采矿与安全工程学报2012，Vol.29Issue(2)：215-219,5.
沿空双巷合理煤柱宽度的数值模拟研究
Numerical Research on Reasonable Width of Coal Pillar in the Double Gob-Side Entries
摘要
Abstract
In order to maintain the stability of double gob-side entries of the 3405 fully-mechanized caving face at a coal mine, the reasonable coal pillar width of the double gob-side entries should be first determined. Based on the geological conditions, the FLAC3D was used to simulate the distribution law of stress, displacement and plastic zone in surrounding rock of the gob-side entries for coal pillar widths of 2, 4, 6, 8, 12, 20 m. The results show that as the width of gob-side pillar increases the vertical convergence of the entries first decreases, then rises and last decreases again, while the horizontal convergence initially rises and then decreases; when the width of pillar between two entries increases the surrounding rock displacement of the entries decreases on the whole; the peak stress and plastic zone of coal pillars first increase and then decrease with the rise of the pillar widths. After the comprehensive analysis of the simulation results both in technology, economy and effect, we know that the 4m wide coal pillars of both along gob side and between entries are reasonable for the double gob-side entries because the coal pillars are in low stress region and more coal can be mined. According to the findings, the double gob-side entries were excavated and supported with dynamic superposition technology, which successfully solved the supporting problem of the double gob-side entries.关键词
沿空双巷/数值模拟/综放开采Key words
double gob-side entries/ numerical simulation/ fully-mechanized caving mining分类
矿业与冶金引用本文复制引用
司鑫炎,王文庆,邵文岗..沿空双巷合理煤柱宽度的数值模拟研究[J].采矿与安全工程学报,2012,29(2):215-219,5.基金项目
国家自然科学基金项目(50490273) （50490273）
国家"十一五"科技支撑计划项目(2008BAB36B07) （2008BAB36B07）
