采空区破碎岩体负压注浆加固试验研究与机制分析

doi:10.13722/j.cnki.jrme.2022.0630

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Abstract Grouting is not only an effective method to address the high stresses and large deformations of surrounding rock in deep mining，but is also a key technology for green and low-carbon mining. Accordingly，this study conducted uniaxial compression tests on grouting reinforcement with different negative pressure pressures to explore the reinforcement effect of negative pressure grouting. It analyzed the effects of slurry flow effect of porous media on the mechanical properties of grouting and solid. Moreover，we investigated the relations of the physical parameters，specimen?s strength，deformation in different samples under different negative pressures and examined the sample failure modes drawing the following conclusions based on the present compression test results. First，the effect of the four forces on the negative pressure grouting results in the reinforcement mechanical properties being affected by four factors as the actual situation of the broken rock mass differs from the theory. Secondly，as the negative pressure is increased，a triple change in the water-cement ratio，porosity，and doping of the specimen occurs. The density of the specimen shows a trend of first increasing and then decreasing，exhibiting a three-stage character，with the porosity of the specimen continuing to decrease. Thirdly，the stress-strain curve of the specimen reinforced by negative pressure grouting shows four stages of change of which the strength and elastic modulus of the specimen showed a trend of first a rise and then a decrease，while the mean curve of the axial strain shows a first decrease and then a rise. It can be determined that the negative pressure of 60 kPa is the threshold value of negative pressure grouting reinforcement. Then，the difference between negative pressure grouting pressure makes the internal structure of the specimen different，and finally shows three types of failure modes. Finally，the negative pressure grouting process is affected by four factors. It is necessary to take into account not only the hydration reaction of the slurry，but also the characteristics of the liquid bridge at the solid-liquid interface，and at the same time the pore changes and vacuum dehydration effects during the grouting process. The results are of great reference to improve the grouting reinforcement process and provide a theoretical and experimental basis for clean，efficient and stable coal mining.

Key words： mining engineering grouting reinforcement negative pressure grouting broken rock mass hydration reaction vacuum dehydration

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	Articles by authors
	LYU Xin1
	YANG Ke2
	FANG Juejing1
	DUAN Minke1
	2
	WANG Yu1
	ZHANG Zhainan1

Cite this article:

LYU Xin1,YANG Ke2,FANG Juejing1, et al. Experimental study and mechanism analysis of negative pressure grouting reinforcement for broken rock mass in goaf[J]. , 2023, 42(S2): 4174-4188.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.0630 OR https://rockmech.whrsm.ac.cn/EN/Y2023/V42/IS2/4174

[1] 李繁荣，郭丕斌，齐晓燕. 以能源生产和消费革命推进绿色发展—基于马克思人与自然物质变换思想的研究[J]. 经济问题，2018，(10)：8–16.(LI Fanrong，GUO Pibin，QI Xiaoyan. Promoting green development with the revolution in energy production and consumption：A study based on marx?s thought of material transformation between human beings and nature[J]. On Economic Problems，2018，(10)：8–16.(in Chinese))
[2] LYU X，YANG K，FANG J J. Utilization of resources in abandoned coal mines for carbon neutrality[J]. Science of the Total Environment，2022，822：153646.
[3] 康红普，姜鹏飞，黄炳香，等. 煤矿千米深井巷道围岩支护–改性–卸压协同控制技术[J]. 煤炭学报，2020，45(3)：845–864.(KANG Hongpu，JIANG Pengfei，HUANG Bingxiang，et al. Roadway strata control technology by means of bolting-modification-destressing in synergy in 1 000 m deep coal mines[J]. Journal of China Coal Society，2020，45(3)：845–864.(in Chinese))
[4] 张振峰，康红普，姜志云，等. 千米深井巷道高压劈裂注浆改性技术研发与实践[J]. 煤炭学报，2020，45(3)：972–981.(ZHANG Zhenfeng，KANG Hongpu，JIANG Zhiyun，et al. Study and application of high-pressure splitting grouting modification technology in coalmine with depth more than 1 000 m[J]. Journal of China Coal Society，2020，45(3)：972–981.(in Chinese))
[5] 周晓敏，徐衍，刘书杰，等. 金矿超深立井含水围岩注浆加固的应力场和渗流场研究[J]. 岩石力学与工程学报，2020，39(8)：   1 611–1 621.(ZHOU Xiaomin，XU Yan，LIU Shujie，et al. Research on stress and seepage fields of surrounding rock grouting of ultra-deep shafts of gold mines[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(8)：1 611–1 621.(in Chinese))
[6] 康红普，张晓，王东攀，等. 无煤柱开采围岩控制技术及应用[J]. 煤炭学报，2022，47(1)：16–44.(KANG Hongpu，ZHANG Xiao，WANG Dongpan，et al. Strata control technology and applications of non-pillar coal mining[J]. Journal of China Coal Society，2022，47(1)：16–44.(in Chinese))
[7] 程海勇，吴爱祥，吴顺川，等. 金属矿山固废充填研究现状与发展趋势[J]. 工程科学学报，2022，44(1)：11–25.(CHENG Haiyong，WU Aixiang，WU Shunchuan，et al. Research status and development trend of solid waste backfill in metal mines[J]. Chinese Journal of Engineering，2022，44(1)：11–25.(in Chinese))
[8] 杨胜利，孔德中，杨敬虎，等. 综放仰斜开采煤壁稳定性及注浆加固技术[J]. 采矿与安全工程学报，2015，32(5)：827–833.(YANG Shengli，KONG Dezhong，YANG Jinghu，et al. Coal wall stability and grouting reinforcement technique in fully mechanized caving face during topple mining[J]. Journal of Mining and Safety Engineering，2015，32(5)：827–833.(in Chinese))
[9] 李兴尚，许家林，朱卫兵，等. 条带开采垮落区注浆充填技术的理论研究[J]. 煤炭学报，2008，33(11)：1 205–1 210.(LI Xingshang，XU Jialin，ZHU Weibing，et al. Theoretical study on the backfill grouting in caving area with strip mining[J]. Journal of China Coal Society，2008，33(11)：1 205–1 210.(in Chinese))
[10] 纪洪广，权道路，苏晓波，等. 注浆对深部井巷交错区支护结构稳定性影响研究[J]. 采矿与安全工程学报，2021，38(5)：929–936.(JI Hongguang，QUAN Daolu，SU Xiaobo，et al. Influence of grouting on stability of supporting structure in deep roadway intersection area[J]. Journal of Mining and Safety Engineering，2021，38(5)：929–936.(in Chinese))
[11] 卢海峰，朱晨东，刘泉声. 不同注浆材料作用下结构面剪切力学特性研究[J]. 岩石力学与工程学报，2021，40(9)：1 803–1 811.(LU Haifeng，ZHU Chendong，LIU Quansheng. Study on shear mechanical properties of structural planes grouted with different materials[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(9)：1 803–1 811.(in Chinese))
[12] 赵军，方越，闫思泉，等. 不同水灰比注浆锯齿结构面剪切力学特性试验研究[J]. 岩石力学与工程学报，2021，40(增1)：2 673–2 680.(ZHAO Jun，FANG Yue，YAN Siquan，et al. Study on shear mechanical properties of sawtooth structure with different water cement ratios grouting[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(Supp.1)：2 673–2 680.(in Chinese))
[13] 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)：1 560–1 571.(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)：1 560–1 571.(in Chinese))
[14] 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制[J]. 煤炭学报，2022，47(11)：4 083–4 093.(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)：4 083–4 093.(in Chinese))
[15] 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 and Safety Engineering，2022，39(1)：174–183.(in Chinese))
[16] 马明杰，杨新安，周建，等. 非达西渗流作用下饱和黏土压密注浆扩孔理论分析[J]. 哈尔滨工业大学学报，2022，54(3)：32–40. (MA Mingjie，YANG Xinan，ZHOU Jian，et al. Theoretical analysis of cavity expansion for compaction grouting in saturated clay under non-Darcy seepage[J]. Journal of Harbin Institute of Technology，2022，54(3)：32–40.(in Chinese))
[17] 张亮，许家林，轩大洋，等. 覆岩隔离注浆充填浆体压缩特性实验与应用[J]. 煤炭学报，2017，42(5)：1 117–1 122.(ZHANG Liang，XU Jialin，XUAN Dayang，et al. Experimental and applied research on compression properties of slurry used for isolated overburden grout injection[J]. Journal of China Coal Society，2017，42(5)：1 117–    1 122.(in Chinese))
[18] 李博，王晔，邹良超，等. 岩石裂隙内浆液–水两相流可视化试验与驱替规律研究[J]. 岩土工程学报，2022，44(9)：1 608–1 616. (LI Bo，WANG Ye，ZOU Liangchao，et al. Investigation on displacement law of grout-water two-phase flow in a rough-walled rock fracture through visualization test[J]. Chinese Journal of Geotechnical Engineering，2022，44(9)：1 608–1 616.(in Chinese))
[19] 王春，王怀彬，熊祖强，等. 承压注浆加固含弱面岩体时的岩–浆抗剪强度耦合机制[J]. 中国有色金属学报，2020，30(11)：2 758–    2 772.(WANG Chun，WANG Huaibin，XIONG Zuqiang，et al. Coupling mechanism of rock–magma shear strength in the reinforcement of rock masses with weak faces by grouting under pressure[J]. The Chinese Journal of Nonferrous Metals，2020，30(11)：2 758–2 772.(in Chinese))
[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)：2 451–2 459. (WANG Zhi，QIN Wenjing，ZHANG Lijuan. Coupling mechanism of rock-pulp shear strength in process of confined grouting reinforcement for weak-faced rock mass[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(12)：2 451–2 459.(in Chinese))
[21] 王海龙，戎密仁，戎虎仁，等. 应变速率对注浆体力学特性影响规律[J]. 哈尔滨工业大学学报，2020，52(9)：176–184.(WANG Hailong，RONG Miren，RONG Huren，et al. Influence of strain rate on mechanical properties of grouting body[J]. Journal of Harbin Institute of Technology，2020，52(9)：176–184.(in Chinese))
[22] 王琦，王雷，刘博宏，等. 破碎围岩注浆体空隙特征和力学性能研究[J]. 中国矿业大学学报，2019，48(6)：1 197–1 205.(WANG Qi，WANG Lei，LIU Bohong，et al. Study of void characteristics and mechanical properties of fractured surrounding rock grout[J]. Journal of China University of Mining and Technology，2019，48(6)：1 197–   1 205.(in Chinese))
[23] 陆银龙，贺梦奇，李文帅，等. 岩石结构面注浆加固微观力学机制与浆–岩黏结界面结构优化[J]. 岩石力学与工程学报，2020，39(9)：1 808–1 818.(LU Yinlong，HE Mengqi，LI Wenshuai，et al. Micromechanical mechanisms of grouting reinforcement in rock joints and microstructure optimization of grout–rock bonding interfaces[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(9)：1 808–1 818.(in Chinese))
[24] 张嘉凡，徐荣平，刘洋，等. 冻融循环作用下注浆裂隙岩体微观孔隙演化规律及剪切力学行为研究[J]. 岩石力学与工程学报，2022，41(4)：676–690.(ZHANG Jiafan，XU Rongping，LIU Yang，et al. Study on micro-pore evolution law and shear mechanical behavior of grouting fractured rock mass under freeze-thaw cycle[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(4)：676–690.(in Chinese))
[25] 朱磊，宋天奇，古文哲，等. 矸石浆体输送阻力特性及采空区流动规律试验研究[J]. 煤炭学报，2022，47(增1)：39–48.(ZHU Lei，SONG Tianqi，GU Wenzhe，et al. Experimental research on transport- resistance characteristics of gangue slurry and its flow trend in the goaf[J]. Journal of China Coal Society，2022，47(Supp.1)：39–48.(in Chinese))
[26] 王忠昶，张文泉，赵德深. 离层注浆条件下覆岩变形破坏特征的连续探测[J]. 岩土工程学报，2008，27(7)：1 094–1 098.(WANG Zhongchang，ZHANG Wenquan，ZHAO Deshen. Continuous exploration for deformation and failure of overburdens under injecting grouts in separate layers[J]. Chinese Journal of Geotechnical Engineering，2008，27(7)：1 094–1 098.(in Chinese))
[27] 高延法，牛学良，廖俊展. 矿山覆岩离层注浆时的注浆压力分析[J]. 岩石力学与工程学报，2004，(增2)：5 244–5 247.(GAO Yanfa，NIU Xueliang，LIAO Junzhan. Analysis on grouting pressure when grouting in overburden bed–separations in mine[J]. Chinese Journal of Rock Mechanics and Engineering，2004，(Supp.2)：5 244–5 247.(in Chinese))
[28] 刘旭，陈歆，李立辉，等. 负压成型水泥基材料孔结构特征[J]. 哈尔滨工业大学学报，2021，53(9)：26–33.(LIU Xu，CHEN Xin，LI Lihui，et al. Characterization of pore structure of cement–based materials produced in negative pressure[J]. Journal of Harbin Institute of Technology，2021，53(9)：26–33.(in Chinese))
[29] 李晓光，王攀奇，张郁，等. 再生骨料混凝土毛细管负压和界面过渡区研究[J]. 建筑材料学报，2022，25(6)：572–576.(LI Xiaoguang，WANG Panqi，ZHANG Yu，et al. Study on capillary negative pressure and interfacial transition zone of regenerated aggregates concrete[J]. Journal of Building Materials，2022，25(6)：572–576.(in Chinese))
[30] 樊玉萍，董宪姝. 粒度组成特性对煤泥脱水效果影响的研究[J]. 中国煤炭，2015，41(3)：95–100.(FAN Yuping，DONG Xianshu. Study on dehydration effect of fine coal slurry based on particle characteristics[J]. China Coal，2015，41(3)：95–100.(in Chinese))
[31] 袁承斌，陈兴，陈小鹏，等. 粉煤灰掺量对真空脱水混凝土碳化速度的影响[J]. 水利水电科技进展，2009，29(3)：17–19.(YUAN Chengbin，CHEN Xing，CHEN Xiaopeng，et al. Effect of fly ash content on the carbonation velocity of concrete by vacuum dewatering treatment[J]. Advances in Science and Technology of Water Resources，2009，29(3)：17–19.(in Chinese))
[32] 欧阳幼玲，傅勇明，钱文勋，等. 真空脱水工艺下的混凝土性能[J]. 水利水运工程学报，2022，(3)：66–73.(OUYANG Youling，FU Yongming，QIAN Wenxun，et al. Performance of concrete with vacuum dehydration process[J]. Hydro-Science and Engineering，2022，(3)：66–73.(in Chinese))
[33] 浩婷，王曦，周颜，等. 真空负载方式对疏浚淤泥脱水过程中脱水规律的影响[J]. 岩土力学，2015，36(11)：3 187–3 192.(HAO Ting，WANG Xi，ZHOU Yan，et al. Effect of vacuum loading method on dehydration of dredged sludge in its dewatering process[J]. Rock and Soil Mechanics，2015，36(11)：3 187–3 192.(in Chinese))
[34] 朱庚杰，朱万成，侯晨，等. 絮凝剂在金矿尾砂真空过滤脱水中的应用研究[J]. 金属矿山，2021，(4)：45–52.(ZHU Gengjie，ZHU Wancheng，HOU Chen，et al. Application of flocculant in vacuum filtration and dehydration of gold mine tailings[J]. Metal Mine，2021，(4)：45–52.(in Chinese))
[35] 胡松，高明军，刘志浩，等. 真空预压联合注浆法处理软土地基试验研究[J]. 水电能源科学，2016，34(2)：133–135.(HU Song，GAO Mingjun，LIU Zhihao，et al. Experimental study of soft foundation treatment under vacuum preloading-grouting condition[J]. Water Resources and Power，2016，34(2)：133–135.(in Chinese))
[36] 吴跃东，石晓燕，刘坚，等. 真空预压加固区硬壳层的水分运移解析解[J]. 岩土力学，2013，34(增2)：110–114.(WU Yuedong，SHI Xiaoyan，LIU Jian，et al. Analytical solution of moisture migration in crust layer of vacuum preloading zone[J]. Rock and Soil Mechanics，2013，34(Supp.2)：110–114.(in Chinese))
[37] 崔溦，王利新，江志安，等. 基于修正立方定律的岩体粗糙裂隙网络注浆过程模拟研究[J]. 岩土力学，2021，42(8)：2 250–2 258. (CUI Wei，WANG Lixin，JIANG Zhian，et al. Numerical simulation of grouting process in rock mass with rough fracture network based on corrected cubic law[J]. Rock and Soil Mechanics，2021，42(8)：      2 250–2 258.(in Chinese))
[38] 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.(in Chinese))
[39] 梁彦波. 长壁开采老采空区注浆加固减缓覆岩体残余沉降研究[硕士学位论文][D]. 青岛：山东科技大学，2020.(LIANG Yanbo. Study on reducing residual settlement of overburden by grouting reinforcement in old goaf of longwall mining[M. S. Thesis][D]. Qingdao：Shandong University of Science and Technology，2020.(in Chinese))
[40] 谢和平. 岩土介质的分形孔隙和分形粒子[J]. 力学进展，1993，23(2)：145–164.(XIE Heping. Fractal pores and fractal particles of rock and soil materials[J]. Advances in Mechanics，1993，23(2)：145–164.(in Chinese))
[41] KATZ T. Fractal sandstone pores: Implications for conductivity and pore formation[J]. Physical Review Letters，1985，54(12)：1 325–   1 328.
[42] 秦楠，叶飞，韩兴博，等. 基于分形理论的盾构壁后注浆压滤扩散模型[J]. 中南大学学报：自然科学版，2021，52(12)：4 484–     4 491.(QIN Nan，YE Fei，HAN Xingbo，et al. Pressure filtration diffusion model of shield tunnel back-filled grouting based on fractal theory[J]. Journal of Central South University：Science and Technology，2021，52(12)：4 484–4 491.(in Chinese))