煤炭工程 ›› 2023, Vol. 55 ›› Issue (3): 173-177.doi: 10.11799/ce202303031

• 装备技术 • 上一篇    下一篇

ZDY20000LK型钻机研制及应用

李旭涛,徐鹏博,邬迪   

  1. 1. 中煤科工西安研究院(集团)有限公司
    2. 中煤科工集团西安研究院有限公司
  • 收稿日期:2022-07-20 修回日期:2022-11-21 出版日期:2023-03-20 发布日期:2023-04-11
  • 通讯作者: 李旭涛 E-mail:413889632@qq.com

Application research of ZDY20000LK drilling rig in the construction of large diameter pressure relief borehole of coal side

  • Received:2022-07-20 Revised:2022-11-21 Online:2023-03-20 Published:2023-04-11

摘要: 为解决冲击地压矿井煤帮大直径卸压钻孔只能通过一次钻孔及多次扩孔施工工艺,才能达到预期卸压要求的问题,研发了ZDY20000LK型煤帮大直径卸压钻孔钻机,该钻机具备自动上、卸钻杆和800 m远控功能,能够提高工人施工时的安全性和降低工人劳动强度。此外,研究了钻机配套用260 mm大螺旋插接式钻杆和300 mm塔式PDC钻头,满足一次成孔直径300 mm的煤帮卸压钻孔要求。工业性试验表明:钻机平均钻进效率达到10 min/m,最大孔深81 m,充分验证了钻机结构、液压系统和远控系统的可靠性和稳定性。电磁波CT探测表明:大直径卸压钻孔,弱化了煤体,使得巷道支承压力区的煤体冲击危险性明显减小,且施工卸压钻孔的间距越小其卸压效果越好。研究成果对于大直径卸压钻孔装备的研制及冲击地压矿井卸压钻孔施工具有借鉴意义。

关键词: 自动化钻机, 远控系统, 冲击地压, 卸压钻孔, 电磁波CT探测

Abstract: ZDY20000LK large diameter pressure relief drilling rig is developed to solve the problem that the large diameter pressure relief drilling hole of coal bump can only meet the expected pressure relief requirements through the construction technology of one drilling hole and multiple reaming. The drill has the function of automatic loading and unloading drill pipe and 800m remote control. It can improve the safety and reduce the labor intensity of workers during construction. The project also studied the drilling rig with φ 260mm large spiral insert drill pipe and φ 300mm tower PDC bit, which can meet the requirements of coal side pressure relief drilling with a diameter of 300mm. The industrial test shows that the average drilling efficiency of the drill reaches 10min/m and the maximum hole depth is 81m, which fully verifies the reliability and stability of the rig structure, hydraulic system and remote control system. Electromagnetic CT detection shows that the large diameter pressure relief boreholes weaken the coal body, so that the impact risk of coal body in the abutment pressure area of the roadway is significantly reduced, and the smaller the spacing of pressure relief boreholes, the better the pressure relief effect. The research results can be used as reference for the development of large diameter pressure relief drilling equipment and the construction of rock burst pressure relief drilling.

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