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主办单位:煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
王坡煤矿碎软煤层气动定向高效成孔工艺研究
  • Title

    Application of pneumatic directional and efficient pore-forming technology for crushed soft coalbed methane in Wangpo Coal Mine

  • 作者

    赵会波李雨成

  • Author

    ZHAO Huibo;LI Yucheng

  • 单位

    太原理工大学山西天地王坡煤业有限公司

  • Organization
    Taiyuan University of Technology
    Shanxi Tiandi Wangpo Coal Industry Co., Ltd.
  • 摘要

    针对王坡煤矿碎软煤层区域瓦斯治理的需求,对现有气动定向钻进工艺及装备进行优化升级。通过对气动螺杆钻具升级改造,将额定扭矩提升至450 N·m以上;研制的89 mm低风阻螺旋通缆钻杆配套有线通缆测量系统,施工孔深提升至300 m以上;基于“波浪式”精准探测煤层顶底板钻孔轨迹工艺,从侧钻开分支原理出发,改进钻具造斜强度实现快速开分支;系统性分析气动定向工艺在不同地层钻进时轨迹变化特点,形成精准轨迹控制技术,大幅提升施工效率。现场试验期间,共计完成34个主孔,49个分支孔,总进尺17287 m,平均成孔深度350 m,平均日进尺103 m/d,最高154 m/d,钻孔平均瓦斯抽采体积分数60%以上,百米钻孔抽采纯量是邻近区域普通钻孔2.7倍。

  • Abstract

    According to the demand of regional gas control in Wangpo Coal Mine crushed soft coal seam area, the pneumatic directional drilling technology was introduced to optimize the existing pneumatic directional drilling process and equipment. Through upgrading the pneumatic screw drilling tool, the rated torque was increased to more than 450 N·m. The 89 mm spiral cable drilling pipe with low wind resistance was developed to realize the construction hole depth of the connected cable measuring system of pneumatic directional drilling to more than 300 m. Based on the tecnique of the “wave type” accurate detection of coal seam top and bottom trajectory, from the principle of directional drilling and branching, the technology of rapid branching is realized by improving the strength of drilling tool. We systematically analyzed pneumatic directional drilling in different strata trajectory variation characteristics, summed up the precise trajectory control technology, and the pneumatic directional drilling process construction efficiency is greatly improved. During the field test, a total of 34 main holes and 49 branch holes were constructed, with a total footage of 17 287 m, an average hole depth of 305 m, an average daily footage of 103 m/d and a maximum of 154 m/d. The average extraction concentration of the borehole was above 60%, and the pure extraction volume of the 100-meter borehole was 2.7 times that of the ordinary borehole in the adjacent area.

  • 关键词

    气动定向钻进工艺气动螺杆钻具低风阻螺旋通缆钻杆精准轨迹控制快速开分支

  • KeyWords

    pneumatic directional drilling technology;pneumatic screw drilling tool;low wind resistance spiral cable drill pipe;precise trajectory control;fast branching

  • DOI
  • 引用格式
    赵会波,李雨成. 王坡煤矿碎软煤层气动定向高效成孔工艺研究[J]. 煤矿安全,2024,55(4):48−54.
  • Citation
    ZHAO Huibo, LI Yucheng. Application of pneumatic directional and efficient pore-forming technology for crushed soft coalbed methane in Wangpo Coal Mine[J]. Safety in Coal Mines, 2024, 55(4): 48−54.
  • 图表
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    • 新型支撑挡环实物图

    图(7) / 表(3)

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