采矿与安全工程学报2017，Vol.34Issue(5)：905-913,9.DOI:10.13545/j.cnki.jmse.2017.05.012
15 m特厚煤层综放高强度开采窄煤柱围岩控制研究
Research on surrounding rocks control of narrow pillar with high-intensity fully-mechanized top coal caving mining in 15 m ultra-thick coal seam
摘要
Abstract
In order to solve the problems of strong ground pressure and coal resource loss in Tashan Coal Mine due to retaining large coal pillar (38-45 m) to protect roadway with using fully-mechanized top coal mining for 15 m thick coal seam, the technology of gob-side entry driving with narrow coal pillar is put forward. Taking the 8204 fully-mechanized top coal mining face as an engineering case, by using theoretical calculations and borehole observation to ensure the location of the fracture line in the main roof is 4 m next to the gob. Meanwhile, based on the analysis of the structural stability of the arc triangular plate in front of the driving development head, the gob-side entry driving should be arranged out of the main roof fracture line and in the stress reduction area protected by the cantilever beam bal-ance structure. Then, the reasonable pillar width is determined to be as 6 m. Based on the difficulties of roadway surrounding rock control, the powerful combined supporting technology consists of high strength and pre-stressed yield-pressure bolt and anchor cable, multiple cable-belt truss, step anchored bundled anchor cable, grouting narrow pillar and gob reinforcement and reinforced concrete protective wall is proposed. The field test shows that the control effects of the surrounding rock is well by using the narrow coal pillar and powerful combined supporting technology.关键词
特厚煤层/综放沿空掘巷/窄煤柱/基本顶断裂线/煤柱宽度/强力联合支护Key words
ultra-thick coal seam/gob-side entry driving in fully-mechanized coal mining face/narrow pillar/main roof fracture line/pillar width/powerful combined supporting分类
矿业与冶金引用本文复制引用
岳帅帅,谢生荣,陈冬冬,郜明明,张群磊,张涛..15 m特厚煤层综放高强度开采窄煤柱围岩控制研究[J].采矿与安全工程学报,2017,34(5):905-913,9.基金项目
国家自然科学基金项目(51234005,51504259) （51234005,51504259）
中央高校基本科研业务费专项资金项目(2010QZ06) （2010QZ06）
