煤矿安全2019，Vol.50Issue(7)：263-269,7.DOI:10.13347/j.cnki.mkaq.2019.07.062
倾斜煤层沿空掘巷窄煤柱稳定与宽度优化研究
Study on Stability and Width Optimization of Narrow Coal Pillars Along Gob of Fully Mechanized Caving Face in Inclined Coal Seam
摘要
Abstract
To study the stability and width optimization design of narrow coal pillars along the goaf of fully mechanized caving face in inclined seam, based on the analysis of the mine pressure around the coal pillars along the roadway and the empirical formula of the reasonable coal pillar width (5.61～12.46 m) of retaining roadway, FLAC3D simulation software was used to conduct numerical analysis and comparison of the stress field, displacement field and plastic zone distribution between the four coal pillar widths of 6, 8, 10 and 12 m without support. The result shows that the optimal retaining coal pillar width is 8.0 m. Therefore, based on the determination of the optimal retaining coal pillar width, the numerical analysis and comparison of the two supporting parameters are carried out by FLAC3D, and the optimum supporting parameter design of the 2214 return airway is determined, that is active and passive combined support technology of high strength anchoring cable and shotcreting I-beam shed.关键词
沿空掘巷/FLAC3D/护巷煤柱宽度/支护参数/主被动联合支护Key words
gob-side entry driving/FLAC3D/coal pillar width of retaining roadway/support parameters/active and passive combined support分类
矿业与冶金引用本文复制引用
王伟,王永峰,石国文,尹文怀,杨云飞..倾斜煤层沿空掘巷窄煤柱稳定与宽度优化研究[J].煤矿安全,2019,50(7):263-269,7.基金项目
国家自然科学基金资助项目(51674098) （51674098）
