Coal Geology & Exploration


Aiming at the limitation of middle pressure air drilling for gas drainage in soft and broken coal seam, such as limited drill cutting removal capacity, and dust pollution, foam drilling technique research in underground coal mines was carried out. CFD simulation of the flow field during the drilling process was conducted to obtain the optimized drilling tool structure parameters for efficient drill cutting transportation. Optimal structural parameters of wide-blade milled auger drill rod with the number of heads 3, the groove width 26 mm, and the pitch 110 mm were determined. A foam perfusion system suitable for underground coal mining was developed. Field test applications show that foam drilling technique and assorted wide-blade milled auger drill rods have high efficiency of cutting transportation. Rotatory resistance was reduced in a range of 42%-48%. The technique can improve drilling depth in soft and broken coal seam and provide a reference for similar deep coal mine drilling construction.


foam drilling, gas drainage, efficient drilling cutting removal, auger drill rod




[1] 汪有刚. 高瓦斯矿井综放工作面瓦斯综合治理技术研究[J]. 煤炭工程,2018,50(10):106-108. WANG Yougang. Comprehensive gas control technology of fully-mechanized top-coal caving face in high gas mine[J]. Coal Engineering,2018,50(10):106-108.

[2] 方俊,李泉新,许超,等. 松软突出煤层瓦斯抽采钻孔施工技术及发展趋势[J]. 煤炭科学技术,2018,46(5):130-137. FANG Jun,LI Quanxin,XU Chao,et al.Construction technology and development tendency of gas drainage borehole in soft and outburst seam[J]. Coal Science and Technology,2018,46(5):130-137.

[3] 石智军,李泉新. 煤矿区钻探技术装备新进展与展望[J]. 探矿工程(岩土钻掘工程),2016,43(10):150-153. SHI Zhijun,LI Quanxin. New progress and prospect of drilling technology and equipment in coal mine areas[J]. Exploration Engineering(Rock & Soil Drilling Tunneling),2016,43(10):150-153.

[4] 刘新民,王力,王建利,等. 韩城桑树坪二号井松软煤层钻进技术研究与实践[J]. 煤田地质与勘探,2017,45(3):165-169. LIU Xinmin,WANG Li,WANG Jianli,el al. Research and practices on drilling in soft coal seams in Hancheng Sangshuping coal mine[J]. Coal Geology & Exploration,2017,45(3):165-169.

[5] 江巍巍. "三软"煤层采面瓦斯综合抽放技术研究[D]. 焦作:河南理工大学,2012. JIANG Weiwei. The study on gas comprehensive drainage technology of "three-soft" coal face[D]. Jiaozuo:Henan Polytechnic University,2012.

[6] 张镇,孙永新,付玉凯,等. 松软破碎煤体瓦斯抽采钻场预加固技术研究与应用[J]. 煤炭工程,2019,51(8):44-47. ZHANG Zhen,SUN Yongxin,FU Yukai,et al. Study and application of pre-reinforcement of soft and breaking coal mass in gas drainage drilling field[J]. Coal Engineering,2019,51(8):44-47.

[7] 殷新胜,刘建林,冀前辉. 松软煤层中风压空气钻进技术与装备[J]. 煤矿安全, 2012:43(7):63-65. YIN Xinsheng,LIU Jianlin,JI Qianhui. Medium wind pressure air drilling technique and equipments in soft coal seam[J]. Safety in Coal Mines, 2012:43(7):63-65.

[8] 陈礼仪. 泡沫及泡沫钻进技术的理论与实践[D]. 成都:成都理工大学,2004. CHEN Liyi. Theory and practices of foam and foamed drilling technology[D]. Chengdu:Chengdu University of Technology,2004.

[9] 熊正强,陶士先,李艳宁,等. 国内外冲洗液技术研究与应用进展[J]. 探矿工程(岩土钻掘工程),2016,43(5):6-12. XIONG Zhengqiang,TAO Shixian,LI Yanning,et al. Progress in research and application of flushing dluid technology both in China and abroad[J]. Exploration Engineering(Rock & Soil Drilling Tunneling),2016,43(5):6-12.

[10] 金永军. 泡沫冲洗液在松软煤层中钻进瓦斯抽放孔的应用[J]. 西部探矿工程,2003(11):100-101. JIN Yongjun. Application of foam drilling fluid for gas drainage borehole drilling in soft coal seams[J]. West-China Exploration Engineering,2003(11):100-101.

[11] 刘勇,殷新胜,刘建林. 松软煤层井下泡沫钻进工艺试验[J]. 煤田地质与勘探,2014,42(6):114-116. LIU Yong,YIN Xinsheng,LIU Jianlin. Underground foam drilling tests in soft seam[J]. Coal Geology & Exploration,2014,42(6):114-116.

[12] 祝效华. 气体钻井中的若干力学问题[M]. 北京:石油工业出版社,2017. ZHU Xiaohua. Mechanic challenges and solutions in gas drilling[M]. Bejing:Petroleum Industry Press,2017.

[13] 凌标灿,戴世鑫,曹承平,等. 三棱钻杆在中软煤层顺层瓦斯抽排钻孔的应用[J]. 煤炭科学技术,2009,37(10):44-46. LING Biaocan,DAI Shixin,CAO Chengping,et al.Application of triangular drilling rod to gas drainage borehole drilling in medium soft seam[J]. Coal Science and Technology,2009,37(10):44-46.

[14] 董昌乐,吴智峰. 富含FeS2结核松软突出煤层高效成孔技术与装备[J]. 煤田地质与勘探,2018,46(1):181-184. DONG Changle,WU Zhifeng. Highly efficient drilling technique and matched equipment for soft and outburst-prone coal seam rich in FeS2 nodules[J]. Coal Geology & Exploration,2017,46(1):181-184.

[15] 董昌乐,董萌萌,赵建国,等. 整体式螺旋钻杆的研制及应用[J]. 煤田地质与勘探,2016,44(5):164



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