山东煤炭科技2025，Vol.43Issue(10)：19-23,5.DOI:10.3969/j.issn.1005-2801.2025.10.004
综放工作面窄煤柱沿空掘巷切顶卸压关键参数研究
Research on Key Parameters for Roof Cutting and Pressure Relief of Narrow Coal Pillar Roadway Excavation Along Goaf in Fully Mechanized Caving Face
苏传云 1桑万里 2何学明1
作者信息
- 1. 山西朔州平鲁区茂华东易煤业有限公司,山西 朔州 036800
- 2. 中国矿业大学,江苏 徐州 221116
- 折叠
摘要
Abstract
Aiming at the problem of determining the roof cutting and pressure relief parameters of narrow coal pillar roadway excavation along goaf of the 9202 fully mechanized caving face in Dongyi Coal Industry,through theoretical analysis and formula calculation,reasonable blasting and hole drilling parameters are determined,and a joint support method of"roof pre-splitting and pressure relief+narrow coal pillar support+effective support of collapsed rock mass"is proposed,a composite stable bearing structure of roadway-coal pillar-goaf surrounding rock is constructed.The results show that the length of the arc-shaped triangular block above the coal pillar plays a key role in the stress transmission of the roadway roof.When the blasting hole depth is set to 27 m and the blasting hole spacing is 0.5 m,the arc-shaped triangular block can be effectively cut,and the roadway surrounding rock stress can be reduced;The width of the coal pillar is reduced from 18 m to 8 m,narrow coal pillar roadway protection is successfully achieved;The deformation of the roadway surrounding rock is monitored by cross-point measurement method and roof lay separation instrument.The results indicate that the displacement amount of the roadway roof and floor is 100 mm,and the displacement amount of the two sides is 160 mm.The deformation amount of the surrounding rock is relatively small,achieving the expected effect.关键词
综放沿空掘巷/切顶卸压/预裂爆破/窄煤柱/围岩变形Key words
fully mechanized roadway excavation along goaf/roof cutting and pressure relief/pre-splitting blasting/narrow coal pillar/surrounding rock deformation分类
矿山工程引用本文复制引用
苏传云,桑万里,何学明..综放工作面窄煤柱沿空掘巷切顶卸压关键参数研究[J].山东煤炭科技,2025,43(10):19-23,5.
