| Citation: |
ZHAI Minglei，BAI Haibo. Research on the mechanism of fracture grouting diffusion and its application based on slurry-rock mass coupling effect[J]. Coal Science and Technology，2024，52（7）：158−167. DOI: 10.12438/cst.2023-1239
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The deep mining process of North China type coalfields is highly threatened by the threat of water damage from the floor limestone aquifer. By arranging grouting holes reasonably to inject a large amount of slurry into the aquifer that directly threatens the safety of coal seam mining, making the strong aquifer a weak aquifer or an impermeable layer is the main means to solve such water damage problems. In microfracture grouting engineering, the slurry-rock mass coupling effect has a significant impact on the diffusion process of slurry. To this end, the interaction between slurry and rock mass and the diffusion mechanism of slurry during high-pressure grouting of coal seam floor aquifers was studied, a single fracture grouting diffusion theoretical model was established that considers the slurry flow-rock mass deformation coupling effect, based on the viscosity time varying Bingham slurry diffusion equation and fracture aperture control equation. The spatial distribution characteristics of slurry pressure and fracture aperture in the slurry diffusion direction were analyzed, and the effect rules of slurry-rock mass coupling effect on slurry diffusion was revealed, and the results were compared with the grouting model with constant fracture aperture. The results showed that the attenuation trend of slurry pressure and fracture aperture in the slurry diffusion direction was consistent, and both had obvious nonlinear characteristics, and the attenuation was faster in the fracture entrance area. The degree of slurry-rock mass coupling effect decreased with the increase of fracture aperture, and the design value of grouting pressure will be too high if fracture aperture was small and the slurry-rock mass coupling effect was not considered. The grouting pressure became the main controlling factor affecting the slurry diffusion distance gradually as the fracture aperture increased. By comparing the theoretical results with an example of grouting transformation of the limestone aquifer in the lower coal seam floor of Luxi coal mine, the validity of the theoretical model was verified.
| [1] |
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.
|
| [2] |
虎维岳,赵春虎,吕汉江. 煤层底板水害区域注浆治理影响因素分析与高效布孔方式[J]. 煤田地质与勘探,2022,50(11):134−143.
HU Weiyue,ZHAO Chunhu,LYU Hanjiang. Main influencing factors for regional pre-grouting technology of water hazard treatment in coal seam floor and efficient hole arrangement[J]. Coal Geology & Exploration,2022,50(11):134−143.
|
| [3] |
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
|
| [4] |
施龙青,邱梅,牛超,等. 肥城煤田奥灰顶部注浆加固可行性分析[J]. 采矿与安全工程学报,2015,32(3):356−362.
SHI Longqing,QIU Mei,NIU Chao,et al. Feasibility analysis of grouting reinforcement of Ordovician top in Feicheng coalfield[J]. Journal of Mining & Safety Engineering,2015,32(3):356−362.
|
| [5] |
张二蒙,沈星宇,苗葳,等. 奥灰顶部含水层注浆改造浆液扩散主要影响因素试验研究[J]. 煤炭学报,2021,46(11):3536−3549.
ZHANG Ermeng,SHEN Xingyu,MIAO Wei,et al. Experimental study on the influence of grouting diffusion in fissure aquifer at the top Ordovician limestone[J]. Journal of China Coal Society,2021,46(11):3536−3549.
|
| [6] |
郭艳,桂和荣,魏久传,等. 区域注浆扰动下渗流场−化学场演化及耦合作用[J]. 煤炭科学技术,2023,51(7):152−166.
GUO Yan,GUI Herong,WEI Jiuchuan,et al. Evolution and coupling of “seepage field and chemical field” under regional grouting disturbance[J]. Coal Science and Technology,2023,51(7):152−166.
|
| [7] |
胡少银,刘泉声,李世辉. 裂隙岩体注浆理论研究进展及展望[J]. 煤炭科学技术,2022,50(1):105−111.
HU Shaoyin,LIU Quansheng,LI Shihui. Advance and review on grouting critical problems in fractured rock mass[J]. Coal Science and Technology,2022,50(1):105−111.
|
| [8] |
隋旺华. 矿山采掘岩体渗透变形灾变机理及防控Ⅲ:防水闸墙围岩[J]. 煤炭科学技术,2023,51(7):36−43. doi: 10.13199/j.cnki.cst.2022-2138
SUI Wanghua. Catastrophic mechanism and its prevention and control of seepage deformation and failure of mining rock mass Ⅲ[J]. Coal Science and Technology,2023,51(7):36−43. doi: 10.13199/j.cnki.cst.2022-2138
|
| [9] |
张庆松,张连震,刘人太,等. 水泥-水玻璃浆液裂隙注浆扩散的室内试验研究[J]. 岩土力学,2015,36(8):2159−2168.
ZHANG Qingsong,ZHANG Lianzhen,LIU Rentai,et al. Laboratory experimental study of cement-silicate slurry diffusion law of crack grouting with dynamic water[J]. Rock and Soil Mechanics,2015,36(8):2159−2168.
|
| [10] |
董书宁,柳昭星,王皓,等. 导水断层破碎带注浆浆液扩散机制试验研究[J]. 采矿与安全工程学报,2022,39(1):174−183.
DONG Shuning,LIU Zhaoxing,WANG Hao,et al. Experimental study on serum diffusion mechanism during grouting in water conducting fault fracture zone[J]. Journal of Mining & Safety Engineering,2022,39(1):174−183.
|
| [11] |
柳昭星,董书宁,王 皓. 倾斜裂隙水平孔注浆浆液扩散规律[J]. 煤炭学报,2022,47(S1):135−151.
LIU Zhaoxing,DONG Shuning,WANG Hao. Law of grout diffusion of horizontal hole grouting in inclined crack[J]. Journal of China Coal Society,2022,47(S1):135−151.
|
| [12] |
张庆松,张连震,张霄,等. 基于浆液黏度时空变化的水平裂隙岩体注浆扩散机制[J]. 岩石力学与工程学报,2015,34(6):1198−1210.
ZHANG Qingsong,ZHANG Lianzhen,ZHANG Xiao,et al. Grouting diffusion in a horizontal crack considering temporal and spatial variation of viscosity[J]. Chinese Journal of Rock Mechanics and Engineering,2015,34(6):1198−1210.
|
| [13] |
尚宏波,王皓. 裂隙岩体水平孔注浆浆液扩散规律研究[J]. 煤炭科学技术,2022,50(7):233−243.
SHANG Hongbo,WANG Hao. Study on diffusion law of grouting slurry in horizontal hole in fractured rock mass[J]. Coal Science and Technology,2022,50(7):233−243.
|
| [14] |
ZHAI M L,MA D,BAI H B. Diffusion mechanism of slurry during grouting in a fractured aquifer:a case study in Chensilou Coal Mine,China[J]. Mathematics,2022,10(8):1345. doi: 10.3390/math10081345
|
| [15] |
李术才,郑卓,刘人太,等. 考虑浆−岩耦合效应的微裂隙注浆扩散机制分析[J]. 岩石力学与工程学报,2017,36(4):812−820.
LI Shucai,ZHENG Zhuo,LIU Rentai,et al. Analysis on fracture grouting mechanism considering grout-rock coupling effect[J]. Chinese Journal of Rock Mechanics and Engineering,2017,36(4):812−820.
|
| [16] |
RAFI J Y,STILLE H. Basic mechanism of elastic jacking and impact of fracture aperture change on grout spread,transmissivity and penetrability[J]. Tunnelling and Underground Space Technology,2015,49:174−187. doi: 10.1016/j.tust.2015.04.002
|
| [17] |
郑卓,李术才,刘人太,等. 裂隙岩体注浆中的浆液-岩体耦合效应分析[J]. 岩石力学与工程学报,2015,34(S2):4054−4062.
ZHENG Zhuo,LI Shucai,LIU Rentai,et al. Analysis of coupling effect between grout and rock mass during jointedrock grouting[J]. Chinese Journal of Rock Mechanics and Engineering,2015,34(S2):4054−4062.
|
| [18] |
阮文军. 注浆扩散与浆液若干基本性能研究[J]. 岩土工程学报,2005,27(1):69−73. doi: 10.3321/j.issn:1000-4548.2005.01.011
RUAN Wenjun. Research on diffusion of grouting and basic properties of grouts[J]. Chinese Journal of Geotechnical Engineering,2005,27(1):69−73. doi: 10.3321/j.issn:1000-4548.2005.01.011
|
| [19] |
徐斌,董书宁,尹尚先,等. 倾斜裂隙中宾汉姆流体非稳定浆液运移机理[J]. 煤炭学报,2022,47(11):4083−4093.
XU Bin,DONG Shuning,YIN Shangxian,et al. Mechanism of inclined fracture slurry transport based on non-stable Bingham fluid[J]. Journal of China Coal Society,2022,47(11):4083−4093.
|
| [20] |
张庆松,张连震,刘人太,等. 基于“浆−土”界面应力耦合效应的劈裂注浆理论研究[J]. 岩土工程学报,2016,38(2):323−330.
ZHANG Qingsong,ZHANG Lianzhen,LIU Rentai,et al. Split grouting theory based on slurry-soil coupling effects[J]. Chinese Journal of Geotechnical Engineering,2016,38(2):323−330.
|
| [21] |
李术才,刘人太,张庆松,等. 基于黏度时变性的水泥–玻璃浆液扩散机制研究[J]. 岩石力学与工程学报,2013,32(12):2415−2421.
LI Shucai,LIU Rentai,ZHANG Qingsong,et al. Research on C-S slurry diffusion mechanism with time-dependent behavior of viscosity[J]. Chinese Journal of Rock Mechanics and Engineering,2013,32(12):2415−2421.
|
| [22] |
ZHAI M L,BAI H B,WU L Y,et al. A reinforcement method of floor grouting in high-water pressure working face of coal mines:a case study in Luxi coal mine,North China[J]. Environmental Earth Sciences,2022,81(28):1−17.
|
| [23] |
张连震,张庆松,刘人太,等. 基于浆液-岩体耦合效应的微裂隙岩体注浆理论研究[J]. 岩土工程学报,2018,40(11):2003−2011.
ZHANG Lianzhen,ZHANG Qingsong,LIU Rentai,et al. Grouting mechanism in fractured rock considering slurry-rock stress coupling effects[J]. Chinese Journal of Geotechnical Engineering,2018,40(11):2003−2011.
|
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