Advance Search

CHEN Juntao,LI Hao,JIA Dongxiu,et al. Experimental study on grouting reinforcement characteristics of limestone with different length cracks under fluid solid coupling[J]. Coal Science and Technology,2024,52(3):189−199

. DOI: 10.13199/j.cnki.cst.2023-0338
Citation:

CHEN Juntao,LI Hao,JIA Dongxiu,et al. Experimental study on grouting reinforcement characteristics of limestone with different length cracks under fluid solid coupling[J]. Coal Science and Technology,2024,52(3):189−199

. DOI: 10.13199/j.cnki.cst.2023-0338

Experimental study on grouting reinforcement characteristics of limestone with different length cracks under fluid solid coupling

Funds: 

National Natural Science Foundation of China (51974172); Shandong Provincial Natural Science Foundation (ZR2022ME140); Funding Project of State Key Laboratory of High-efficiency Mining and Clean Utilization of Coal Resources (2021-CMCU-KF015)

More Information
  • Received Date: February 04, 2023
  • Accepted Date: March 24, 2023
  • Available Online: March 12, 2024
  • It is difficult to fully develop coal resources in the north of the Yellow River due to the influence of mine water disaster. Grouting technology is an important means to solve the problem of mine water disasters at present. The in-depth study of grouting technology can not only liberate a large number of coal resources threatened by water disasters, but also have positive significance for the protection of groundwater resources. Laboratory tests were conducted on limestone samples obtained from Qiuji Coal Mine in the Yellow River North Coalfield to observe the microscopic characteristics of the limestone. The mechanical properties and grouting reinforcement characteristics of limestone with different lengths of cracks under fluid solid coupling were obtained. Through theoretical analysis, the variation law of the cracking strength of limestone with the change of prefabricated crack length was obtained, and the grouting reinforcement mechanism was analyzed. The test results show that the strength and toughness of the rock after grouting have been significantly improved, the limestone before grouting has obvious brittleness characteristics, and the brittleness of the limestone after grouting has decreased and the ductility has increased; The damage degree of grouting plus solid is more and more severe with the increase of crack length. When the crack length is large, it is accompanied by horizontal fracture development; The pre-peak permeability of grouting plus solid decreases slightly, and the post-peak permeability decreases significantly. The maximum stage of limestone permeability occurs in the post-peak stage, while the minimum stage of permeability occurs in the linear elastic stage of the stress-strain curve. The longer the fracture length, the easier the double-peak phenomenon of permeability appears. Based on the theory of continuous medium mechanics, the formulas for calculating the crack initiation strength and fracture toughness of grouting plus solid are derived. It is theoretically proved that the strength of grouting plus solid is greater than that of the original rock sample; The greater the difference between the elastic modulus of rock and the elastic modulus of the combination formed by grouting, the weaker the impact of grouting on rock strength.

  • [1]
    陈军涛,武 强,尹立明,等. 高承压水上底板采动岩体裂隙演化规律研究[J]. 煤炭科学技术,2018,46(7):54−60.

    CHEN Juntao,WU Qiang,YIN Liming,et al. Law of crack evolution in floor rock mass above high confined water[J]. Coal Science and Technology,2018,46(7):54−60.
    [2]
    乔 伟,李文平. 地应力对岩溶裂隙含水介质渗透特性的影响[J]. 中国矿业大学学报,2011,40(1):73−79.

    QIAO Wei,LI Wenping. Effect of geo-stress on permeability of groundwater in karst-fractured rock mass[J]. Journal of China University of Mining & Technology,2011,40(1):73−79.
    [3]
    陈军涛,郭惟嘉,尹立明,等. 深部开采底板裂隙扩展演化规律试验研究[J]. 岩石力学与工程学报,2016,35(11):2298−2306.

    CHEN Juntao,GUO Weijia,YIN Liming,et al. Experimental study of floor cracking under deep mining[J]. Chinese Journal of Rock Mechanics and Engineering,2016,35(11):2298−2306.
    [4]
    YIN L M,MA K,CHEN J T,et al. Mechanical model on water inrush assessment related to deep mining above multiple aquifers[J]. Mine Water and the Environment,2019,38(4):827−836. doi: 10.1007/s10230-019-00623-3
    [5]
    曾一凡,梅傲霜,武 强,等. 基于水化学场与水动力场示踪模拟耦合的矿井涌(突)水水源判识[J]. 煤炭学报,2022,47(12):4482−4494.

    ZENG Yifan,MEI Aoshuang,WU Qiang,et al. Source discrimination of mine water inflow or inrush using hydrochemical field and hydrodynamic field tracer simulation coupling[J]. Journal of China Coal Society,2022,47(12):4482−4494.
    [6]
    曾一凡,武 强,赵苏启,等. 我国煤矿水害事故特征、致因与防治对策[J]. 煤炭科学技术,2023,51(7):1−14. doi: 10.13199/j.cnki.cst.2023-0500

    ZENG Yifan,WU Qiang,ZHAO Suqi,et al. Characteristics, causes, and prevention measures of coal mine water hazard accidents in China[J]. Coal Science and Technology,2023,51(7):1−14. doi: 10.13199/j.cnki.cst.2023-0500
    [7]
    尹尚先,徐 斌,尹慧超,等. 矿井水防治学科基本架构及内涵[J]. 煤炭科学技术,2023,51(7):24−35. doi: 10.13199/j.cnki.cst.2023-0477

    YIN Shangxian,XU Bin,YIN Huichao,et al. Basic structure and connotation of mine water prevention and control discipline[J]. Coal Science and Technology,2023,51(7):24−35. doi: 10.13199/j.cnki.cst.2023-0477
    [8]
    ZENG Y F,MENG S H,WU Q,et al. Ecological water security impact of large coal base development and its protection[J]. Journal of Hydrology,2023,619:129319. doi: 10.1016/j.jhydrol.2023.129319
    [9]
    曾一凡,刘晓秀,武 强,等. 双碳背景下“煤–水−热”正效协同共采理论与技术构想[J]. 煤炭学报,2023,48(2):538−550.

    ZENG Yifan,LIU Xiaoxiu,WU Qiang,et al. Theory and technical conception of coal-water-thermal positive synergistic co-extraction under the dual carbon background[J]. Journal of China Coal Society,2023,48(2):538−550.
    [10]
    王 海,董书宁,孙亚军,等. 我国大水矿山侧向帷幕截水技术及水资源保护效果研究[J]. 煤炭科学技术,2023,51(7):207−223. doi: 10.13199/j.cnki.cst.QN21-014

    WANG Hai,DONG Shuning,SUN Yajun,et al. Lateral curtain interception technology and water conservation effect in groundwater abundant mines of China[J]. Coal Science and Technology,2023,51(7):207−223. doi: 10.13199/j.cnki.cst.QN21-014
    [11]
    国家煤矿安全监察局. 煤矿防治水细则[M]. 北京:煤炭工业出版社,2018.
    [12]
    徐靖南,朱维申,白世伟. 压剪应力作用下多裂隙岩体的力学特性–本构模型[J]. 岩土力学,1993(4):1−15.

    XU Jingnan,ZHU Weishen,BAI Shiwei. Multi-crack rock mass mechanical character under the state of compression-shearing-constitutive model[J]. Rock and Soil Mechanics,1993(4):1−15.
    [13]
    ZENG Y F,WU Q,LIU S,et al. Evaluation of a coal seam roof water inrush:case study in the Wangjialing Coal Mine,China[J]. Mine Water Environ,2018,37:174−184. doi: 10.1007/s10230-017-0459-z
    [14]
    USMANI A,KANNAN G,NANDA A,et al. Seepage behavior and grouting effects for large rock vaverns[J]. International Journal of Geomechanics,2014,15(3):06014023.
    [15]
    刘人太,郑 卓,李术才,等. 破碎岩体注浆加固后的力学特性研究[J]. 中国公路学报,2018,31(10):284−291.

    LIU Rentai,ZHENG Zhuo,LI Shucai,et al. Mechanical properties of fractured rock mass with consideration of grouting reinforcement[J]. China Journal of Highway and Transport,2018,31(10):284−291.
    [16]
    ZENG Y F,PANG Z Z,WU Q,et al. Study of water-controlled and environmentally friendly coal mining models in an ecologically fragile area of northwest China[J]. Mine Water and the Environment,2022,41:802−816. doi: 10.1007/s10230-022-00871-w
    [17]
    徐树媛,张永波,时 红,等. 采空区冒落带内破碎岩体的渗流特征与渗透性试验研究[J]. 安全与环境工程,2022,29(1):128−134.

    XU Shuyuan,ZHANG Yongbo,SHI Hong,et al. Flow characteristics and experimental study on the permeability of mining-induced fractured rock mass in caving zones[J]. Safety and Environmental Engineering,2022,29(1):128−134.
    [18]
    杨米加. 随机裂隙岩体注浆渗流机理及其加固后稳定性分析[J]. 岩石力学与工程学报,2000(4):541.

    YANG Mijia. Mechanism of grout penetrating in stochastic fractured rock mass and its stability analysis after reinforcement[J]. Chinese Journal of Rock Mechanics and Engineering,2000(4):541.
    [19]
    刘泉声,周越识,卢超波,等. 含裂隙泥岩注浆前后力学特性试验研究[J]. 采矿与安全工程学报,2016,33(3):509−514,520.

    LIU Quansheng,ZHOU Yueshi,LU Chaobo,et al. Experimental study on mechanical properties of mudstone fracture before and after grouting[J]. Journal of Mining & Safety Engineering,2016,33(3):509−514,520.
    [20]
    王 志,秦文静,张丽娟. 含裂隙岩石注浆加固后静动态力学性能试验研究[J]. 岩石力学与工程学报,2020,39(12):2451−2459.

    WANG Zhi,QIN Wenjing,ZHANG Lijuan. Experimental study on static and dynamic mechanical properties of cracked rock after grouting reinforcement[J]. Chinese Journal of Rock Mechanics and Engineering.,2020,39(12):2451−2459.
    [21]
    王 志,李 龙. 含裂隙岩石注浆加固后的弯曲疲劳性能试验研究[J]. 岩石力学与工程学报,2018,37(8):1823−1832.

    WANG Zhi,LI Long. Experimental study on bending fatigue behavior of grouting reinforced rock with fracture[J]. Chinese Journal of Rock Mechanics and Engineering,2018,37(8):1823−1832.
    [22]
    卢海峰,曹爱德,刘泉声,等. 含内缺陷注浆固结体力学特性试验研究[J]. 岩石力学与工程学报,2020,39(8):1560−1571.

    LU Haifeng,CAO Aide,LIU Quansheng,et al. Experimental study on mechanical properties of grouting consolidating bodies with inner defects[J]. Chinese Journal of Rock Mechanics and Engineering,2020,39(8):1560−1571.
    [23]
    沈 君,刘保国,陈 景,等. 辉绿岩裂隙注浆体力学特性试验研究[J]. 岩石力学与工程学报,2020,39(S1):2804−2817.

    SHEN Jun,LIU Baoguo,CHEN Jing,et al. Experimental study on mechanical properties of diabase fracture-grouting mass[J]. Chinese Journal of Rock Mechanics and Engineering,2020,39(S1):2804−2817.
    [24]
    CHEN J T,ZHAO J H,ZHANG S C,et al. An experimental and analytical research on the evolution of mining cracks in deep floor rock mass[J]. Pure And Applied Geophysics,2020,177(11):‏5325–5348.
    [25]
    蒲 诚,刘奉银,陈蕴生. 非贯通裂隙岩体试件峰后力学特性的研究[J]. 实验力学,2020,35(6):1121−1128.

    PU Cheng,LIU Fengyin,CHEN Yunshen. The study on post-peak mechanical properties of non-penetrating rock-like specimen[J]. Journal of Experimental Mechanics,2020,35(6):1121−1128.
    [26]
    中华人民共和国国家标准. SL/T 264–2020水电水利工程岩石试验规程[S]. 北京:中国水利水电出版社,2020.

    The professional standard compilation group of people's republic of China. SL264—2020 Specifications for rock tests in water conservancy and hydroelectric engineering[S]. Beijing:China Water&Power Press,2020.
    [27]
    王如宾,徐 波,徐卫亚,等. 不同卸荷路径对砂岩渗透性演化影响的试验研究[J]. 岩石力学与工程学报,2019,38(3):467−475.

    WANG Rubin,XU Bo,XU Weiya,et al. Experimental research on influence of different unloading stress paths on permeability evolution for sandstone[J]. Chinese Journal of Rock Mechanics and Engineering,2019,38(3):467−475.
    [28]
    张培森,赵成业,侯季群,等. 温度–应力–渗流耦合条件下红砂岩渗流特性试验研究[J]. 岩石力学与工程学报,2020,39(10):1957−1974.

    ZHANG Peisen,ZHAO Chengye,HOU Jiqun,et al. Experimental study on seepage characteristics of deep sandstone under temperature-stress-seepage coupling conditions[J]. Chinese Journal of Rock Mechanics and Engineering,2020,39(10):1957−1974.
    [29]
    刘江峰,倪宏阳,浦 海,等. 多孔介质气体渗透率测试理论、方法、装置及应用[J]. 岩石力学与工程学报,2021,40(1):137−146.

    LIU Jiangfeng,NI Hongyang,PU Hai,et al. Test theory,method and device of gas permeability of porous media and the application[J]. Chinese Journal of Rock Mechanics and Engineering,2021,40(1):137−146.
    [30]
    寇苗苗. 卸荷渗流耦合作用下裂隙岩体破坏机理研究[D]. 重庆:重庆大学,2019.

    KOU Miaomiao. Study on the failure mechanism of fractured rock masses under the coupled hydro-mechanical loading and unloading conditions[D]. Chongqing:Chongqing University,2019.
    [31]
    CHEN J T,ZHANG Y,TANG D Z,et al. Analysis of mining crack evolution in deep floor rock mass with fault[J]. Geofluids,2021,5583877.
    [32]
    周群力. 岩石压剪断裂判据及其应用[J]. 岩土工程学报,1987(3):33−37.

    ZHOU Qunli. Compress shear fracture criterion of rock and it’s application[J]. Chinese Journal of Geotechnical Engineering,1987(3):33−37.
    [33]
    INGLIS CE. Stress in a plane due to the presence of cracks and sharp corners[J]. Transactions of Institution of Naval Architects,1913,55:219−230.

Catalog

    Article views (97) PDF downloads (33) Cited by()
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return