Research on three-stage automatic hole packer for gas extraction drilling in underground coal mine

Authors

WANG Qingfeng, China Coal Research Institute, Beijing 100013, China; China Coal Technology and Engineering Group Chongqing Research Institute, Chongqing 400039, China; State Key Laboratory of The Gas Disaster Detecting, Preventing and Emergency Controlling, Chongqing 400037, ChinaFollow
SHI Shuhan, China Coal Research Institute, Beijing 100013, China; China Coal Technology and Engineering Group Chongqing Research Institute, Chongqing 400039, China; State Key Laboratory of The Gas Disaster Detecting, Preventing and Emergency Controlling, Chongqing 400037, ChinaFollow
XIN Dezhong, China Coal Technology and Engineering Group Chongqing Research Institute, Chongqing 400039, China; State Key Laboratory of The Gas Disaster Detecting, Preventing and Emergency Controlling, Chongqing 400037, China
CHEN Hang, China Coal Technology and Engineering Group Chongqing Research Institute, Chongqing 400039, China; State Key Laboratory of The Gas Disaster Detecting, Preventing and Emergency Controlling, Chongqing 400037, China
ZHANG Shitao, China Coal Technology and Engineering Group Chongqing Research Institute, Chongqing 400039, China; State Key Laboratory of The Gas Disaster Detecting, Preventing and Emergency Controlling, Chongqing 400037, China

Abstract

In view of the requirements of hole sealing during gas extraction drilling in underground coal mine for manual packer installation and sealing material injection, as well as the low automation level of hole sealing technology, a three-stage automatic hole packer for gas extraction drilling in underground coal mine was developed, with the appearance similar to the drill pipe. The hole packer could be mechanized into the drilling hole by an automatic drilling machine, and realize the automatic injection of sealing material. Herein, the Mooney-Rivlin hyperelastic constitutive model was used to represent the strain energy function by the finite element analysis method. Thereby, the stress of the rubber seal ring under the dynamic sealing mechanism of the hole packer, and the expansion of the rubber sleeve of different rubber materials under different expansion forces, were obtained, thus providing a reference for the determination of the sliding force value of the dynamic sealing mechanism and the selection of the rubber sleeve material. Using the method of theoretical calculation, the hydraulic calculation was carried out for the flow channel of the three-stage automatic hole packer under working conditions. In this way, the water flow and pressure of the three-stage automatic hole packer were obtained, which provides reference for the determination of automatic hole sealing parameters. Besides, the stress of the liquid storage chamber of the hole packer was checked with the finite element analysis method, and the rationality of the structure design of the core components of the three-stage automatic hole packer was analyzed to ensure the normal operation of the hole packer. In addition, the experimental prototype was made, and the laboratory sealing experiment and the sealing effect comparison experiment were carried out with the three-stage automatic hole packer. The laboratory sealing experiment shows that the dynamic sealing mechanism of the hole packer has good sealing effect, the hole sealing material is automatically injected into the simulated drilling hole, the natural rubber sleeve is automatically expanded to fill the simulated drilling hole and can effectively seal the hole sealing material. Therefore, it is feasible to use the three-stage automatic hole packer. The hole sealing effect comparison experiment shows that the sealing effect of automatic hole packer is similar to that of existing polyurethane pressure injection process, and better than that of the traditional polyurethane winding process. The three-stage automatic hole packer can reduce the labor intensity of coal mine workers, improve the sealing efficiency and standardize the sealing process, thus providing reference for the research on the automatic hole sealing technology and equipment for underground gas extraction drilling in coal mine.

Keywords

gas extraction, automatic hole sealing, structure design, two plugging and one injection, polyurethane sealing, coal mine

DOI

10.12363/issn.1001-1986.23.05.0281

Recommended Citation

WANG Qingfeng, SHI Shuhan, XIN Dezhong, et al. (2023) "Research on three-stage automatic hole packer for gas extraction drilling in underground coal mine," Coal Geology & Exploration: Vol. 51: Iss. 9, Article 28.
DOI: 10.12363/issn.1001-1986.23.05.0281
Available at: https://cge.researchcommons.org/journal/vol51/iss9/28

Reference

[1] 刘程,孙东玲,武文宾,等. 我国煤矿瓦斯灾害超前大区域精准防控技术体系及展望[J]. 煤田地质与勘探,2022,50(8):82−92.

LIU Cheng,SUN Dongling,WU Wenbin,et al. Analysis and prospect of precise prevention and control technical system ahead of large areas and time for gas disasters in China[J]. Coal Geology & Exploration,2022,50(8):82−92.

[2] 石智军,董书宁,杨俊哲,等. 煤矿井下 3000 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 3000 m in underground coal mine[J]. Coal Geology & Exploration,2019,47(6):1−7.

[3] LI Yaobin,JIANG Tao,GUO Xin. Research on gas extraction technology of directional long borehole in ultrathick coal seam[J]. Geofluids,2022,2022:6957896.

[4] 赵旭生,马国龙. 煤矿瓦斯智能抽采关键技术研究进展及展望[J]. 煤炭科学技术,2021,49(5):27−34.

ZHAO Xusheng,MA Guolong. Research progress and prospect of key technology of intelligent gas drainage in coal mine[J]. Coal Science and Technology,2021,49(5):27−34.

[5] ZHANG Yongjiang,ZOU Quanle,GUO Lindong. Air–leakage model and sealing technique with sealing–isolation integration for gas–drainage boreholes in coal mines[J]. Process Safety and Environmental Protection,2020,140:258−272.

[6] 王兆丰,武炜. 煤矿瓦斯抽采钻孔主要封孔方式剖析[J]. 煤炭科学技术,2014,42(6):31−34.

WANG Zhaofeng,WU Wei. Analysis on major borehole sealing methods of mine gas drainage boreholes[J]. Coal Science and Technology,2014,42(6):31−34.

[7] 李辉,郭绍帅,苏勋. 分体式囊袋注浆封孔器的研制与应用[J]. 中国安全科学学报,2018,28(1):112−117.

LI Hui,GUO Shaoshuai,SU Xun. Development and application of split bag grouting device[J]. China Safety Science Journal,2018,28(1):112−117.

[8] 周福宝,李金海,昃玺,等. 煤层瓦斯抽放钻孔的二次封孔方法研究[J]. 中国矿业大学学报,2009,38(6):764−768.

ZHOU Fubao,LI Jinhai,ZE Xi,et al. A study of the second hole sealing method to improve gas drainage in coal seams[J]. Journal of China University of Mining & Technology,2009,38(6):764−768.

[9] 黄旭超,王正帅,陈建杰,等. 煤层群联合压裂增透石门快速揭煤技术研究与应用[J]. 煤炭科学技术,2018,46(6):52−56.

HUANG Xuchao,WANG Zhengshuai,CHEN Jianjie,et al. Research and application of rapid seam opening technology to crosscut in seam group with combined fracturing and permeability improvement[J]. Coal Science and Technology,2018,46(6):52−56.

[10] 仲超. 瓦斯抽采上行钻孔钻屑自封孔性能实验研究[D]. 徐州：中国矿业大学，2017.

ZHONG Chao. Experimental study on self–sealing performance of uplink boreholes by drilling cuttings for gas extraction[D]. Xuzhou：China University of Mining and Technology，2017.

[11] 黄凡. 基于氧烛的胶囊–粘液封孔技术研究[D]. 徐州：中国矿业大学，2019.

HUANG Fan. Capsule–mucus sealing technology based on oxygen candle[D]. Xuzhou：China University of Mining and Technology，2019.

[12] 禹增一. 基于氧烛的新型胶囊粘液自升压封孔器研究[D]. 徐州：中国矿业大学，2020.

YU Zengyi. Study on a new type of capsule–mucous self–boosting sealer based on oxygen candle[D]. Xuzhou：China University of Mining and Technology，2020.

[13] 孔维一,赵和平,刘泉霖,等. 瓦斯抽采钻孔喷涂式封孔技术[J]. 工矿自动化,2021,47(12):19−24.

KONG Weiyi,ZHAO Heping,LIU Quanlin,et al. Spray sealing technology for gas extraction drilling[J]. Industry and Mine Automation,2021,47(12):19−24.

[14] 王力,姚宁平,王毅,等. 煤矿井下整体式多通道自动化封孔装置研究[J]. 煤矿安全,2022,53(1):121−127.

WANG Li,YAO Ningping,WANG Yi,et al. Research on multi–channel sealing device for automatic sealing of underground gas extraction hole in coal mine[J]. Safety in Coal Mines,2022,53(1):121−127.

[15] 李程程. 煤矿井下瓦斯抽采钻孔多通道封孔装置及封孔工艺研究[D]. 北京：煤炭科学研究总院，2021.

LI Chengcheng. Research on multi–channel sealing device and sealing technology for gas drainage borehole in underground coal mines[D]. Beijing：China Coal Research Institute，2021.

[16] 李程程,王毅,王力,等. 煤矿井下自动封孔装置坐封与注浆压力研究[J]. 煤田地质与勘探,2021,49(2):253−259.

LI Chengcheng,WANG Yi,WANG Li,et al. Research on the grouting and setting pressure of the automatic hole sealing device in underground coal mine[J]. Coal Geology & Exploration,2021,49(2):253−259.

[17] 彭向峰,李录贤. 超弹性材料本构关系的最新研究进展[J]. 力学学报,2020,52(5):1221−1232.

PENG Xiangfeng,LI Luxian. State of the art of constitutive relations of hyperelastic materials[J]. Chinese Journal of Theoretical and Applied Mechanics,2020,52(5):1221−1232.

[18] MOONEY M. A theory of large elastic deformation[J]. Journal of Applied Physics,1940,11(9):582−592.

[19] RIVLIN R S. Large elastic deformations of isotropic materials IV. further developments of the general theory[J]. Phil Trans R Soc A,1948,241:379−397.

[20] YEOH O H. Some forms of the strain energy function for rubber[J]. Rubber Chemistry and Technology,1993,66(5):754−771.

[21] GENT A N. A new constitutive relation for rubber[J]. Rubber Chemistry and Technology,1996,69(1):59−61.

[22] OGDEN R W. Large deformation isotropic elasticity:On the correlation of theory and experiment for compressible rubberlike solids[J]. Proceedings of the Royal Society A,1972,328:567−583.

[23] 黄建龙,解广娟,刘正伟. 基于Mooney–Rivlin模型和Yeoh模型的超弹性橡胶材料有限元分析[J]. 橡胶工业,2008,55(8):467−471.

HUANG Jianlong,XIE Guangjuan,LIU Zhengwei. Finite element analysis of hyperelastic rubber material based on Mooney–Rivlin model and Yeoh model[J]. China Rubber Industry,2008,55(8):467−471.

[24] 王雷,李毅,马智慧. 基于Mooney–Rivlin模型的车辆环形橡胶减震器径向刚度计算与参数优化[J]. 兵工学报,2022,43(增刊1):35−45.

WANG Lei,LI Yi,MA Zhihui. The radial stiffness calculation and parameter optimization of the annular rubber shock absorber based on Mooney–Rivlin model[J]. Acta Armamentarii,2022,43(Sup.1):35−45.

[25] 来增武,李保学,邱淼. 煤矿采煤工作面瓦斯抽放封孔技术研究[J]. 煤炭技术,2020,39(3):119−120.

LAI Zengwu,LI Baoxue,QIU Miao. Study on sealing technology of gas drainage in coal mining face[J]. Coal Technology,2020,39(3):119−120.

[26] 王积伟. 液压传动[M]. 北京：机械工业出版社，2018.