采矿与安全工程学报2016，Vol.33Issue(3)：475-480,6.DOI:10.13545/j.cnki.jmse.2016.03.015
综放沿空掘巷护巷窄煤柱留设宽度优化设计研究
Width optimization of narrow coal pillar of roadway driving along goaf in fully mechanized top coal caving face
摘要
Abstract
The width of the narrow coal pillar of roadway driving along goaf is the key factor affecting the surrounding stability of the mining roadway in fully mechanized top coal caving face. Based on the abutment pressure distribution characteristics and the ultimate balanced theory, the reasonable width of narrow coal pillar should be chosen between 4.1m and 7.2 m, combined with the engineering condition in workface 3309 of a mine in Shandong. In order to optimize the width of the narrow coal pillar, the effect of plastic area distributions and stress distribution characteristics of the two sides of coal pillar under conditions of different width of narrow coal pillar have been studied by numerical analysis. The optimal width of coal pillar is 5 m. The validity of the optimal coal pillar width was verified by the en-gineering practice in workface 3309. Field monitoring has indicated that the surrounding rock defor-mation of the mining roadway could meet the requirements of safety production.关键词
综放沿空掘巷/护巷窄煤柱/极限平衡理论/围岩稳定性Key words
roadway driving along goaf/narrow coal pillar/limit equilibrium theory/surrounding rock stability分类
矿业与冶金引用本文复制引用
祁方坤,周跃进,曹正正,张奇,李宁..综放沿空掘巷护巷窄煤柱留设宽度优化设计研究[J].采矿与安全工程学报,2016,33(3):475-480,6.基金项目
国家自然科学基金项目(51374201,51323004)；国家重点基础研究发展计划(973)项目(2013CB227900)；江苏省普通高校研究生科研创新计划项目(KYLX15_1407)；中国矿业大学大学生创新项目(201507) （51374201,51323004）
