煤炭工程 ›› 2020, Vol. 52 ›› Issue (9): 61-65.doi: 10.11799/ce202009013

• 生产技术 • 上一篇    下一篇

孤岛综放工作面三角煤失稳机理及控制技术

赵会波1,王涛2   

  1. 1. 中煤科工能源投资有限公司
    2. 天地科技股份有限公司开采设计事业部巷道所
  • 收稿日期:2020-05-25 修回日期:2020-06-11 出版日期:2020-09-15 发布日期:2020-11-24
  • 通讯作者: 王涛 E-mail:wanbvc@163.com

Instability Mechanism and Control Technology of Triangle Coal in Isolated Island Fully Mechanized Caving Face

  • Received:2020-05-25 Revised:2020-06-11 Online:2020-09-15 Published:2020-11-24

摘要: 针对王坡煤矿3210孤岛工作面回采过程三角区煤壁大面积垮塌等问题,通过理论分析、现场实测、工业试验等方法,分析了孤岛工作面超前支承应力影响范围和煤帮破坏深度,阐述了端头三角煤失稳破坏机理。为防治三角煤片帮、冒落采取合理注浆区域和注浆参数的选择提供依据,提出采用GRT-101化学注浆材料加固三角煤及其围岩,并在3210孤岛工作面进行工业性试验,取得了较好效果。

关键词: 孤岛工作面, 三角煤, 煤壁垮塌, 注浆加固, 化学浆

Abstract: In view of the large area collapse of the coal wall in the triangle area during the mining process of 3210 isolated island face in Wangpo coal mine, the influence range of the leading bearing stress and the failure depth of the coal wall in the isolated island face are analyzed, field measurement and industrial test, and the failure mechanism of the triangle coal at the end is expounded. In order to provide a basis for the selection of reasonable grouting area and grouting parameters for the prevention and control of triangular coal caving, grt-101 chemical grouting material is proposed to reinforce triangular coal and its surrounding rock. Based on this, industrial tests are carried out in 3210 isolated island working face, and good results are achieved.

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