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| Development of grouting simulation test system for rock mass fracture network and its application#br# |
| LIU Bin1，SANG Haomin1，2，KANG Yongshui1，LIU Quansheng3，LUO Ciyou1，2，ZHAO Cheng4 |
(1. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China； 2. University of Chinese Academy of Sciences，Beijing 100049，China；3. Key Laboratory of Safety for Geotechnical and Structural Engineering of Hubei Province，Wuhan University，Wuhan，Hubei 430072，China；
4. School of Civil Engineering and Architecture，Anhui University of Science and Technology，Huainan，Anhui 232001) |
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Abstract To study the diffusion and migration pattern of grouts in rock mass fracture network，a visual fracture constant pressure grouting test system，consisting of pressure supply equipment，constant pressure pumping equipment，fracture simulation equipment and monitoring equipment，was developed. The system can design a specific fracture network according to test requirements to simulate the grout flow process under various parameters such as grouting pressure，grout viscosity and fracture aperture and to investigate the grout-water/gas displacement mechanism in fractured rock mass. The reliability of the test system was proved by the comparison of the test results with the single fracture grouting theory，and the grouting diffusion mechanism of random fracture network was studied. The results show that the pressure at the same point in the fracture increases with increasing the grouting pressure or decreasing the fracture aperture but is not affected by the change of the grout viscosity，and that，after the grout is dispersed into several branches in the fracture network，the pressure drops significantly and the flow velocity slows down. It is also shown that the pressure of each branch and the flow distribution coefficient are greatly affected by the angle of the bifurcation (intersection) fracture. The test system and the study results have certain reference for the grouting engineering.
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[1]KANG Y S，LIU Q S，XI H L，et al. Improved compound support system for coal mine tunnels in densely faulted zones：A case study of Chinas Huainan coal field[J]. Engineering Geology，2018，240：10–20.
[2]BAKER C. Comments on paper rock stabilization in rock mechanics[M]. NY：Springer-Verlag NY，1974，22–38.
[3]刘嘉材. 裂缝灌浆扩散半径研究[C]// 中国水利水电科学院科学研究论文集. 北京：水利出版社，1982：186–195.(LIU Jiacai. Study on the diffusion radius of crack grouting[C]// Proceedings of the Chinese Academy of Water Resources and Hydropower Research. Beijing：Water Press，1982：186–195.(in Chinese))
[4]张良辉. 岩土灌浆渗流机制及渗流力学[博士学位论文][D]. 北京：北京交通大学，1996.(ZHANG Lianghui. Seepage mechanism and seepage mechanics of rock and soil grouting[Ph. D. Thesis][D]. Beijing：Beijing Jiaotong University，1996.(in Chinese))
[5]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)：1 198–1 210.(ZHANG Qingsong，ZHANG Lianzhen，ZHANG Xiao，et al. Grouting diffusion mechanism in horizontal crack based on temporal and spatial variation of viscosity[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(06)：1 198–1 210.(in Chinese))
[6]宗义江，韩立军，韩贵雷. 破裂岩体承压注浆加固力学特性试验研究[J]. 采矿与安全工程学报，2013，30(4)：483–488.(ZONG Yijiang，HAN Lijun，HAN Guilei. Mechanical characteristics of confined grouting reinforcement for cracked rock mass[J]. Journal of Mining and Safety Engineering，2013，30(04)：483–488.(in Chinese))
[7]FEDER G. 起始灌浆压力[C]// 岩石与混凝土灌浆译文集. 中国岩石力学与工程学会，1995：287–290.(FEDER G. Initial grouting pressure[C]// Rock and concrete grout translation set. Chinese Society for Rock Mechanics & Engineering，1995：287–290.(in Chinese))
[8]JAMSON T，STILLE H. 岩石劈裂注浆—实例研究[C]// 现代灌浆译文集. 1991：279-286.(JAMSON T，STILLE H. Rock splitting grouting—case study[C]// Modern grout translation set.，1991：279–286.(in Chinese))
[9]徐志鹏. 高压裂隙注浆试验台研制及塑性早强浆材注浆试验研究[硕士学位论文][D]. 北京：煤炭科学研究总院，2009.(XU Zhipeng. A model tester for grouting simulation high pressure in rock fissure and model experimental research on plastic and early strength grout by grouting simulation[M. S. Thesis][D]. Beijing：China Coal Research Institute CCRI，2009.(in Chinese))
[10]张伟杰，李术才，魏久传，等. 三维注浆模型试验系统研制及应用[J]. 岩土力学，2016，37(3)：902–911.(ZHANG Weijie，LI Shucai，WEI Jiuchuan，et al. Development of a 3D grouting model test system and its application[J]. Rock and Soil Mechanics，2016，37(3)：902–911.(in Chinese))
[11]张伟杰，李术才，魏久传，等. 富水破碎岩体帷幕注浆模型试验研究[J]. 岩土工程学报，2015，37(9)：1 627–1 634.(ZHANG Weijie，LI Shucai，WEI Jiuchuan，et al. Model tests on curtain grouting in water-rich broken rock mass[J]. Chinese Journal of Geotechnical Engineering，2015，37(09)：1 627–1 634.(in Chinese))
[12]徐志鹏. 裂隙岩石注浆模拟试验的研究进展[C]// 科技创新与化学灌浆论文集. 武汉：长江出版社，2008，174–180.(XU Zhipeng. Research progress on simulation test of fractured rock grouting[C]// Technological innovation and chemical grouting. Wuhan：Changjiang Press，2008，174–180.(in Chinese))
[13]湛铠瑜. 单一裂隙动水注浆模拟试验研究[硕士学位论文][D]. 徐州：中国矿业大学，2010.(ZHAN Kaiyu. Experimental simulation of grouting into single fracture with flowing water[M. S. Thesis][D]. Xuzhou：China University of Mining and Technology，2010.(in Chinese))
[14]杨 坪，陈 安. 均匀设计在室内大型注浆试验研究中的应用[J]. 探矿工程，2006，(3)：9–11.(YANG Ping，CHEN An. Application of Uniform Design in Grouting Experiment[J]. Exploration Engineering Media，2006，(3)：9–11.(in Chinese))
[15]阮文军. 基于浆液黏度时变性的岩体裂隙注浆扩散模型[J]. 岩石力学与工程学报，2005，(15)：2 709–2 714.(RUAN Wenjun. Spreading modeling of grouting in rock mass fissures based on time-dependent behavior of viscosity of cement-based grouts[J]. Chinese Journal of Rock Mechanics and Engineering，2005，(15)：2 709–2 714.(in Chinese))
[16]刘人太. 水泥基速凝浆液地下工程动水注浆扩散封堵机制及应用研究[博士学位论文][D]. 济南：山东大学，2012.(LIU Rentai. Study on diffusion and plugging mechanism of quick setting cement based slurry in underground dynamic water grouting and its application[Ph. D. Thesis][D]. Jinan：Shandong University，2012.(in Chinese))
[17]HÄSSLER L，HÅKANSSON U，STILLE H. Computer-simulated flow of grouts in jointed rock[J]. Tunnelling and Underground Space Technology，1992，7(4)：441–446.
[18]郑长成. 裂隙岩体灌浆的模拟研究[博士学位论文][D]. 长沙：中南工业大学：1999.(ZHENG Changcheng. Simulation study on grouting of fractured rock mass[Ph. D. Thesis][D]. Changsha：Central South University，1999.(in Chinese))
[19]郑玉辉. 裂隙岩体注浆浆液与注浆控制方法的研究[博士学位论文] [D]. 长春：吉林大学，2005.(ZHENG Yuhui. Research on grouts controllable method of grouting in rock mass of the fissures[Ph. D. Thesis][D]. Changchun：Jilin university，2005.(in Chinese))
[20]刘泉声，卢超波，刘 滨，等. 考虑温度及水化时间效应的水泥浆液流变特性研究[J]. 岩石力学与工程学报，2014，33(增2)：3 730– 3 740.(LIU Quansheng，LU Chaobo，LIU Bin，et al. Research on rheological behavior for cement grout considering temperature and hydration time effects[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(Supp.2)：3 730–3 740.(in Chinese)) |
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2020, Vol. 39 
