel-arranged composed of double truss cables and single cable was put forward, and its composition structure, controlling mechanism and stress field distribution charac-teristics were researched systematically. The research results have shown that 1) The numbers, devel-opment speed and penetration speed of microcracks are asymmetric on both sides of coal roadway; 2) The stress field distribution characteristics in the roof and coal pillar could be described as batwing ex-pansion along vertical direction, and more anchorage-body remains in a compression state in stress su-perposition areas. The parallel-arranged asymmetric support technology was successfully applied in roadway 120210 nearby narrow pillar. The deformations in the roof and coal sides are coordinated and the controlling effects are well. The research findings will have great theoretical and practical value to other projects with similar engineering geological conditions.关键词
动静支承压力/CT 扫描/双锚索桁架/非对称布置/应力扩展Key words
dynamic and static abutment pressure/CT scanning/double truss cable/asymmetric support/stress expansion分类
矿业与冶金引用本文复制引用
殷帅峰,何富连,程根银,赵勇强..基于煤体微裂隙演化进程的综放窄煤柱煤巷非对称支护研究[J].采矿与安全工程学报,2016,33(3):444-451,8.基金项目
中央高校基本科研业务费项目(3142015003)；国家自然科学基金项目(51404105)；河北省高等学校科学技术研究项目(QN2016333) （3142015003）
