煤矿安全2018，Vol.49Issue(2)：199-201,205,4.DOI:10.13347/j.cnki.mkaq.2018.02.053
大型综放工作面沿空巷道窄煤柱合理宽度确定
Rational Narrow Pillar Width of Gob-side Entry Retaining of Large Fully Mechanized Caving Face
摘要
Abstract
The instability and failure of coal pillar along gob-side entry is a typical nonlinear process.The cusp catastrophic model is obtained on the basis of the mechanical model of coal pillar system.Then,the formula of critical width for instability and failure of coal pillar is obtained.The results show that the critical width of coal pillar depends on the external factors such as the depth,the coal pillar height,the internal friction angle and cohesion,the stress concentration factor,the lateral pressure coefficient,the entry width as well as supporting intensity of coal rib.Based on the critical width of coal pillar,a safety factor is introduced to determine the rational width of narrow coal pillar.Finally,the feasibility of the method is verified by an engineering case.关键词
窄煤柱/尖点突变理论/临界宽度/合理宽度/沿空巷道/煤柱破坏失稳Key words
narrow coal pillar/cusp catastrophic theory/critical width/rational width/gob-side entry/coal pillar instability and failure分类
矿业与冶金引用本文复制引用
何富连,来永辉,肖鹏,张亮杰..大型综放工作面沿空巷道窄煤柱合理宽度确定[J].煤矿安全,2018,49(2):199-201,205,4.基金项目
国家自然科学基金面上资助项目(51574243) （51574243）
中央高校基本科研业务费专项资金资助项目(2010YZ02) （2010YZ02）
