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Coal Geology & Exploration

Abstract

Background In the coal mining areas of China, coalbed methane (coal mine gas) occurs under complex conditions, rendering it difficult to achieve its efficient resource exploitation and effective hazard control using a single technique.Advances As indicated by the current state of the research, development, and engineering application of coalbed methane (coal mine gas) drainage techniques in China in recent years, the drainage methods can be classified into three categories according to their spatial arrangements: surface drainage, underground drainage, and surface-underground combined drainage. Furthermore, the surface and underground drainage methods can be subdivided into four types based on their temporal arrangements: surface pre-drainage, underground pre-drainage, surface drainage through mining-induced pressure relief, and underground drainage through mining-induced pressure relief. Among these, the pre-drainage methods are primarily applicable to coalbed methane (coal mine gas) pre-drainage before coal seam mining, whereas the drainage methods through mining-induced pressure relief are primarily used for gas control during coal seam mining. This study presents a comparative analysis of primary techniques and their characteristics for various drainage methods. The analysis results reveal that primary techniques for surface pre-drainage include vertical wells (cluster wells), remotely connected horizontal wells, multi-branch horizontal wells, and multistage fracturing using horizontal wells; techniques for surface drainage through mining-induced pressure relief are dominated by vertical and L-shaped wells; principal underground pre-drainage techniques comprise in-seam drilling, crossing-seam drilling, and pneumatic directional drilling; and techniques for underground drainage through mining-induced pressure relief are composed primarily of crossing-seam drilling and high-level directional drilling. Additionally, the surface-underground combined drainage techniques refer primarily to those that enable efficient gas drainage by connecting the underground directional long boreholes to the fracturing range of surface wells. These techniques are primarily used to rapidly achieve effective gas drainage in the preparation areas of coal mines. Based on their applicable geological and coal-engineering conditions, the application effects of various drainage techniques in their demonstration projects in representative coal mines are analyzed. The results indicate that multistage fracturing using horizontal wells and L-shaped wells represent efficient techniques for surface pre-drainage and surface drainage through mining-induced pressure relief, respectively. In contrast, the engineering quality and effectiveness of underground pre-drainage and underground drainage through mining-induced pressure relief are primarily controlled by the directional drilling process and its technical level.Prospects Based on the trends in the coal and coalbed methane (coal mine gas) industries of China, this study proposes four key development directions of techniques for coalbed methane (coal mine gas) drainage in coal mining areas: surface-underground combined gas drainage, the coordinated exploration and exploitation of deep coalbed methane and coal resources, the synergistic control of multiple hazards, and the recovery and utilization of coalbed methane resources in closed mines.

Keywords

coal mining area, coalbed methane (coal mine gas), pre-drainage, drainage through pressure relief, surface-underground combined drainage, coordinated exploitation of coal and coalbed methane, application effect

DOI

10.12363/issn.1001-1986.25.09.0736

Reference

[1] 王国法,李世军,张金虎,等. 筑牢煤炭产业安全 奠定能源安全基石[J]. 中国煤炭,2022,48(7):1−9

WANG Guofa,LI Shijun,ZHANG Jinhu,et al. Ensuring the safety of coal industry to lay the cornerstone of energy security[J]. China Coal,2022,48(7):1−9

[2] 矿区煤层气开发项目组. 煤层气与煤炭协调开发理论与技术[M]. 北京：科学出版社，2021.

[3] 刘见中. 我国煤矿安全的科技需求与对策[J]. 煤矿安全,2009,40(8):112−115

[4] 钱鸣高,许家林,缪协兴. 煤矿绿色开采技术[J]. 中国矿业大学学报,2003,32(4):343−348

QIAN Minggao,XU Jialin,MIAO Xiexing. Green technique in coal mining[J]. Journal of China University of Mining & Technology,2003,32(4):343−348

[5] 程远平,俞启香,袁亮,等. 煤与远程卸压瓦斯安全高效共采试验研究[J]. 中国矿业大学学报,2004,33(2):132−136

CHENG Yuanping,YU Qixiang,YUAN Liang,et al. Experimental research of safe and high–efficient exploitation of coal and pressure relief gas in long distance[J]. Journal of China University of Mining & Technology,2004,33(2):132−136

[6] 袁亮. 卸压开采抽采瓦斯理论及煤与瓦斯共采技术体系[J]. 煤炭学报,2009,34(1):1−8

YUAN Liang. Theory of pressure–relieved gas extraction and technique system of integrated coal production and gas extraction[J]. Journal of China Coal Society,2009,34(1):1−8

[7] 王振,申凯,林桂玲. 井下顺层多分支定向长钻孔瓦斯抽采特性研究[J]. 矿业安全与环保,2025,52(3):65−73

WANG Zhen,SHEN Kai,LIN Guiling. Study on gas extraction characteristics of multi–branch directional long drillings along underground coal seam[J]. Mining Safety & Environmental Protection,2025,52(3):65−73

[8] 刘泽功. 煤矿抽放瓦斯技术现状及展望[J]. 中国煤炭,2000,26(8):12−14

LIU Zegong. The current status and prospects of coal mine gas extraction technology[J]. China Coal,2000,26(8):12−14

[9] 瓦斯通风防灭火安全研究所. 煤矿瓦斯抽放技术发展的50年[J]. 煤矿安全,2003,34(增刊1):5−9

[10] 周世宁. 水力压裂煤层抽放瓦斯的理论分析[J]. 煤矿安全,1980,11(5):11−15

[11] 屠锡根,吴继周,胡光龙. 地面钻孔抽放瓦斯[J]. 煤矿安全,1979,10(6):1−4

[12] 张群,降文萍,姜在炳,等. 我国煤矿区煤层气地面开发现状及技术研究进展[J]. 煤田地质与勘探,2023,51(1):139−158

ZHANG Qun,JIANG Wenping,JIANG Zaibing,et al. Present situation and technical research progress of coalbed methane surface development in coal mining areas of China[J]. Coal Geology & Exploration,2023,51(1):139−158

[13] 何勇. 本煤层瓦斯抽放技术[J]. 煤矿安全,1997,28(6):19−21

[14] 张铁岗. 高瓦斯综采工作面的瓦斯综合治理[J]. 中国煤炭,1999,25(3):17−19

ZHANG Tiegang. Comprehensive gas prevention and control in fully mechanized coal face with high gas in–flow rate[J]. China Coal,1999,25(3):17−19

[15] 彭煜敏,丁华忠,丁同福,等. 淮南矿区松软低渗煤层地面瓦斯治理技术研究与应用[J]. 油气藏评价与开发,2025,15(6):1061−1069

PENG Yumin,DING Huazhong,DING Tongfu,et al. Research and application of surface gas control technology for soft and low–permeability coal seams in Huainan mining area[J]. Petroleum Reservoir Evaluation and Development,2025,15(6):1061−1069

[16] 张群,孙四清,降文萍. 碎软低渗煤层煤矿区煤层气勘探开发关键技术及发展方向[J]. 石油学报,2024,45(5):855−865

ZHANG Qun,SUN Siqing,JIANG Wenping. Key technologies and development direction of CBM exploration and development in coal mine area of fractured soft and low permeability coal seams[J]. Acta Petrolei Sinica,2024,45(5):855−865

[17] 降文萍,张群,吴静. 煤矿区煤层气分段压裂水平井辅助消突效果评价方法及应用[J]. 煤炭工程,2025,57(4):138−144

JIANG Wenping,ZHANG Qun,WU Jing. Evaluation method and application of auxiliary outburst elimination effect of horizontal well with staged fracturing of CBM in coal mining area[J]. Coal Engineering,2025,57(4):138−144

[18] 周显俊,李国富,李超,等. 煤矿采空区煤层气地面开发技术及工程应用:以沁水盆地晋城矿区为例[J]. 煤田地质与勘探,2022,50(5):66−72

ZHOU Xianjun,LI Guofu,LI Chao,et al. Ground development technology and engineering application of CBM in coal mine goafs:A case study of Jincheng mining area in Qinshui Basin[J]. Coal Geology & Exploration,2022,50(5):66−72

[19] 雷毅,申宝宏,刘见中. 煤矿区煤层气与煤炭协调开发模式初探[J]. 煤矿开采,2012,17(3):1−4

LEI Yi,SHEN Baohong,LIU Jianzhong. Initial discussion of coalbed methane and coal coordination mining mode[J]. Coal Mining Technology,2012,17(3):1−4

[20] 张千贵,李权山,范翔宇,等. 中国煤与煤层气共采理论技术现状及发展趋势[J]. 天然气工业,2022,42(6):130−145

ZHANG Qiangui,LI Quanshan,FAN Xiangyu,et al. Current situation and development trend of theories and technologies for coal and CBM co–mining in China[J]. Natural Gas Industry,2022,42(6):130−145

[21] 孙四清,杨帆,郑玉岐,等. 煤矿区煤层气开发技术应用现状及展望[J]. 油气藏评价与开发,2025,15(6):972−982

SUN Siqing,YANG Fan,ZHENG Yuqi,et al. Current applications and prospects of coalbed methane development technologies in coal mining areas[J]. Petroleum Reservoir Evaluation and Development,2025,15(6):972−982

[22] 李国富,李超,张碧川,等. 我国煤矿瓦斯抽采与利用发展历程、技术进展及展望[J]. 煤田地质与勘探,2025,53(1):77−91

LI Guofu,LI Chao,ZHANG Bichuan,et al. Gas drainage and utilization in coal mines in China:History,technological advances,and prospects[J]. Coal Geology & Exploration,2025,53(1):77−91

[23] SHANG Zheng,WANG Haifeng,CHENG Yuanping,et al. Optimal selection of coal seam pressure–relief gas extraction technologies:A typical case of the Panyi coal mine,Huainan coalfield,China[J]. Energy Sources,Part A:Recovery,Utilization,and Environmental Effects,2022,44(1):1105−1125.

[24] LU Y Y,ZHANG H D,ZHOU Z,et al. Current status and effective suggestions for efficient exploitation of coalbed methane in China:A review[J]. Energy & Fuels,2021,35(11):9102−9123.

[25] 晋香兰. 煤矿区煤与煤层气协调开发模式的探讨:以晋城矿区为例[J]. 中国煤炭地质,2012,24(9):16−19

JIN Xianglan. A discussion on coal and CBM coordinated exploitation mode in coalmine areas:A case study in Jincheng mining area[J]. Coal Geology of China,2012,24(9):16−19

[26] 张培河,张明山. 煤层气不同开发方式的应用现状及适应条件分析[J]. 煤田地质与勘探,2010,38(2):9−13

ZHANG Peihe,ZHANG Mingshan. Analysis of application status and adapting conditions for different methods of CBM development[J]. Coal Geology & Exploration,2010,38(2):9−13

[27] 罗平亚,刘理明,黄建,等. 中国煤层气完井技术现状及研究展望[J]. 钻采工艺,2025,48(3):1−14

LUO Pingya,LIU Liming,HUANG Jian,et al. Current status and research prospects of coalbed methane well completion technologies in China[J]. Drilling & Production Technology,2025,48(3):1−14

[28] 李金平. 彬长矿区煤层气气藏工程特征与排采控制研究[D]. 北京：中国地质大学(北京)，2015.

LI Jinping. The engineering characteristics of coalbed methane and its production control in Binchang area[D]. Beijing：China University of Geosciences (Beijing)，2015.

[29] 鲜保安,高德利,王一兵,等. 多分支水平井在煤层气开发中的应用机理分析[J]. 煤田地质与勘探,2005,33(6):34−37

XIAN Baoan,GAO Deli,WANG Yibing,et al. Analysis on applied mechanism of multiple laterals horizontal well in developing coalbed methane[J]. Coal Geology & Exploration,2005,33(6):34−37

[30] 梅文博,李贵川,曹超,等. 沁水盆地南部煤层气钻完井关键技术集成应用[J]. 钻采工艺,2025,48(3):84−91

MEI Wenbo,LI Guichuan,CAO Chao,et al. Research progress of CBM drilling and completion technologies in the southern Qinshui Basin[J]. Drilling & Production Technology,2025,48(3):84−91

[31] 袁亮,郭华,李平,等. 大直径地面钻井采空区采动区瓦斯抽采理论与技术[J]. 煤炭学报,2013,38(1):1−8

YUAN Liang,GUO Hua,LI Ping,et al. Theory and technology of goaf gas drainage with large–diameter surface boreholes[J]. Journal of China Coal Society,2013,38(1):1−8

[32] 李国富,付军辉,李超,等. 山西重点煤矿采动区煤层气地面抽采技术及应用[J]. 煤炭科学技术,2019,47(12):83−89

LI Guofu,FU Junhui,LI Chao,et al. Surface drainage technology and application of CBM in key mining areas of Shanxi Province[J]. Coal Science and Technology,2019,47(12):83−89

[33] 张源芝,王毅,张晶. 地面采动L型水平井高效钻完井关键技术研究[J]. 煤矿安全,2025,56(6):17−26

ZHANG Yuanzhi,WANG Yi,ZHANG Jing. Research on key technology for efficient drilling and completion well of L–shaped horizontal well of surface mining[J]. Safety in Coal Mines,2025,56(6):17−26

[34] 许超,姜磊,陈盼,等. 煤矿井下大盘区瓦斯抽采定向钻进技术与装备[J]. 煤田地质与勘探,2022,50(4):147−152

XU Chao,JIANG Lei,CHEN Pan,et al. Directional drilling technology and equipment for gas drainage in large panel of underground coal mines[J]. Coal Geology & Exploration,2022,50(4):147−152

[35] 白稳乐,姚宁平,宋海涛,等. 底抽巷全断面履带钻机关键技术[J]. 煤矿安全,2017,48(1):113−115

BAI Wenle,YAO Ningping,SONG Haitao,et al. Key technology for track–mounted drill of full section bed plate tunnel[J]. Safety in Coal Mines,2017,48(1):113−115

[36] 孙永新,张杰,马强,等. 王坡煤矿碎软煤层高压氮气定向钻进试验研究[J]. 煤矿安全,2022,53(7):64−69

SUN Yongxin,ZHANG Jie,MA Qiang,et al. Experimental study on directional drilling with high pressure nitrogen in soft–fragmentized coal seam of Wangpo coal mine[J]. Safety in Coal Mines,2022,53(7):64−69

[37] 陈兴隆. 工作面动压区穿层钻孔瓦斯抽采技术及其效果分析[J]. 中国矿业,2024,33(7):202−207

CHEN Xinglong. Gas extraction technology and its effect analysis of perforating borehole in dynamic pressure zone of working face[J]. China Mining Magazine,2024,33(7):202−207

[38] 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

[39] 苏士龙,闫大鹤,陈亮,等. 突出煤层群“三区”联动全过程定量评价方法研究[J]. 煤炭工程,2021,53(6):124−129

SU Shilong,YAN Dahe,CHEN Liang,et al. Quantitative evaluation for the whole process of three–zone linkage in outburst coal seam group[J]. Coal Engineering,2021,53(6):124−129

[40] 刘彦青,赵灿,李国富,等. 晋城矿区煤与煤层气协调开发模式优化决策方法[J]. 煤炭学报,2020,45(7):2575−2589

LIU Yanqing,ZHAO Can,LI Guofu,et al. Optimized decision method of coordinated development mode of coal and coalbed methane in Jincheng mining area[J]. Journal of China Coal Society,2020,45(7):2575−2589

[41] 张光波,祁空军,刘春春,等. 煤矿区煤层气与煤协调开发模式探讨[J]. 中国煤层气,2018,15(6):43−46

ZHANG Guangbo,QI Kongjun,LIU Chunchun,et al. Discussion on coordinated development mode of CBM and coal in coal mining area[J]. China Coalbed Methane,2018,15(6):43−46

[42] 陈文静. “双碳”目标下煤层气与煤炭资源协调开发的机制及效益研究[D]. 太原：太原理工大学，2023.

CHEN Wenjing. Research on the mechanism and benefits of coordinated development of coalbed methane and coal resources under the goal of “dual carbon”[D]. Taiyuan：Taiyuan University of Technology，2023.

[43] 降文萍,柴建禄,张群,等. 基于煤层气与煤炭协调开发的地面抽采工程部署关键技术进展[J]. 煤炭科学技术,2022,50(12):50−61

JIANG Wenping,CHAI Jianlu,ZHANG Qun,et al. Key technology progress of surface extraction project deployment based on coordinated development of CBM and coal[J]. Coal Science and Technology,2022,50(12):50−61

[44] 刘洪林. 煤层气–煤气化一体化开采模式及发展前景[C]//煤层气勘探开发技术新进展——2018年全国煤层气学术研讨会论文集. 中国石油勘探开发研究院非常规研究所，中国石油非常规油气重点实验室，2018：630–637.

[45] 孟召平,李国富,杨宇,等. 晋城寺河井区煤矿采空区煤层气地面抽采关键技术研究[J]. 煤炭科学技术,2021,49(1):240−247

MENG Zhaoping,LI Guofu,YANG Yu,et al. Study on key technology for surface extraction of coalbed methane in coal mine goaf from Sihe wells area,Jincheng[J]. Coal Science and Technology,2021,49(1):240−247

[46] 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

[47] 李国富,季长江,李军军,等. 寺河东五盘区煤与煤层气共采技术与应用[J]. 煤炭科学技术,2025,53(3):291−303

LI Guofu,JI Changjiang,LI Junjun,et al. Technology and application of coal and CBM co–mining in east fifth panel of Sihe mine[J]. Coal Science and Technology,2025,53(3):291−303

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