深部沿空掘巷窄煤柱宽度留设及围岩控制技术研究

doi:10.19286/j.cnki.cci.2023.05.002

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Abstract No.11214 transport roadway of Xingdong Mine was taken as the background, the internal and external stress field theory, limit equilibrium zone theory, and engineering practice were applied to determined the reasonable width of narrow coal pillar in gob-side roadway excavation with great depth. The surrounding rock control technology of “full threaded bolt support of roadway sides + super strong bolt support for the roof + cold-drawn wire metal mesh with diamond-shaped metal mesh double network protection + steel strand anchor cable reinforcement support” was put forward. Theoretical calculations showed that the reasonable width range of narrow coal pillars was 6.47 ~ 9.77 m, which was finally determined to be 8 m. Engineering practice showed that 8 m width narrow coal pillar and surrounding rock control technology could effectively control the deformation of the gob-side entry driving, the roadway deformation tended to stabilize after 35 d of roadway excavation, the maximum deformation of top and bottom slab, coal pillar wall and solid coal wall, at stabilization were 67 mm, 57 mm, 64 mm and 62 mm respectively, the deformation was within a reasonable range, the rock around the roadway was well controlled and met the requirements of safe production.

Key words： deep mine narrow coal pillar gob-side roadway excavation surrounding rock control coal pillar size

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Zhang Jianzhong. Study on narrow coal pillar width setting and surrounding rock control of gob-side roadway excavation in deep coal mine[J]. CCI, 2023, 46(5): 4-8.

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http://www.mtyhg.com.cn/EN/10.19286/j.cnki.cci.2023.05.002 OR http://www.mtyhg.com.cn/EN/Y2023/V46/I5/4

1 ] 柏建彪，侯朝炯，黄汉富. 沿空掘巷窄煤柱稳定性数值模拟研究[ J ]. 岩石力学与工程学报，2004（ 20 ）：3 475 - 3479. [ 2 ] 李磊，柏建彪，王襄禹. 综放沿空掘巷合理位置及控制技术[ J ]. 煤炭学报，2012，37（ 9 ）：1 564 - 1 569. [ 3 ] 张科学，姜耀东，张正斌，等. 大煤柱内沿空掘巷窄煤柱合理宽度的确定[ J ].采矿与安全工程学报，2014，31（ 2 ）：255 - 262，269. [ 4 ] 王猛，柏建彪，王襄禹，等. 迎采动面沿空掘巷围岩变形规律及控制技术[ J ]. 采矿与安全工程学报，2012，29（ 2 ）：197 - 202. [ 5 ] 柏建彪，王卫军，侯朝炯，等. 综放沿空掘巷围岩控制机理及支护技术研究[ J ]. 煤炭学报，2000（ 5 ）：478 - 481. [ 6 ] 康红普. 深部煤矿应力分布特征及巷道围岩控制技术[ J ]. 煤炭科学技术，2013，41（ 9 ）：12 - 17. [ 7 ] 袁亮，薛俊华，刘泉声，等. 煤矿深部岩巷围岩控制理论与支护技术[ J ]. 煤炭学报，2011，36（ 4 ）：535 - 543. [ 8 ] 陈冬冬，何富连，谢生荣，等. 弹性基础边界基本顶板结构周期破断与全区域反弹时空关系[ J ]. 岩石力学与工程学报，2019，38（ 6 ）：1 172 - 1 187. [ 9 ] 陈冬冬，谢生荣，何富连，等. 长边两侧采空（煤柱）弹性基础边界基本顶薄板初次破断[ J ]. 煤炭学报，2018，43（ 12 ）：3 273 - 3 285. [ 10 ] 谢生荣，陈冬冬，曾俊超，等. 考虑两侧煤柱与弹性煤体基础的基本顶板初次破断特征[ J ]. 煤炭学报，2019，44（ 1 ）：115 - 126. [ 11 ] 谢生荣，陈冬冬，曾俊超，等. 基本顶板结构初次破断与全区域反弹时空关系[ J ]. 煤炭学报，2019，44（ 9 ）：2 650 - 2 663. [ 12 ] 祁方坤，周跃进，曹正正，等. 综放沿空掘巷护巷窄煤柱留设宽度优化设计研究[ J ]. 采矿与安全工程学报，2016，33（ 3 ）：475 - 480. [ 13 ] 侯朝炯，马念杰. 煤层巷道两帮煤体应力和极限平衡区的探讨[ J ]. 煤炭学报，1989（ 4 ）：21 - 29. [ 14 ] 祁方坤，周跃进，曹正正，等.综放沿空掘巷护巷窄煤柱留设宽度优化设计研究[ J ].采矿与安全工程学报，2016，33 （ 4 ）：475-480，508.