矿山地面救援应急响应与大直径钻孔关键技术

Key technologies of emergency response and large diameter borehole for mine surface rescue

  • 摘要:目的】大直径救生孔多次在矿山地面钻探救援中得到成功应用,但在快速出动、跨区域救援等应急响应方面仍有短板,在应对复杂地层时大直径救生孔的工艺适配性不足。【方法】从应急救援整体角度出发,以救援时效为指标,就响应能力提升、复杂地层成井工艺等关键技术进行总结。构建了矿山地面钻探救援应急处置流程,明确了预案启动、响应动作和响应速度3个方面的提升内容,建立了跨区域救援层次化出动机制和钻前技术保障响应机制。分析了大直径救生孔松散层、基岩层钻进工艺特点,提出了针对破碎、高涌水等复杂地层施工难点的解决方案,指出了救援提升过程中的典型问题。【结果和结论】研究表明:(1)科学的矿山地面钻探救援应急响应机制是提高救援效率的重要方式之一,通过采用跨区域救援层次化出动机制和钻前技术保障响应机制,可有效提高应急响应效率2.3倍。(2)形成了复杂地层条件下大直径救生孔高效成井的解决方案,应用于济宁九顶山矿大直径救生孔工程试验,完钻孔深403.2 m,终孔孔径580 mm,平均机械钻速2.5 m/h,从应急响应到救援提升总用时311.95 h,救援整体时效性提升47%。(3)就救援时效性而言,救援准备阶段的提升效率要优于救援实施阶段,且应急响应能力的提升途径更易实现,因此在钻探工艺和装备提升不大的情况,矿山救援队应着重提升应急备战和快速反应能力。研究结果可满足400 m以浅矿山应急救援需求,可指导矿山救援队建立应急响应机制,为大直径救生孔的施工设计提供参考,对矿山地面钻探应急救援具有指导意义。

     

    Abstract: Objective Large diameter lifesaving holes have been successfully applied multiple times in emergency rescue operations of surface mining drilling. However, there are still shortcomings in rapid deployment and cross-regional rescue, and the technological adaptability of large diameter lifesaving holes in coping with complex strata is insufficient. Methods From the perspective of emergency rescue as a whole, focusing on rescue efficiency, key technologies such as enhancing response capabilities and adapting drilling techniques for complex strata were summarized. An emergency response process for surface mining drilling rescue was constructed, specifying improvements in contingency plan activation, response actions, and response speed. Hierarchical cross-regional rescue mobilization mechanisms and pre-drilling technical support response mechanisms were established. The drilling process characteristics of loose strata and bedrock layers for large diameter lifesaving holes were analyzed, proposing solutions for construction challenges in complex strata such as fragmentation and high water inflow, and identifying typical issues in rescue enhancement processes. Results and Conclusions The study demonstrates that: (1) A scientific emergency response mechanism for surface mining drilling rescue is one of the important ways to improve rescue efficiency, by adopting hierarchical cross-regional rescue mobilization mechanisms and pre-drilling technical support response mechanisms, emergency response efficiency can be effectively increased by 2.3 times. (2) An efficient well construction solution for large diameter lifesaving holes under complex strata conditions has been developed and applied in the experimental project of Jiuding Mountain Mine in Jining, achieving a final hole depth of 403.2 m, a hole diameter of 580 mm, and an average mechanical drilling speed of 2.5 m/h. The total time from emergency response to rescue enhancement was reduced to 311.95 hours, improving overall rescue timeliness by 47%. (3) In terms of rescue timeliness, efficiency improvements in the rescue preparation phase are superior to those in the implementation phase, and enhancing emergency response capabilities is more achievable. Therefore, mining rescue teams should focus on improving emergency preparedness and rapid response capabilities, even when drilling techniques and equipment enhancements are limited. The research results meet the emergency rescue needs of mines shallower than 400 m, provide guidance for mining rescue teams to establish emergency response mechanisms, offer references for the construction design of large diameter lifesaving holes, and have significant guiding implications for emergency rescue in surface mining drilling.

     

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