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| 微子镇矿小煤柱沿空掘巷合理位置及支护技术 |
| Rational Position and Support Technology of Small Coal Pillar Gob-side Entry Driving in Weizi Town Mine |
| 投稿时间：2023-09-03 修订日期：2023-11-12 |
| DOI： |
| 中文关键词: 小煤柱；沿空掘巷；巷道支护；数值模拟 |
| 英文关键词: small coal pillar; gob-side entry driving; roadway support; numerical simulation |
| 基金项目: |
| 作者 | 单位 | 邮编 | | 林兴 | 山西煤炭运销集团三元微子镇煤业有限公司 | 046000 | | 王涛* | 山西煤炭运销集团长治有限公司 | 046000 |
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| 摘要点击次数: 30 |
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| 中文摘要: |
| 针对微子镇矿区段煤柱留设宽度大造成资源浪费严重的问题，以15103工作面小煤柱沿空掘巷为工程背景，综合采用理论计算、数值模拟和工程实例相结合的方法展开研究.研究结果表明：15102工作面回采后采空区边缘应力降低区宽度为13.3m，当小煤柱宽度为7m时，沿空掘巷围岩应力集中情况趋于稳定.综合考虑经济安全效益，选择7m煤柱宽度作为施工条件，在15103回风顺槽掘进期间采用锚杆+锚索联合支护.矿压实测数据显示，巷道掘进期间围岩变形量较小，回采期间顶底板和两帮最大移近量分别为291mm和812mm，围岩变形处于可控范围，实现了小煤柱工作面安全高效回采. |
| 英文摘要: |
| In view of the problem of serious resource waste caused by the big coal pillar in Weizi Town Mine, taking the gob-side entry driving of small coal pillar in 15103 working face as the engineering background, the research is carried out by combining theoretical calculation, numerical simulation and engineering examples. The results show that the width of the stress reduction zone at the edge of the goaf after the mining of 15102 working face is 13.3 m.When the width of the small coal pillar is 7 m, the stress concentration of the surrounding rock of the gob-side entry tends to be stable. Considering the economic and safety benefits, the width of 7 m coal pillar is selected as the construction condition, and the combined support of bolt and anchor cable is adopted during the excavation of 15103 return air roadway. The data of mine compaction measurement show that the deformation of surrounding rock during roadway excavation is small, and the maximum displacement of roof and floor and two sides during mining is 291 mm and 812 mm respectively. The deformation of surrounding rock is in a controllable range, and the safe and efficient mining of small coal pillar working face is realized. |
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