Directional drilling technology and equipment for gas drainage in large panel of underground coal mines

Authors

XU Chao, Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, ChinaFollow
JIANG Lei, Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China
CHEN Pan, Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China
ZHANG Di, Baode Coal Mine, Shendong Coal Group Co. Ltd., Baode 036600, China

Abstract

In recent years, with the progress of directional drilling technology and equipment in underground coal mines, a new model of advanced and comprehensive control of gas in the large panel of Baode Coal Mine is formed by covering the whole work with ultra-long directional drilling along the coal seam, hence the panel of the unexcavated roadway can be fully pre-pumped in advance to avoid gas overrun. As gas extraction in large panel requires a single construction along the coal seam borehole to run through the whole working face length, this paper starts from the construction technology of ultra-long directional drilling along the seam, introduces several key techniques of ultra-long directional drilling along coal seam, including progressive drilling trajectory extension technology, compound drilling trajectory control technology, hydraulic pressure drag reduction drilling technology, forward and reverse torsional drag reduction drilling technology and compound sidetracking branching technology and so on. It also introduces the main equipment for the construction of ultra-long directional drilling along coal seam, such as ZDY15000LD high power directional drill, BLY460/13 mud pump truck, YHD3-3000 mud pulse measuring system, wireless large hole drill pipe, hydraulic pressure screw motor and so on. The technology and equipment of ultra-long directional drilling for gas drainage along coal seam in large area are demonstrated and applied in the second block of Baode Mine. The application results show that this set of technology and equipment is capable of constructing ultra-long directional boreholes with a length of more than 3 300 m down the coal seam. Finally, the gas extraction effect is investigated, and the results show that the ultra-long directional borehole has a long extraction period and a high extraction amount, which can provide comprehensive gas management in the large pannl area in advance.

Keywords

directional drilling technology, directional drilling equipment, gas extraction, ultra-long drilling along the coal seam, large panel, underground coal mine

DOI

10.12363/issn.1001-1986.21.06.0348

Recommended Citation

XU Chao, JIANG Lei, CHEN Pan, et al. (2022) "Directional drilling technology and equipment for gas drainage in large panel of underground coal mines," Coal Geology & Exploration: Vol. 50: Iss. 4, Article 20.
DOI: 10.12363/issn.1001-1986.21.06.0348
Available at: https://cge.researchcommons.org/journal/vol50/iss4/20

Reference

[1] 胡千庭,蒋时才,苏文叔. 我国煤矿瓦斯灾害防治对策[J]. 矿业安全与环保,2000,27(1):1−4. HU Qianting,JIANG Shicai,SU Wenshu. Countermeasures for prevention and control of coal and gas outburst hazard in China’s coal mines[J]. Mining Safety and Environmental Protection,2000,27(1):1−4.

[2] 范启炜,王魁军,曹林. 我国煤矿瓦斯灾害事故频发的原因分析[J]. 中国煤炭,2003,29(7):9−11. FAN Qiwei,WANG Kuijun,CAO Lin. Analysis on the causes of frequent gas disasters in coal mines in China[J]. China Coal,2003,29(7):9−11.

[3] 程远平,付建华,俞启香. 中国煤矿瓦斯抽采技术的发展[J]. 采矿与安全工程学报,2009,26(2)−139127-139. CHENG Yuanping,FU Jianhua,YU Qixiang. Development of gas extraction technology in coal mines of China[J]. Journal of Mining and Safety Engineering,2009,26(2)−139127-139.

[4] 申宝宏,刘见中,张泓. 我国煤矿瓦斯治理的技术对策[J]. 煤炭学报,2007,32(7):673−679. SHEN Baohong,LIU Jianzhong,ZHANG Hong. The technical measures of gas control in China coal mines[J]. Journal of China Coal Society,2007,32(7):673−679.

[5] 郝世俊,段会军,莫海涛,等. 大直径高位定向长钻孔瓦斯抽采技术及实践[J]. 煤田地质与勘探,2020,48(6):243−248. HAO Shijun,DUAN Huijun,MO Haitao,et al. Gas drainage technology and practice analysis of large diameter high position directional long borehole[J]. Coal Geology & Exploration,2020,48(6):243−248.

[6] 王争,李国富,周显俊,等. 山西省废弃矿井煤层气地面钻井开发关键问题与对策[J]. 煤田地质与勘探,2021,49(4):86−95. WANG Zheng,LI Guofu,ZHOU Xianjun,et al. Key problems and countermeasures of CBM development through surface boreholes in abandoned coal mines of Shanxi Province[J]. Coal Geology & Exploration,2021,49(4):86−95.

[7] 李泉新,王鲜,许超,等. 瓦斯抽采顺煤层超长距定向孔钻进关键技术[J]. 煤炭科学技术,2020,48(12):168−174. LI Quanxin,WANG Xian,XU Chao,et al. Key technology of drilling with ultra–long–distance directional hole for gas drainage along coal seam[J]. Coal Science and Technology,2020,48(12):168−174.

[8] 石智军,董书宁,杨俊哲,等. 煤矿井下3 000 m顺煤层定向钻孔钻进关键技术[J]. 煤田地质与勘探,2019,47(6):1−7. SHI Zhijun,DONG Shuning,YANG Junzhe,et al. Key technology of drilling in–seam directional borehole of 3000m in underground coal mine[J]. Coal Geology & Exploration,2019,47(6):1−7.

[9] 石智军,李泉新,姚克. 煤矿井下1 800 m水平定向钻进技术与装备[J]. 煤炭科学技术,2015,43(2):109−113. SHI Zhijun,LI Quanxin,YAO Ke. Underground mine 1 800 m horizontal directional drilling technology and equipment[J]. Coal Science and Technology,2015,43(2):109−113.

[10] 李泉新,石智军,许超,等. 2 311 m顺煤层超长定向钻孔高效钻进技术[J]. 煤炭科学技术,2018,46(4):27−32. LI Quanxin,SHI Zhijun,XU Chao,et al. Efficient drilling technique of 2 311 m ultra–long directional borehole along coal seam[J]. Coal Science and Technology,2018,46(4):27−32.

[11] 石智军,许超,李泉新,等. 煤矿井下2 570 m顺煤层超深定向孔高效成孔关键技术[J]. 煤炭科学技术,2020,48(1):196−201. SHI Zhijun,XU Chao,LI Quanxin,et al. Key technology of high efficeiency hole formation for ultra deep directional hole with long 2 570 m along seam in underground coal mine[J]. Coal Science and Technology,2020,48(1):196−201.

[12] 许超,姜磊,王鲜,等. 顺煤层超长定向钻孔复合钻进摩阻规律研究[J]. 煤田地质与勘探,2021,49(5):265−271. XU Chao,JIANG Lei,WANG Xian,et al. Friction law of compound drilling along the coal seam with super–long directional drilling[J]. Coal Geology & Exploration,2021,49(5):265−271.

[13] 刘飞,许超,王鲜,等. 顺煤层超长定向钻孔钻压传递规律研究[J]. 工矿自动化,2019,45(8):97−100. LIU Fei,XU Chao,WANG Xian,et al. Research of weight on bit transmission law of ultra–long directional borehole along coal seam[J]. Industry and Mine Automation,2019,45(8):97−100.

[14] 王鲜,姜磊,李泉新,等. 超长定向钻孔滑动钻进减阻技术及其应用[J]. 煤矿安全,2020,51(11):117−120. WANG Xian,JIANG Lei,LI Quanxin,et al. Drag reduction technology of ultra−long directional drilling and its application[J]. Safety in Coal Mines,2020,51(11):117−120.

[15] 姜磊,许超,李泉新,等. 煤矿井下超深孔定向钻进扭摆减阻技术[J]. 煤矿安全,2020,51(11):113−116. JIANG Lei,XU Chao,LI Quanxin,et al. Torsional pendulum drag reduction technology for directional drilling of ultra deep hole in underground coal mine[J]. Safety in Coal Mines,2020,51(11):113−116.