Numerical simulations of the rapid interception mechanisms by the borehole-controlled grouting with grout-conserving bags under flowing water

Authors

YANG Zhibin, CCTEG Xi’an Research Institute (Group) Co., Ltd., Xi’an 710077, China; Shaanxi Key Lab of Mine Water Hazard Prevention and Control, Xi’an 710077, ChinaFollow

Abstract

Grout-conserving bags. To characterize the local and overall development processes of the rapid interception more subtly and vividly, this study built a CFD-DEM fluid-solid coupling mathematical model of the roadway inlet under the given water head boundary according to the principle of a constant velocity. Then, given constant velocities of water inrush volumes of 2000 m³/h and 20000 m³/h, this study numerically simulated the construction process of water-blocking bodies by pouring and stacking aggregates with a grain size of 22 mm under the operating conditions with or without grout-conserving bags. The results show that: (1) Under both operating conditions, aggregates can accumulate to the roadway roof in the case of the low flow velocity but can accumulate only to 3/4 of the roadway height in the case of the high flow velocity. The main differences were that when grout-conserving bags were applied, water-blocking bodies were constructed to the same height in a shorter time while exhibiting higher blocking and lower water permeability; (2) In the case of the high flow velocity, aggregates still cannot accumulate to the roadway roof locally by simply increasing the grain size of aggregates but can swiftly accumulate to the roadway roof locally by simply increasing the pouring speed of aggregates; (3) As shown by the analytical results of the reasons for the differences mentioned above, there are two mechanisms of the rapid interception under flowing water by the borehole-controlled grouting with grout-conserving bags. One is that the bags themselves quickly formed part of the water-blocking body space. In other words, aggregates were put at the roadway bottom and filled in the roadway locally in advance. The other mechanism is that the high resistance and low permeability of the water-blocking bodies can reduce the reconstruction number of water-blocking bodies after being broken through in the later water-blocking stage as a result of the rapid pressure rise in the water-blocking section. Furthermore, these water-blocking performances of water-blocking bodies are conducive to the rapid coagulation of grout in the supplementary grouting stage.

Keywords

grout-conserving bags, CFD-DEM fluid-solid coupling, rapid interception of flowing water, aggregate pouring, water-flowing roadway

DOI

10.12363/issn.1001-1986.23.01.0001

Recommended Citation

Y. (2023) "Numerical simulations of the rapid interception mechanisms by the borehole-controlled grouting with grout-conserving bags under flowing water," Coal Geology & Exploration: Vol. 51: Iss. 6, Article 13.
DOI: 10.12363/issn.1001-1986.23.01.0001
Available at: https://cge.researchcommons.org/journal/vol51/iss6/13

Reference

[1] 杨志斌. 煤层底板突水灾害动水快速截流机理及预注浆效果定量评价[D]. 北京：煤炭科学研究总院，2021.

YANG Zhibin. Mechanism of the rapid interception of the flowing water and the quantitative evaluation of the pre–grouting effect of water inrush disaster in coal seam floor[D]. Beijing：China Coal Research Institute，2021.

[2] 杨志斌,董书宁. 动水大通道突水灾害治理关键技术[J]. 煤炭科学技术,2018,46(4):110−116.

YANG Zhibin,DONG Shuning. Key technology of water inrush disaster control under hydrodynamic large channel condition[J]. Coal Science and Technology,2018,46(4):110−116.

[3] 董书宁,杨志斌,朱明诚,等. 过水巷道动水快速截流大型模拟实验系统研制[J]. 煤炭学报,2020,45(9):3226−3235.

DONG Shuning,YANG Zhibin,ZHU Mingcheng,et al. Development of large–scale simulation experiment system for dynamic water rapid sealing in flowing water roadway[J]. Journal of China Coal Society,2020,45(9):3226−3235.

[4] 杨志斌,董书宁. 过水巷道动水快速截流机理研究[J]. 采矿与安全工程学报,2021,38(6):1134−1143.

YANG Zhibin,DONG Shuning. Mechanism of rapid interception of flowing water in water–flowing roadways[J]. Journal of Mining & Safety Engineering,2021,38(6):1134−1143.

[5] 何思源. 开滦范各庄矿岩溶陷落柱特大突水灾害的治理[J]. 煤田地质与勘探,1986,14(2):35−42.

HE Siyuan. Management of catastrophic water inrush disasters in karst collapse columns of Fangezhuang Mine in Kailuan[J]. Coal Geology & Exploration,1986,14(2):35−42.

[6] 李彩惠. 矿井特大突水巷道截流封堵技术[J]. 西安科技大学学报,2010,30(3):305−308.

LI Caihui. Interception–plugging technology for supergiant water inrush laneway in mine[J]. Journal of Xi’an University of Science and Technology,2010,30(3):305−308.

[7] WANG Wei,HU Baoyu. A new technology of rapid sealing roadway in Luotuoshan Coal Mine[J]. Procedia Earth & Planetary Science,2011,3:429−434.

[8] 朱明诚. 动水大通道突水钻孔控制注浆高效封堵关键技术及装备[J]. 煤田地质与勘探,2015,43(4):55−58.

ZHU Mingcheng. Key technology and equipment of borehole–controlled grouting for highly effective plugging large channel of water inrush[J]. Coal Geology & Exploration,2015,43(4):55−58.

[9] 朱明诚. 钻孔控制注浆技术在过水大通道封堵中的应用[J]. 中国煤炭地质,2015,27(5):46−49.

ZHU Mingcheng. Application of controlled borehole grouting technology in large water channel plugging[J]. Coal Geology of China,2015,27(5):46−49.

[10] 王威. 动水条件下堵巷截流技术与阻水段阻水能力研究[D]. 北京：煤炭科学研究总院，2012.

WANG Wei. A study on techniques of roadway–blocking & flow−cutting off under hydrodynamic conditions and capability evaluation of water−blocking segment[D]. Beijing：China Coal Research Institute，2012.

[11] 郭启文. 煤矿重大水害快速治理技术：注浆堵水的实践与认识[M]. 北京：煤炭工业出版社，2005.

[12] MOU Lin,DONG Shuning,ZHOU Wanfang,et al. Data analysis and key parameters of typical water hazard control engineering in coal mines of China[J]. Mine Water and the Environment,2020,39:331−344.

[13] 牟林,董书宁. 截流巷道骨料堆积体中浆液运移规律与阻水机制[J]. 地下空间与工程学报,2020,16(6):1891−1900.

MOU Lin,DONG Shuning. Migration rule and water blocking mechanism of cement slurry in aggregate accumulation of underground tunnel closure[J]. Chinese Journal of Underground Space and Engineering,2020,16(6):1891−1900.

[14] 董书宁,牟林. 突水淹没矿井动水巷道截流阻水墙建造技术研究[J]. 煤炭科学技术,2021,49(1):294−303.

DONG Shuning,MOU Lin. Study on construction technology of water blocking wall in hydrodynamic pathway of submerged mine due to water inrush[J]. Coal Science and Technology,2021,49(1):294−303.

[15] 李维欣. 圆型过水巷道骨料灌注模拟试验[D]. 徐州：中国矿业大学，2016.

LI Weixin. An experimental simulation on aggregate filling into horizontal circular tunnel with flowing water[D]. Xuzhou：China University of Mining and Technology，2016.

[16] 惠爽. 矿井淹没巷道多孔灌注骨料封堵模拟试验[D]. 徐州：中国矿业大学，2018.

HUI Shuang. An experimental investigation on pouring aggregate to plug an inundated mine tunnel through boreholes[D]. Xuzhou：China University of Mining and Technology，2018.

[17] 牟林. 动水条件巷道截流阻水墙建造机制与关键技术研究[D]. 北京：煤炭科学研究总院，2021.

MOU Lin. Study on construction mechanism and key technology of water−blocking wall in hydrodynamic pathway[D]. Beijing：China Coal Research Institute，2021.

[18] 徐博会,丁述理,白峰青. 煤矿特大突水事故注浆堵水过程的数值模拟[J]. 煤炭学报,2010,35(10):1665−1669.

XU Bohui,DING Shuli,BAI Fengqing. Numerical simulation of grouting for stopping up water in water inrush accident of coal mine[J]. Journal of China Coal Society,2010,35(10):1665−1669.

[19] 牟林,董书宁,郑士田,等. 基于CFD–DEM耦合模型的阻水墙建造过程数值模拟[J]. 岩土工程学报,2021,43(3):481−491.

MOU Lin,DONG Shuning,ZHENG Shitian,et al. Numerical simulation of construction of water−blocking wall based on CFD–DEM coupling method[J]. Chinese Journal of Geotechnical Engineering,2021,43(3):481−491.

[20] 牟林. 过水巷道中骨料起动力学机制及两相流耦合模拟[J]. 煤田地质与勘探,2020,48(6):161−169.

MOU Lin. Mechanism of aggregate start–up process and coupling of two–phase flow in hydrodynamic roadway[J]. Coal Geology & Exploration,2020,48(6):161−169.

[21] 牟林. 过水大断面截流堵巷工程若干关键技术问题的探讨[J]. 煤炭学报,2021,46(11):3525−3535.

MOU Lin. Discussion on key technical problems of water cutting–off engineering in submerged roadway with large–cross section[J]. Journal of China Coal Society,2021,46(11):3525−3535.

[22] EI SHAMY U,ZEGHAL M. Coupled continuum–discrete model for saturated granular soils[J]. Journal of Engineering Mechanics,2005,131(4):413−426.

[23] 蒋明镜,张望城. 一种考虑流体状态方程的土体CFD–DEM耦合数值方法[J]. 岩土工程学报,2014,36(5):793−801.

JIANG Mingjing,ZHANG Wangcheng. Coupled CFD–DEM method for soils incorporating equation of state for liquid[J]. Chinese Journal of Geotechnical Engineering,2014,36(5):793−801.

[24] 丁冬峰,程可,陆晓峰,等. 基于DEM模拟液固流化床粒度级配对颗粒流动特性的影响[J]. 中国粉体技术,2018,24(2):18−25.

DING Dongfeng,CHENG Ke,LU Xiaofeng,et al. Influence of particle size distribution in liquid–solid fluidized bed on particle flow characteristics based on DEM[J]. China Powder Science and Technology,2018,24(2):18−25.

[25] 苏东升. 基于CFD–DEM耦合模拟方法的水流泥沙运动研究[D]. 天津：天津大学，2015.

SU Dongsheng. Investigation of fluid–sediment particle motion based on CFD–DEM coupling simulation method[D]. Tianjin：Tianjin University，2015.

[26] 景路,郭颂怡,赵涛. 基于流体动力学–离散单元耦合算法的海底滑坡动力学分析[J]. 岩土力学,2019,40(1):388−394.

JING Lu,GUO Songyi,ZHAO Tao. Understanding dynamics of submarine landslide with coupled CFD–DEM[J]. Rock and Soil Mechanics,2019,40(1):388−394.

[27] 刘卡,高辰龙,周玉. 基于CFD–DEM方法的水下抛石运动模拟研究[J]. 中国水运:航道科技,2016,6:1−9.

LIU Ka,GAO Chenlong,ZHOU Yu. Simulation of underwater riprap motion based on CFD−DEM method[J]. China Water Transportation:Science & Technology for Waterway,2016,6:1−9.

[28] 邵兵,闫怡飞,毕朝峰,等. 基于CFD–DEM耦合模型的大粒径非常规岩屑颗粒运移规律研究[J]. 科学技术与工程,2017,17(27):190−195.

SHAO Bing,YAN Yifei,BI Chaofeng,et al. Migration of irregular cuttings particles in big size by CFD–DEM coupled simulation model[J]. Science Technology and Engineering,2017,17(27):190−195.

[29] ZHOU Z Y,KUANG S B,CHU K W,et al. Discrete particle simulation of particle–fluid flow:Model formulations and their applicability[J]. Journal of Fluid Mechanics,2010,661:482−510.

[30] ZHANG H P,MAKSE H A. Jamming transition in emulsions and granular materials[J]. Physical Review E,Statistical,Nonlinear,and Soft Matter Physics,2005,72(1):011301.

[31] AI Jun,CHEN Jianfei,ROTTER J M,et al. Assessment of rolling resistance models in discrete element simulations[J]. Powder Technology,2011,206(3):269−282.