煤炭工程 ›› 2023, Vol. 55 ›› Issue (3): 47-51.doi: 10.11799/ce202303009

• 施工技术 • 上一篇    下一篇

极松软易破碎综放面巷道“降钻锚注平”支护技术

朱乐章1,黄北海1,丁可2   

  1. 1. 淮北矿业股份有限公司
    2. 中国矿业大学
  • 收稿日期:2022-03-31 修回日期:2022-07-26 出版日期:2023-03-20 发布日期:2023-04-11
  • 通讯作者: 丁可 E-mail:441727877@qq.com

Study on "lowering, drilling, anchoring, grouting and leveling" support technology of roadway in extremely soft and fragile fully mechanized top coal caving face

  • Received:2022-03-31 Revised:2022-07-26 Online:2023-03-20 Published:2023-04-11
  • Contact: 丁可 丁可丁可 E-mail:441727877@qq.com

摘要: 针对淮北矿区8#煤层极松软易破碎综放面巷道支护技术难题,阐释了极松软易破碎综放面巷道支护失稳因素,基于支护-围岩协同作用机制,提出了以“巷道破底降帮+锚杆超前支护+锚索支护+超前注水注浆+平顶U型钢棚”支护为主的 “降钻锚注平”支护技术。在此基础上,结合淮北矿区信湖煤矿815机巷地质条件,研究设计了极松软易破碎综放面巷道“降钻锚注平”支护技术,现场试验结果表明:信湖煤矿815机巷从掘进开始到巷道趋于稳定,顶底板相对移近量值最大值为117 mm,两帮相对移近量值最大值为66 mm,巷道支护效果良好,能够有效地控制极松软易破碎综放面巷道围岩的大变形,大幅提升了掘进速度。

关键词: 极松软易破碎, 综放面巷道, 支护技术, 围岩稳定性

Abstract: In order to solve the problem of large deformation of surrounding rock under the conventional support condition of roadway in fully mechanized top coal caving face with extremely soft and easily broken coal seam in Huaibei mining area 8# seam, based on the support surrounding rock synergy mechanism, the "drilling, bolting and leveling" support technology of roadway in fully mechanized top coal caving face with extremely soft and easily broken coal seam is proposed, which is based on roadway bottom breaking and slope lowering + bolt advance support + anchor cable support + advance grouting + flat roof U-shaped steel shed support. It has been applied in Xinhu and Wobei coal 8# seams in Huaibei mining area. The field application shows that the roadway support effect is good after using the "drilling, anchoring and leveling" support technology, which can effectively control the large deformation of the roadway surrounding rock in the extremely soft and easily broken fully mechanized top coal caving face, and the tunneling speed has been greatly improved, which has great guiding significance for the props of the same type of roadway.

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