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Volume 51 Issue 1
Jan.  2023
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Abstract
References

KANG Hongpu，FENG Yanjun，ZHANG Zhen，et al. Hydraulic fracturing technology with directional boreholes for strata control in underground coal mines and its application[J]. Coal Science and Technology，2023，51（1）：31−44

. DOI: 10.13199/j.cnki.cst.2022-2004
Citation:

KANG Hongpu，FENG Yanjun，ZHANG Zhen，et al. Hydraulic fracturing technology with directional boreholes for strata control in underground coal mines and its application[J]. Coal Science and Technology，2023，51（1）：31−44

. DOI: 10.13199/j.cnki.cst.2022-2004
shu

Hydraulic fracturing technology with directional boreholes for strata control in underground coal mines and its application

  • 1.

    CCTEG Coal Mining Research Institute, Beijing 100013, China

  • 2.

    State Key Laboratory of Coal Mining and Clean Utilization (China Coal Research Institute), Beijing 100013, China

  • 3.

    Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

Funds: 

National Key Research and Development Program of China (2017YFC0603003); Key Innovation Project of Tiandi Science & Technology Co.,Ltd. Mining Design Division (TDKC-2022-ZD-02)

More Information
  • Received Date: November 21, 2022
  • Available Online: March 08, 2023
    Graphical Abstract
    • Abstract

  • The application of hydraulic fracturing technology on rock fracturing for hard and complete roof, and destressing for roadways with high stresses is increasingly widespread. Based on a top coal caving working face with extra-thick coal seam and complete roof layers in the Caojiatan coal mine in Shaanxi Province, the roof rock geomechanical measurements, compressibility tests, theory of hydraulic fracture propagation, and 3D numerical simulation were carried out, and the determination approaches for fracturing rock horizon above a working face, fracturing borehole layout and parameters, and fracturing technology were put forward. The underground industrial trial and a comprehensive surface microseismic monitoring with actual time were conducted, and the spatial distribution characteristics of hydraulic fractures in roof were obtained. Meanwhile, shield resistance, periodic weighting step distance and duration distance, weighting dynamic load coefficient, and roof breaking energy were monitored and analyzed, and the hydraulic fracturing effect was synthetically evaluated. A complete set of technology for hydraulic fracturing with directional boreholes in underground coal mines were preliminarily established, which includes determination of fracturing rock horizon and parameter design, fracturing technology and equipment with directional boreholes, monitoring of hydraulic fracture spatial distribution, and comprehensive evaluation of hydraulic fracturing effect. The underground trial pointed out that: on the in-situ stress regime in the Caojiatan coal mine, that is the minimum principal stress is vertical stress, the hydraulic fractures were mainly horizontal fractures with a propagation distance of about 80 m on both sides of boreholes, the hard and complete roofs above the working face were effectively weakened, and regional roof reconstruction was achieved. The intensive ground pressure appearance of the working face was obviously reduced in the fracturing area, and production safety was ensured. Finally, the existing issues associated with hydraulic fracturing were discussed, and technical developments were envisaged.

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    • References (29)
  • [1]
    康红普,冯彦军. 煤矿井下水力压裂技术及在围岩控制中的应用[J]. 煤炭科学技术,2017,45(1):1−9. doi: 10.13199/j.cnki.cst.2017.01.001

    KANG Hongpu,FENG Yanjun. Hydraulic fracturing technology and its applications in strata control in underground coal mines[J]. Coal Science and Technology,2017,45(1):1−9. doi: 10.13199/j.cnki.cst.2017.01.001
    [2]
    康红普,姜鹏飞,冯彦军,等. 煤矿巷道围岩卸压技术及应用[J]. 煤炭科学技术,2022,50(6):1−15. doi: 10.13199/j.cnki.cst.2022-0467

    KANG Hongpu,JIANG Pengfei,FENG Yanjun,et al. Destressing technology for rock around coal mine roadways and its application[J]. Coal Science and Technology,2022,50(6):1−15. doi: 10.13199/j.cnki.cst.2022-0467
    [3]
    KANG Hongpu,LYU Huawen,GAO Fuqiang,et al. Understanding mechanisms of destressing mining-induced stresses using hydraulic fracturing[J]. International Journal of Coal Geology,2018,196:19−28. doi: 10.1016/j.coal.2018.06.023
    [4]
    冯彦军, 康红普. 定向水力压裂控制煤矿坚硬难垮顶板试验[J]. 岩石力学与工程学报, 2012, 31(6): 1148-1155.

    FENG Yanjun, KANG Hongpu. Test on hard and stable roof control by means of direction hydraulic fracturing in coal mine [J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(6): 1148-1155.
    [5]
    赵凯凯. 坚硬顶板区域水力压裂裂缝三维扩展机理研究[D]. 北京: 煤炭科学研究总院, 2021.

    ZHAO Kaikai. Three-dimensional propagation of hydraulic fracture from regional fracturing in hard roof[D]. Beijing: China Coal Research Institute, 2021.
    [6]
    ZHAO Kaikai,STEAD Doug,KANG Hongpu,et al. Investigating the interaction of hydraulic fracture with pre-existing joints based on lattice spring modeling[J]. Computers and Geotechnics,2020,122:103534. doi: 10.1016/j.compgeo.2020.103534
    [7]
    程利兴. 千米深井巷道围岩水力压裂应力转移机理研究及应用[D]. 北京: 中国矿业大学(北京), 2021.

    CHENG Lixing. Research and application of hydraulic fracturing stress transfer mechanism in surrounding rock of kilometer deep mine roadway[D]. Beijing: Beijing University of Mining & Technology- Beijing, 2021.
    [8]
    黄炳香,赵兴龙,陈树亮,等. 坚硬顶板水压致裂控制理论与成套技术[J]. 岩石力学与工程学报,2017,36(12):2954−2970. doi: 10.13722/j.cnki.jrme.2017.0078

    HUANG Bingxiang,ZHAO Xinglong,CHEN Shuliang,et al. Theory and technology of controlling hard roof with hydraulic fracturing in underground mining[J]. Chinese Journal of Rock Mechanics and Engineering,2017,36(12):2954−2970. doi: 10.13722/j.cnki.jrme.2017.0078
    [9]
    于 斌,高 瑞,夏彬伟,等. 大空间坚硬顶板地面压裂技术与应用[J]. 煤炭学报,2021,46(3):800−811.

    YU Bin,GAO Rui,XIA Binwei,et al. Ground fracturing technology and application of hard roof in large space[J]. Journal of China Coal Society,2021,46(3):800−811.
    [10]
    夏永学,陆 闯,杨光宇,等. 坚硬顶板孔内磨砂射流轴向切缝及压裂试验研究[J]. 采矿与岩层控制工程学报,2020,2(3):033522.

    XIA Yongxue,LU Chuang,YANG Guangyu,et al. Experimental study on axial fracture cutting and fracturing of abrasive jet in boreholes within hard rock roofs[J]. Journal of Mining and Strata Control Engineering,2020,2(3):033522.
    [11]
    张 晓. 综采工作面水力压裂初次放顶技术研究[J]. 煤炭科学技术,2017,45(7):23−26. doi: 10.13199/j.cnki.cst.2017.07.005

    ZHANG Xiao. Study on hydraulic fracturing technology in initial caving of fully-mechanized coal mining face[J]. Coal Science and Technology,2017,45(7):23−26. doi: 10.13199/j.cnki.cst.2017.07.005
    [12]
    冯彦军, 周瑜苍, 刘 勇, 等. [J].水力压裂在酸刺沟煤矿初次放顶中的应用[J]. 煤矿开采,2016(5):75−78.

    FENG Yanjun,ZHOU Yucang,LIU Yong,et al. Application of hydraulic fracturing in first roof caving of suancigou coal mine[J]. Coal Mining Technology,2016(5):75−78.
    [13]
    李中伟,薛旭辉,郝登云. 干河煤矿卸支耦合动压巷道围岩控制技术研究[J]. 煤炭工程,2019,51(11):51−54.

    LI Zhongwei,XUE Xuhui,HAO Dengyun. Surrounding rock control technology of pressure relief and support coupling dynamic pressure roadway in Ganhe Coal Mine[J]. Coal Engineering,2019,51(11):51−54.
    [14]
    吴拥政,康红普. 煤柱留巷定向水力压裂卸压机理及试验[J]. 煤炭学报,2017,42(5):1130−1137. doi: 10.13225/j.cnki.jccs.2016.1677

    WU Yongzheng,KANG Hongpu. Pressure relief mechanism and experiment of directional hydraulic fracturing in reused coal pillar roadway[J]. Journal of China Coal Society,2017,42(5):1130−1137. doi: 10.13225/j.cnki.jccs.2016.1677
    [15]
    杨俊哲,王振荣,吕情绪,等. 坚硬顶板超前区域治理技术在神东布尔台煤矿的应用[J]. 煤田地质与勘探,2022,50(2):17−23. doi: 10.12363/issn.1001-1986.21.03.0119

    YANG Junzhe,WANG Zhenrong,LYU Qingxu,et al. Application of advanced regional treatment technology of hard roof in Buertai Coal Mine of Shendong Coal Group[J]. Coal Geology & Exploration,2022,50(2):17−23. doi: 10.12363/issn.1001-1986.21.03.0119
    [16]
    刘曰武,高大鹏,李 奇,等. 页岩气开采中的若干力学前沿问题[J]. 力学进展,2019,49:201901. doi: 10.6052/1000-0992-17-020

    LIU Yuewu,GAO Dapeng,LI Qi,et al. Mechanical frontiers in shale-gas development[J]. Advances in Mechanics,2019,49:201901. doi: 10.6052/1000-0992-17-020
    [17]
    史 璨,林伯韬. 页岩储层压裂裂缝扩展规律及影响因素研究探讨[J]. 石油科学通报,2021,6(1):92−113. doi: 10.3969/j.issn.2096-1693.2021.01.008

    SHI Can,LIN Botao. Principles and influencing factors for shale formations[J]. Petroleum Science Bulletin,2021,6(1):92−113. doi: 10.3969/j.issn.2096-1693.2021.01.008
    [18]
    侯振坤,程汉列,海金龙,等. 页岩水力压裂裂缝起裂和扩展断裂力学模型[J]. 长江科学院院报,2020,37(5):99−107. doi: 10.11988/ckyyb.20190058

    HOU Zhenkun,CHENG Hanlie,HAI Jinlong,et al. Fracture mechanics model of the initiation and growth of hydraulic fissures[J]. Journal of Yangtze River Scientific Research Institute,2020,37(5):99−107. doi: 10.11988/ckyyb.20190058
    [19]
    张士诚,陈 铭,马新仿,等. 水力压裂设计模型研究进展与发展方向[J]. 新疆石油天然气,2021,17(3):67−73. doi: 10.3969/j.issn.1673-2677.2021.03.012

    ZHANG Shicheng,CHEN Ming,MA Xinfang,et al. Research progress and development direction of hydro fracturing design models[J]. Xinjiang Oil & Gas,2021,17(3):67−73. doi: 10.3969/j.issn.1673-2677.2021.03.012
    [20]
    赵凯凯,张 镇,李文洲,等. 基于XSite的钻孔起裂水力裂缝三维扩展研究[J]. 岩土工程学报,2021,43(8):1483−1491.

    ZHAO Kaikai,ZHANG Zhen,LI Wenzhou,et al. Three-dimensional simulation of hydraulic fracture from a borehole using XSite[J]. Chinese Journal of Geotechnical Engineering,2021,43(8):1483−1491.
    [21]
    HENG Shuai,LI Xianzhong,LIU Xiao,et al. Experimental study on the mechanical properties of bedding planes in shale[J]. Journal of Natural Gas Science and Engineering,2020,76:103161. doi: 10.1016/j.jngse.2020.103161
    [22]
    芮拥军. 地面微地震水力压裂监测可行性分析[J]. 物探与化探,2015,39(2):341−345. doi: 10.11720/wtyht.2015.2.21

    RUI Yongjun. Feasibility analysis of surface micro-seismic hydraulic fracturing monitoring[J]. Geophysical and Geochemical Exploration,2015,39(2):341−345. doi: 10.11720/wtyht.2015.2.21
    [23]
    CHAMBERS K,KENDALL J M,BRANDSBERG-DAHL S,et al. Testing the ability of surface arrays to monitor microseismic activity[J]. Geophysical Prospecting,2010,58(5):821−830. doi: 10.1111/j.1365-2478.2010.00893.x
    [24]
    EISNER L,HULSEY B J,DUNCAN P,et al. Comparison of surface and borehole locations of induced seismicity[J]. Geophysical Prospecting,2010,58(5):809−820. doi: 10.1111/j.1365-2478.2010.00867.x
    [25]
    梁北援,冷传波. 微破裂向量扫描原理的研发进展[J]. 地球物理学进展,2016,31(4):1620−1627.

    LIANG Beiyuan,LENG Chuanbo. Development of vector scanning for microseismic[J]. Progress in Geophysics,2016,31(4):1620−1627.
    [26]
    王维波,周瑶琪,春 兰. 地面微地震监测SET震源定位特性研究[J]. 中国石油大学学报(自然科学版),2012,36(5):45−50.

    WANG Weibo,ZHOU Yaoqi,CHUN Lan. Characteristics of source localization by seismic emission tomgraphy for surface based on microseismic monitoring[J]. Journal of China University of Petroleum(Edition of Natural Science),2012,36(5):45−50.
    [27]
    李晓斌,杨振威,赵秋芳,等. 微地震双差定位成像技术及煤层水力压裂的应用[J]. 煤炭学报,2019,44(S1):205−213. doi: 10.13225/j.cnki.jccs.2018.1280

    LI Xiaobin,YANG Zhenwei,ZHAO Qiufang,et al. Hydraulic fracture in coalbed methane drilling using microseism double-difference tomography method[J]. Journal of China Coal Society,2019,44(S1):205−213. doi: 10.13225/j.cnki.jccs.2018.1280
    [28]
    闫江平,庞长庆,段建华,等. 煤矿井下水力压裂范围微震监测技术及其影响因素[J]. 煤田地质与勘探,2019,47(S1):92−97. doi: 10.3969/j.issn.1001-1986.2019.S1.018

    YAN Jiangping,PANG Zhangqing,DUAN Jianhua,et al. Microseismic monitoring of underground hydraulic fracturing range in coal seam and analysis of influencing factors[J]. Coal Geology & Exploration,2019,47(S1):92−97. doi: 10.3969/j.issn.1001-1986.2019.S1.018
    [29]
    李 楠,王恩元,GE Mao-chen. 微震监测技术及其在煤矿的应用现状与展望[J]. 煤炭学报,2017,42(S1):83−96. doi: 10.13225/j.cnki.jccs.2016.0852

    LI Nan,WANG Enyuan,GE Maochen. Microseismic monitoring technique and its applications at coal mines: present status and future prospects[J]. Journal of China Coal Society,2017,42(S1):83−96. doi: 10.13225/j.cnki.jccs.2016.0852
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