矿山救援大直径多级跟管钻进关键工艺参数  

Critical technical parameters of large-diameter multi-stage casing drilling for mine rescue

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作  者:许超 姚宁平 姜磊[1] 田宏杰 刘智 朱宁 XU Chao;YAO Ningping;JIANG Lei;TIAN Hongjie;LIU Zhi;ZHU Ning(CCTEG Xi’an Research Institute(Group)Co.,Ltd.,Xi’an 710077,China;CCTEG China Coal Research Institute,Beijing 100013,China)

机构地区:[1]中煤科工西安研究院(集团)有限公司,陕西西安710077 [2]煤炭科学研究总院,北京100013

出  处:《煤田地质与勘探》2025年第4期235-242,共8页Coal Geology & Exploration

基  金:十四五国家重点研发计划项目(2022YFC3005905-4)。

摘  要:【目的】为满足矿山井下狭小空间内塌方事故救援需求,解决装备小型化与坍塌体混杂条件下大直径救援钻孔钻进之间的矛盾,根据60 m长距离救援通道构建目标,制定了混杂坍塌体内大直径水平救援钻孔多级跟管双动力复合钻进工艺,并开展关键钻进工艺参数研究,为救援装备功能开发和参数制定提供依据。【方法】为此,设计了配套三级大直径跟管套管及大直径螺旋钻杆,并进行了大直径跟管套管复合钻进力学分析,在此基础上建立了钻具运动及力学模型,分别分析一级、二级和三级大直径跟管套管在不同转速和机械钻速条件下的轴向摩擦阻力和摩擦力矩的变化规律。【结果和结论】结果表明:(1)大直径复合跟管钻进中,套管机械钻速和转速是影响套管轴向摩擦阻力和旋转摩擦力矩的主要控制因素。(2)根据跟管钻进套管摩阻规律,转速0~2 r/min复合跟管钻进时,少量的转速增加,便会引起轴向摩擦阻力显著降低,转速0~1.5 r/min范围内,少量的转速增加,便会引起旋转摩擦力矩快速增加。(3)基于跟管钻进套管摩阻规律分析,大直径跟管钻进工艺核心参数要求推进力≥2 000 kN,额定转矩≥5 000 kN·m,钻进过程中最大扭矩条件下套管最高转速≥1 r/min,保证套管回转实现较好的减阻效果。研究结果对于矿山井下救援钻机开发、钻进技术参数制定具有重要的参考和借鉴意义。[Objective] This study aims to meet the needs of mine rescue in cave-in accidents occurring in narrow underground spaces and to address the contradiction between equipment miniaturization and the drilling of large-diameter rescue boreholes under complex collapse conditions.Based on the goal of constructing a 60-m-long rescue passageway,this study developed a dual-power,composite drilling process based on multi-stage casing drilling technology for large-diameter horizontal rescue boreholes under complex collapse conditions.Furthermore,this study investigated the critical drilling parameters,aiming to provide a basis for the function development and parameter formulation of rescue equipment.[Methods] This study designed supporting three-stage large-diameter casings and large-diameter spiral drill rods,followed by a mechanical analysis of large-diameter casings in the composite casing drilling process.Accordingly,this study established a model for the movement and mechanical analysis of drilling tools.Using this mode,this study analyzed the variation patterns of the axial frictional resistance and frictional moment of the large-diameter first-,second-,and third-stage casings under varying rotational speeds and rates of penetration(ROPs).[Results and Conclusions] The results indicate that for large-diameter composite casing drilling,the ROP and rotational speed of casings were identified as the major factors influencing their axial frictional resistance and moment of frictional fraction.The variation patterns of the frictional resistance of casings in the composite casing drilling process indicate that,under rotational speeds ranging from 0 r/min to 2 r/min,a slight increase in the rotational speed led to a significant decrease in the axial friction resistance.In contrast,under rotational speeds ranging from 0 r/min to 1.5 r/min,a slight increase in the rotational speed induced a rapid increase in the moment of rotational friction.An analysis based on the law of casings' frictional resistance that critical parameters

关 键 词:矿山救援 大直径钻孔 跟管钻进 复合钻进 摩擦阻力 工艺参数 

分 类 号:TD771[矿业工程—矿井通风与安全]

 

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