Volume 50 Issue 8
Aug.  2022
Turn off MathJax
Article Contents
Abstract
References
Related Articles
CHEN Dongdong，WANG Jianli，JIA Bingyi，et al. High-efficiency regional gas drainage model after hydraulic fracturing of comb-shaped long boreholes in the roof of broken soft and low permeability coal seam[J]. Coal Geology & Exploration，2022，50(8)：29−36. DOI: 10.12363/issn.1001-1986.22.03.0195
Citation: CHEN Dongdong，WANG Jianli，JIA Bingyi，et al. High-efficiency regional gas drainage model after hydraulic fracturing of comb-shaped long boreholes in the roof of broken soft and low permeability coal seam[J]. Coal Geology & Exploration，2022，50(8)：29−36. DOI: 10.12363/issn.1001-1986.22.03.0195
shu

High-efficiency regional gas drainage model after hydraulic fracturing of comb-shaped long boreholes in the roof of broken soft and low permeability coal seam

  • 1.

    Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China

  • 2.

    Hancheng Mining Co. Ltd., Hancheng 715400, China

More Information
  • Received Date: March 24, 2022
  • Revised Date: June 29, 2022
  • Accepted Date: June 29, 2022
  • Available Online: August 02, 2022
    Graphical Abstract
    • Abstract

  • Advanced management of gas enrichment area is an important guarantee to realize safe, efficient and intelligent mining in coal mine. Aiming at the problem of high-efficiency gas drainage in broken and soft coal seam region, taking No.3 coal seam in Hancheng mining area as the research object, a gas drainage mode of comb-shaped long borehole hydraulic fracturing in the roof of coal seam is proposed. The applicability of the model is verified by means of theoretical analysis, numerical simulation and field test, and the fracture propagation law, gas drainage mechanism, and fracturing curve features of comb-shaped borehole in adjacent roof are clarified. Then, a key technology system of open-hole staged hydraulic fracturing for long comb boreholes in the roof is established, which is suitable for 500 m borehole depth. The system integrates dynamic analysis of geological conditions, staged fracturing, packer blockage release and continuous exploration of fracturing range, realizing the main hole track of comb borehole in coal seam roof about 5 m away from the coal seam, multi-stage uniform fracturing, whole hole monitoring and efficient accident handling. On this basis, the engineering practice of two holes has been carried out in Sangshuping No.2 well. The length of the main fracturing hole is 588 m, about 2.0 m away from No.3 coal seam, and there are 6 fractured sections of single hole. The exploration depth of the fracturing range is 381 m, and the overall fracturing influence radius is more than 20 m. After fracturing, the average gas drainage concentration of borehole is more than 40%, and the gas drainage volume is more than 1 m3/min. The drainage effect is 4 times that of the conventional boreholes, and the effective radius of gas drainage reaches up to 9 m in 120 days, realizing efficient gas drainage in broken soft coal seam area. Furthermore, this study puts forward the technical ideas of large-scale application, which is suitable for large-scale gas drainage in broken soft coal seam and remote regional drainage and pressure relief in broken soft and strong outburst coal seam with high gas pressure.

    • FullText(HTML)
    • References (23)
  • [1]
    袁亮. 我国煤矿安全发展战略研究[J]. 中国煤炭, 2021, 47(6): 1–6. DOI: 10.19880/j.cnki.ccm.2021.06.001

    YUAN Liang. Study on the development strategy of coal mine safety in China[J]. China Coal, 2021, 47(6): 1–6. DOI: 10.19880/j.cnki.ccm.2021.06.001
    [2]
    董书宁, 刘再斌, 程建远, 等. 煤炭智能开采地质保障技术及展望[J]. 煤田地质与勘探, 2021, 49(1): 21–31. DOI: 10.3969/j.issn.1001-1986.2021.01.003

    DONG Shuning, LIU Zaibin, CHENG Jianyuan, et al. Technologies and prospect of geological guarantee for intelligent coal mining[J]. Coal Geology & Exploration, 2021, 49(1): 21–31. DOI: 10.3969/j.issn.1001-1986.2021.01.003
    [3]
    刘业娇, 袁亮, 薛俊华, 等. 2007–2016年全国煤矿瓦斯灾害事故发生规律分析[J]. 矿业安全与环保, 2018, 45(3): 124–128. DOI: 10.3969/j.issn.1008-4495.2018.03.028

    LIU Yejiao, YUAN Liang, XUE Junhua, et al. Analysis on the occurrence law of gas disaster accidents in coal mine from 2007 to 2016[J]. Mining Safety & Environmental Protection, 2018, 45(3): 124–128. DOI: 10.3969/j.issn.1008-4495.2018.03.028
    [4]
    李福兴, 李璐爔. 面向煤炭开采的大数据处理平台构建关键技术[J]. 煤炭学报, 2019, 44(增刊1): 362–369. DOI: 10.13225/j.cnki.jccs.2019.0252

    LI Fuxing, LI Luxi. Key technologies of big data processing platform construction for coal mining[J]. Journal of China Coal Society, 2019, 44(Sup. 1): 362–369. DOI: 10.13225/j.cnki.jccs.2019.0252
    [5]
    丁百川. 我国煤矿主要灾害事故特点及防治对策[J]. 煤炭科学技术, 2017, 45(5): 109–114. DOI: 10.13199/j.cnki.cst.2017.05.019

    DING Baichuan. Features and prevention countermeasures of major disasters occurred in China coal mine[J]. Coal Science and Technology, 2017, 45(5): 109–114. DOI: 10.13199/j.cnki.cst.2017.05.019
    [6]
    姜在炳, 李浩哲, 方良才, 等. 紧邻碎软煤层顶板水平井分段穿层压裂裂缝延展机理[J]. 煤炭学报, 2020, 45(增刊2): 922–931. DOI: 10.13225/j.cnki.jccs.2020.0745

    JIANG Zaibing, LI Haozhe, FANG Liangcai, et al. Fracture propagation mechanism of staged through–layer fracturing for horizontal well in roof adjacent to broken–soft coal seams[J]. Journal of China Coal Society, 2020, 45(Sup. 2): 922–931. DOI: 10.13225/j.cnki.jccs.2020.0745
    [7]
    曹代勇, 宁树正, 郭爱军, 等. 中国煤田构造格局及其基本特征[J]. 矿业科学学报, 2016, 1(1): 1–8. DOI: 10.19606/j.cnki.jmst.2016.01.002

    CAO Daiyong, NING Shuzheng, GUO Aijun, et al. Basic characteristics of coalfield tectonic framework in China[J]. Journal of Mining Science and Technology, 2016, 1(1): 1–8. DOI: 10.19606/j.cnki.jmst.2016.01.002
    [8]
    曹代勇, 占文锋, 李焕同, 等. 中国煤矿动力地质灾害的构造背景与风险区带划分[J]. 煤炭学报, 2020, 45(7): 2376–2388.

    CAO Daiyong, ZHAN Wenfeng, LI Huantong, et al. Tectonic setting and risk zoning of dynamic geological disasters in coal mines in China[J]. Journal of China Coal Society, 2020, 45(7): 2376–2388.
    [9]
    张慧杰, 张浪, 汪东, 等. 构造煤的瓦斯放散特征及孔隙结构微观解释[J]. 煤炭学报, 2018, 43(12): 3404–3410.

    ZHANG Huijie, ZHANG Lang, WANG Dong, et al. Gas emission characteristics of tectonic coal and microscopic explanation of pore structure[J]. Journal of China Coal Society, 2018, 43(12): 3404–3410.
    [10]
    郑凯歌. 碎软低透煤层底板梳状长钻孔分段水力压裂增透技术研究[J]. 采矿与安全工程学报, 2020, 37(2): 272–281.

    ZHENG Kaige. Permeability improving technology by sectional hydraulic fracturing for comb–like long drilling in floor of crushed and soft coal seam with low permeability[J]. Journal of Mining & Safety Engineering, 2020, 37(2): 272–281.
    [11]
    陈冬冬, 孙四清, 张俭, 等. 井下定向长钻孔水力压裂煤层增透技术体系与工程实践[J]. 煤炭科学技术, 2020, 48(10): 84–89. DOI: 10.13199/j.cnki.cst.2020.10.009

    CHEN Dongdong, SUN Siqing, ZHANG Jian, et al. Technical system and engineering practice of coal seam permeability improvement through underground directional long borehole hydraulic fracturing[J]. Coal Science and Technology, 2020, 48(10): 84–89. DOI: 10.13199/j.cnki.cst.2020.10.009
    [12]
    张群, 葛春贵, 李伟, 等. 碎软低渗煤层顶板水平井分段压裂煤层气高效抽采模式[J]. 煤炭学报, 2018, 43(1): 150–159. DOI: 10.13225/j.cnki.jccs.2017.1422

    ZHANG Qun, GE Chungui, LI Wei, et al. A new model and application of coalbed methane high efficiency production from broken soft and low permeable coal seam by roof strata–in horizontal well and staged hydraulic fracture[J]. Journal of China Coal Society, 2018, 43(1): 150–159. DOI: 10.13225/j.cnki.jccs.2017.1422
    [13]
    李彬刚. 芦岭煤矿碎软低渗煤层高效抽采技术[J]. 煤田地质与勘探, 2017, 45(4): 81–84. DOI: 10.3969/j.issn.1001-1986.2017.04.014

    LI Bingang. Technology of CBM extraction in the crushed and soft coal seam in Luling coal mine[J]. Coal Geology & Exploration, 2017, 45(4): 81–84. DOI: 10.3969/j.issn.1001-1986.2017.04.014
    [14]
    孙四清, 张群, 闫志铭, 等. 碎软低渗高突煤层井下长钻孔整体水力压裂增透工程实践[J]. 煤炭学报, 2017, 42(9): 2337–2344. DOI: 10.13225/j.cnki.jccs.2017.0689

    SUN Siqing, ZHANG Qun, YAN Zhiming, et al. Practice of permeability enhancement through overall hydraulic fracturing of long hole in outburst–prone soft crushed coal seam with low permeability[J]. Journal of China Coal Society, 2017, 42(9): 2337–2344. DOI: 10.13225/j.cnki.jccs.2017.0689
    [15]
    方俊, 刘飞, 李泉新, 等. 煤矿井下碎软煤层空气复合定向钻进技术与装备[J]. 煤炭科学技术, 2019, 47(2): 224–229. DOI: 10.13199/j.cnki.cst.2019.02.036

    FANG Jun, LIU Fei, LI Quanxin, et al. Air compound directional drilling technology and equipment for soft–fragmentized seam underground coal mine[J]. Coal Science and Technology, 2019, 47(2): 224–229. DOI: 10.13199/j.cnki.cst.2019.02.036
    [16]
    刘建林, 方俊, 褚志伟, 等. 碎软煤层空气泡沫复合定向钻进技术应用研究[J]. 煤田地质与勘探, 2021, 49(5): 278–285.

    LIU Jianlin, FANG Jun, CHU Zhiwei, et al. Application of air foam composite directional drilling technology in broken soft coal seams[J]. Coal Geology & Exploration, 2021, 49(5): 278–285.
    [17]
    史晓勇. 韩城矿区松软突出煤层瓦斯抽采技术研究[J]. 煤炭工程, 2012(增刊1): 109–110.

    SHI Xiaoyong. Study on gas extraction technology of soft outburst coal seam in Hancheng mining area[J]. Coal Engineering, 2012(Sup. 1): 109–110.
    [18]
    李全贵, 邓羿泽, 胡千庭, 等. 煤层水力压裂应力与裂隙演化的细观规律[J]. 煤田地质与勘探, 2022, 50(6): 32−40. doi: 10.12363/issn.1001-1986.21.10.0603.

    LI Quangui, DENG Yize, HU Qianting, et al. Mesoscopic law of stress and fracture evolution of coal seams hydraulic fracturing[J]. Coal Geology & Exploration, 2022, 50(6): 32−40. doi: 10.12363/issn.1001-1986.21.10.0603.
    [19]
    岑夺丰, 刘超, 黄达. 拉剪应力作用下单裂隙砂岩裂纹扩展规律试验研究[J]. 煤炭学报, 2021: 1–9 [2022-07-02]. https://kns.cnki.net/kcms/detail/11.2190.td.20210806.1113.002. html.

    CEN Duofeng, LIU Chao, HUANG Da. Experimental investigation on crack propagation law of sandstone containing a single fissure under tensile–shear stress[J]. Journal of China Coal Society, 2021: 1–9 [2022-07-02]. https://kns.cnki.net/kcms/detail/11.2190.td.20210806.1113.002.html.
    [20]
    刘帅奇, 马凤山, 郭捷, 等. 水力劈裂裂隙扩展与软弱面作用机理离散元研究[J]. 东北大学学报(自然科学版), 2021, 42(3): 444–456. DOI: 10.12068/j.issn.1005-3026.2021.03.021

    LIU Shuaiqi, MA Fengshan, GUO Jie, et al. Discrete element investigation on the interaction of hydraulic fracturing and weak plane in deep tunnels[J]. Journal of Northeastern University(Natural Science), 2021, 42(3): 444–456. DOI: 10.12068/j.issn.1005-3026.2021.03.021
    [21]
    牟全斌, 闫志铭, 张俭. 煤矿井下定向长钻孔水力压裂瓦斯高效抽采技术[J]. 煤炭科学技术, 2020, 48(7): 296–303. DOI: 10.13199/j.cnki.cst.2020.07.032

    MOU Quanbin, YAN Zhiming, ZHANG Jian. High efficiency gas drainage technology of hydraulic fracturing with directional long drilling in underground coal mine[J]. Coal Science and Technology, 2020, 48(7): 296–303. DOI: 10.13199/j.cnki.cst.2020.07.032
    [22]
    范涛. 基于钻孔瞬变电磁的煤层气压裂效果检测方法[J]. 煤炭学报, 2020, 45(9): 3195–3207. DOI: 10.13225/j.cnki.jccs.2019.0827

    FAN Tao. Coalbed methane fracturing effectiveness test using bore–hole transient electromagnetic method[J]. Journal of China Coal Society, 2020, 45(9): 3195–3207. DOI: 10.13225/j.cnki.jccs.2019.0827
    [23]
    张子敏, 吴吟. 中国煤矿瓦斯赋存构造逐级控制规律与分区划分[J]. 地学前缘, 2013, 20(2): 237–245.

    ZHANG Zimin, WU Yin. Tectonic–level–control rule and area–dividing of coalmine gas occurrence in China[J]. Earth Science Frontiers, 2013, 20(2): 237–245.
    • Related Articles

  • Related Articles

    [1]LIU Zuiliang, ZHANG Fenxuan, ZHANG Jifeng, ZHOU Guangyu, ZHAO Hui, ZHANG Xin. Depth correction technique of electrical marker based on electrical field component of CSAMT[J]. COAL GEOLOGY & EXPLORATION, 2021, 49(4): 24-32. DOI: 10.3969/j.issn.1001-1986.2021.04.004
    [2]ZHU Qingzhong, MENG Zhaoping, HUANG Ping, HE Xulong, YANG Yanhui, ZHANGYongping. Isothermal adsorption characteristics of coal reservoir and its gas content prediction in Qinnan-Xiadian block of Qinshui basin[J]. COAL GEOLOGY & EXPLORATION, 2016, 44(4): 69-72. DOI: 10.3969/j.issn.1001-1986.2016.04.013
    [3]LI Haiming, LIU Yinghua, LI Hong. Algorithm of residual correction of CMP gather[J]. COAL GEOLOGY & EXPLORATION, 2016, 44(2): 112-115,120. DOI: 10.3969/j.issn.1001-1986.2016.02.020
    [4]ZHANG Yanyu, LI Kai, SUN Xiaofei, LI Yanjie, SUN Renyuan, SHI Xiaoying. Prediction for adsorption of multi-component gas of coals and comparative study of different adsorption models[J]. COAL GEOLOGY & EXPLORATION, 2015, 43(5): 34-38. DOI: 10.3969/j.issn.1001-1986.2015.05.009
    [5]SU Maoxin, TIAN Gang, LI Shucai, XUE Yiguo. Ground radar frequency compensation and correction technique[J]. COAL GEOLOGY & EXPLORATION, 2010, 38(1): 71-75. DOI: 10.3969/j.issn.1001-1986.2010.01.017
    [6]WANG Hui, LIU Tian-fang. Static correction in mountainous area using space-time correction method[J]. COAL GEOLOGY & EXPLORATION, 2006, 34(6): 69-73.
    [7]WANG Liang-kui, CHEN Jian-ping, LU Bo. Estimation and application of volume density of discontinuities in sampling window[J]. COAL GEOLOGY & EXPLORATION, 2002, 30(3): 42-44.
    [8]ZHONG Ling-wen, ZHANG Hui, YUAN Zheng-rong, LEI Chong-li. Influence of specific pore area and pore volume of coal on adsorption capacity[J]. COAL GEOLOGY & EXPLORATION, 2002, 30(3): 26-29.
    [9]Cui Yongjun. DISCUSSION ON THE VOLUME CORRECTION METHOD IN THE ISOTHERMAL ADSORPTION MEASUREMENT OF COAL[J]. COAL GEOLOGY & EXPLORATION, 1999, 27(5): 29-32.
    [10]YANG Yuan-hai. THE CORRECTING METHODS TO INCREASE THE IMAGE RECONSTRUCTION EFFECTIVENESS[J]. COAL GEOLOGY & EXPLORATION, 1998, 26(5): 63-66.

  • Cited by

    Periodical cited type(3)

    1. 麻坦. 螺杆钻具三卡瓦偏心打捞筒的研制及应用. 钻探工程. 2024(06): 99-105 .
    2. 赵研，艾红欣，高科，张丛珊，吕晓姝，谢晓波. 双钻头自平衡钻进系统用多通道连续缆管设计. 煤田地质与勘探. 2023(04): 164-169 . 本站查看
    3. 董昌乐. 断裂自锁防掉钻杆的设计及应用. 煤田地质与勘探. 2023(06): 200-206 . 本站查看

    Other cited types(1)

Catalog

    Get Citation
    PDF
    XML

    Article Metrics

    Article views (377) PDF downloads (58) Cited by(4)
    Related

    Copyright of website design © Editorial Office of Coal Geology & Exploration 陕ICP备05001372号-6 陕公网安备 61019002002193号

    Address: Editorial Office of Coal Geology & Exploration, No.82 Jinye 1st Rd, High-Tech Zone, Xi'an City, Shaanxi, China

    Tel: 029-81778075 E-mail: ccrimtdzykt@vip.163.com

    Supported by: Beijing Renhe Information Technology Co., Ltd.  Baidu Analytics

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return