煤炭工程 ›› 2026, Vol. 58 ›› Issue (8): 53-59.doi: 10.11799/ce202608008

• 施工技术 • 上一篇    下一篇

深部高应力矿井坚硬顶板磨砂射流轴向切顶防冲技术

陈云民,缪小冬,苏士杰,孙如达,夏永学   

  1. 1. 中天合创能源有限责任公司,内蒙古 鄂尔多斯 017010

    2. 中煤科工开采研究院有限公司,北京 100013

    3. 天地科技股份有限公司 开采设计事业部,北京 100013

  • 收稿日期:2025-07-23 修回日期:2025-12-24 出版日期:2026-08-15 发布日期:2026-08-31
  • 通讯作者: 孙如达 E-mail:756987810@qq.com

Research on the Precise Hydraulic Roof Cutting and Impact Prevention Technology in Hulusu Coal Mine

  • Received:2025-07-23 Revised:2025-12-24 Online:2026-08-15 Published:2026-08-31
  • Contact: da RuSUN E-mail:756987810@qq.com

摘要:

针对鄂尔多斯深部矿区高应力条件下坚硬顶板工作面冲击地压频发的问题,以内蒙古葫芦素煤矿为工程背景,采用理论分析、数值模拟与现场试验相结合的方法,开展厚硬顶板诱冲机理及防控技术研究。通过数值模拟揭示大采深高应力环境下顶板冲击地压诱发机制;引入磨砂射流轴向切顶技术,开展割缝与压裂关键工艺参数工业试验,依托钻孔窥视与微震监测,对比磨砂射流切顶与传统爆破两种卸压方案,对施工及回采过程进行效果检验。结果表明:宽煤柱高静载应力、侧向悬顶积聚大量弹性能、工作面超前支承压力及采掘空间局部异常应力叠加,是诱发冲击地压的主要因素;现场试验确定割缝压力45~50MPa、割缝时长不低于10min,压裂压力35~40MPa、压裂时长30min,可实现有效定向切顶;相比常规爆破卸压,磨砂射流轴向切顶可降低回采阶段顶板活动性,实现弹性能平稳释放,缓解相邻掘进巷道顶板大变形,显著改善巷道维护效果。

关键词: 深部矿井, 冲击地压, 厚硬顶板, 水力压裂, 精准切顶

Abstract:

In response to the frequent occurrence of rock burst in the hard roof working face under high stress conditions in the deep mining area of Ordos, a case of rock burst in the deep high-stress mine of Hulusu Coal Mine in Inner Mongolia was selected. The mechanism of rock burst induced by the hard roof under the conditions of deep mining and high stress in Hulusu Coal Mine was analyzed. In order to explore new methods for dealing with the hard roof, the abrasive jet axial cutting technology for the hard roof was introduced. Industrial tests were carried out to determine the key technical parameters of abrasive jet axial cutting and fracturing, and engineering practices for preventing rock burst under the conditions of hard roof were carried out. The implementation process and the effect during the mining process were inspected by using borehole inspection and microseismic monitoring methods. The research results show that the high stress in the wide coal pillar, the large amount of elastic energy accumulated in the lateral suspended roof, the advanced support pressure of the mining face, and the abnormal stress in the mining space area are the main factors inducing rock burst. The process parameters of abrasive jet axial cutting were determined through the test: cutting pressure of 45-50 MPa, cutting time of no less than 10 minutes, fracturing pressure of 35-40 MPa, and fracturing time of 30 minutes. Compared with blasting pressure relief, after the abrasive jet axial cutting of the hard roof, the activity of the surrounding rock in the mining face during the mining period is reduced, the release of elastic energy is stable, and the large deformation of the surrounding rock in the adjacent tunneling face is mitigated, which is beneficial to the maintenance of the tunneling face during the tunneling period.

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