采矿与安全工程学报2012，Vol.29Issue(3)：322-327,6.
“三软”薄煤层群沿空留巷区段上行式开采研究
Study on Upward Mining of Sublevels for Gob-Side Entry Retaining in Three-Soft Thin Coal Seam Group
摘要
Abstract
In this paper, to investigate the influence of different mining sequence of sublevels on gate-ways in conditions of gob-side entry retaining in three-soft thin coal seam group, we carried out nu-merical simulation study on the upward and downward mining sequences of sublevels respectively in the three-soft thin coal seam group with ultra-close distance in one coal mine of Southern Sichuan, based on the previous field investigation and analysis, shield supporting study and experimental deter-mination of rock mechanics parameters. The results show that extrusion and shear failures are occurred easily in the roadway roof and roof of higher side when the downward mining sequence of sublevels is used, and the rock packing of higher side has poor stability, while the vertical stress and shear stress of lower side in the range of 0.5m decrease 1 MPa at least during upward mining, compared with the for-mer mining sequence, and the produced horizontal stress can prevent the rock packing of lower side slip towards the gob side, which is beneficial to increase the initial strength of the rock packing.关键词
薄煤层群/沿空留巷/区段/开采顺序Key words
thin coal seam group/ gob-side entry retaining: sublevel/ mining sequence分类
矿业与冶金引用本文复制引用
曹树刚,邹德均,白燕杰,文德才,杨义刚,何平均..“三软”薄煤层群沿空留巷区段上行式开采研究[J].采矿与安全工程学报,2012,29(3):322-327,6.基金项目
国家自然科学基金项目(51074197) （51074197）
