煤炭工程 ›› 2025, Vol. 57 ›› Issue (7): 95-101.doi: 10. 11799/ ce202507014

• 生产技术 • 上一篇    下一篇

顺层瓦斯抽采钻孔在防冲卸压中的应用

蒋军军   

  1. 1. 煤炭科学技术研究院有限公司,北京 100013

    2. 中国矿业大学(北京)能源与矿业学院,北京 100083

    3. 煤矿灾害防控全国重点实验室,北京 100013

    4. 北京市煤矿安全工程技术研究中心,北京 100013

  • 收稿日期:2024-06-20 修回日期:2024-09-01 出版日期:2025-07-11 发布日期:2025-08-14
  • 通讯作者: 蒋军军 E-mail:jiangjunjun21@163.com

Application of bedding gas extraction drillings in pressure relief for rockburst prevention

  • Received:2024-06-20 Revised:2024-09-01 Online:2025-07-11 Published:2025-08-14

摘要:

针对高瓦斯矿井冲击地压问题, 探讨瓦斯矿井顺层瓦斯抽采钻孔用于防冲卸压的工艺。研究结果表明: 抽采钻孔可以降低煤体应力环境, 但比大直径卸压钻孔卸压效果弱; 利用巷道围岩侧向应力分区特性, 改进抽采-卸压钻孔封孔工艺, 将单段封孔转化为双段封孔; 提出抽采-卸压工艺技术和卸压-抽采工艺, 并进一步应用于高瓦斯矿井回采工作面。现场试验结果可知, 施工抽采-卸压钻孔后, 微震事件最大能量平均降低4000J, 日平均能量平均降低1000J, 顶板活动程度明显减弱;两帮位移量减少300mm,顶底板移近量减少100mm,巷道围岩变形明显改善。从而验证顺层抽放钻孔能够达到回采空间煤层卸压作用,兼顾瓦斯抽采和冲击地压卸压功能, 真正实现一孔两用。

关键词:

瓦斯煤层 , 复合灾害 , 抽采钻孔 , 防冲卸压 , 耦合机制

Abstract:

As high gas mines gradually enter the realm of deep mining, the problem of rockburst has become increasingly prominent. In response to the problem of rockburst in high gas mines, the technology of anti- punching pressure relief by gas extraction borehole along stratum in gas mine is discussed. The research results indicate the followings. Extraction drilling can reduce the stress environment of coal. However, the pressure relief effect of gas drainage drilling is slightly weaker than that of large-diameter pressure relief drilling. By utilizing the lateral stress zoning characteristics of the surrounding rock of the roadway, improved sealing process of extraction and pressure relief drilling, the sealing section of the borehole is transformed from a single section sealing to a double section sealing. The extraction and pressure relief technology was established, and further applied to the high gas mine walking face. Field test results show the followings. After the construction of extraction and pressure relief drilling, the average maximum energy of microseismic events decreased by 4000J, the average daily energy decreased by 1000J, which indicated that the roof activity was significantly weakened. The displacement of the two sides was reduced by 300mm, the proximity of the top and bottom was reduced by 100mm, which indicated that the deformation of the roadway surrounding rock is obviously improved. This indicates that sequential drilling can achieve the pressure relief effect of the coal seam in the mining space, while also taking into account the functions of gas extraction and pressure relief from rock burst, truly achieving the dual use of one hole.

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