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Super-absorbent swellable polymer as grouting material for treatment of karst water inrush

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International Journal of Mining Science and Technology 2021年第5期31卷 753-763页

作者： Shucai Li Chenyang Ma Rentai Liu Mengjun Chen Jia Yan Zhenjun Wang Shaolong Duan Huasheng Zhang School of Civil Engineering Shandong UniversityJinan 250061China Geotechnical and Structural Engineering Research Centre Shandong UniversityJinan 250061China School of Qilu Transportation Shandong UniversityJinan 250002 China

Grouting is the most commonly used method to control water inrush in underground *** cement-based materials are easy to dilute and hard to coagulate under the influence of large flow and high-velocity water *** address these deficiencies,a new type of polymer grouting material with an excellent expansion ratio was *** material quickly absorbs water and has an expansion ratio of 1:*** material is composed of a superabsorbent polymer(SAP),glycerol,and *** effects of water quality on the expansion ratio and expansion rate of the material were examined,and the best solid–liquid ratio for the slurry was determined by fluidity measurements.A karst specially designed pipeline water inrush test device showed that 800 g of SAP can achieve 0.6 m/s water flow blockage in the smooth pipeline,demonstrating that the ability of the SAP slurry to block water inrush is superior to those of other *** study provides a reference for water inrush plugging,and has important implications for the reduction and control of karst pipeline-type water inrush disasters,ensuring the safety of construction sites and preventing loss of life and damage to property.

关键词： Karst water inrush Model test Grouting material Superabsorbent polymer

An early warning method for water inrush in Dongjiahe coal mine based on microseismic moment tensor

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Journal of Central South University 2020年第10期27卷 3133-3148页

作者： MA Ke SUN Xing-ye TANG Chun-an WANG Su-jian YUAN Fu-zhen PENG Yi-lin LIU Kai State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China Institute of Rock Instability and Seismicity Research Dalian University of TechnologyDalian 116024China Shannxi Coal and Chemical Technology Institute Company Limited Xi’an 710065China China Petroleum Pipeline Engineering Corporation Langfang 065000China School of Environmental Science University of LiverpoolLiverpool L693BXUnited Kingdom Department of Engineering Science University of OxfordParks RoadOX13PJUnited Kingdom

Dongjiahe Coal Mine belongs to the Carboniferous Permian coal field which has a high degree of karst and fissure *** paper takes the working face of Dongjiahe Coal Mine as an example;through the microseismic(MS)monitoring system arranged on the working face,the moment tensor theory was used to invert the focal mechanism solution of the anomalous area of the floor MS event;combining the numerical simulation and field data,the underlying floor faults were identified by the stress inversion *** results show that:1)Moment tensors were decomposed into three components and the main type of rupture in this area is mixed failure according to the relative criterion;2)The hidden fault belongs to the reversed fault,its dip angle is approximately 70°,and the rupture length is 21 m determined by the inversion method of the initial dynamic polarity and stress in the focal mechanism;3)The failure process of the fault is divided into three stages by numerical simulation method combined with the temporal and spatial distribution of MS *** results can provide a reference for early warning and evaluation of similar coal mine water inrush risks.

关键词： moment tensor inversion water inrush fault recognition realistic failure process analysis

A state‑of‑the‑art review on rock seepage mechanism of water inrush disaster in coal mines

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International Journal of Coal Science & Technology 2022年第4期9卷 1-28页

作者： Dan Ma Hongyu Duan Jixiong Zhang Haibo Bai School of Mines China University of Mining and TechnologyXuzhou 221116JiangsuChina State Key Laboratory of Coal Resources and Safe Mining China University of Mining and TechnologyXuzhou 221116JiangsuChina MOE Key Laboratory of Deep Coal Resource Mining China University of Mining and TechnologyXuzhou 221116JiangsuChina Department of Sustainable Development Environmental Science and EngineeringRoyal Institute of Technology10044 StockholmSweden State Key Laboratory of Geomechanics and Deep Underground Engineering China University of Mining and TechnologyXuzhou 221116JiangsuChina

water inrush is one of the most dangerous disasters in coal *** to the large-scale mining and complicated hydrogeological conditions,thousands of deaths and huge economic losses have been caused by water inrush disasters in *** are two main factors determining the occurrence of water inrush:water source and water-conducting *** on the formation mechanism of the water-conducting pathway is the main direction to prevent and control the water inrush,and the seepage mechanism of rock mass during the formation of the water-conducting pathway is the key for the research on the water inrush *** paper provides a state-of-the-art review of seepage mechanisms during water inrush from three aspects,i.e.,mechanisms of stress-seepage coupling,fow regime transformation and rock *** numerical methods and experimental analysis,the evolution law of stress and seepage felds in the process of water inrush is fully studied;the fuid movement characteristics under diferent fow regimes are clearly summarized;the law of particle initiation and migration in the process of water inrush is explored,and the efect of rock erosion on hydraulic and mechanical properties of the rock media is also ***,some limitations of current research are analyzed,and the suggestions for future research on water inrush are proposed in this review.

关键词： Rock seepage mechanism water inrush Coal mine Stress-seepage coupling Flow regime transformation Rock erosion

Analysis of the Mechanism of water inrush Geohazards in Deep-Buried Tunnels under the Complex Geological Environment of Karst Cave-Fractured Zone

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Journal of Earth Science 2022年第5期33卷 1204-1218页

作者： Weishe Zhang Yuyong Jiao Guohua Zhang Xi Zhang Guangzhao Ou Zhiping Lin Faculty of Engineering China University of GeosciencesWuhan430074China Fujian Highway Bridge Engineering Co. Ltd.Fuzhou350000China

To study the mechanism and evolution process of water inrush geohazards under the complex geological environment of the karst cave-fractured zone,a large-scale physical threedimensional(3 D)model test was first *** the conceptual model for the evolution process of water inrush geohazards and the simplified theoretical model for the critical hydraulic pressure were both established based on the main characteristics of the water inrush geohazard in the engineering background and that in the model test.A new method was developed for modeling the geological environment of the karst cave-structural plane,and two formulae describing the critical water pressure of water inrush geohazards under two failure models of tensile-shear fracture failure and compressionshear fracture failure were also deduced based on fracture *** results showed that:(1)the evolution process of the water inrush geohazard can be divided into four stages,which include the initial balance,the propagation of original cracks,the formation of the dominant water inrush channel,and the instability of the waterproof rock mass;(2)the suddenness of water inrush geohazards becomes stronger with the increase of the hydraulic pressure;(3)the calculated critical hydraulic pressure of water inrush geohazards is similar to the measured critical hydraulic pressure in the model test,which validated the accuracies of the theoretical model,and the failure model of water inrush geohazards in this research is compression-shear fracture failure.

关键词： karst cave fractured zone water inrush mechanism critical hydraulic pressure model test engineering geology

Analysis on probability of water inrush and quicksand in different mining sequences under an unconsolidated alluvium aquifer by fluid-solid coupling theory

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Journal of Coal Science & Engineering(China) 2012年第1期18卷 60-66页

作者： Lu-wang Chen Yuan Qin He-rong Gui Shi-lei Zhang School of Resources and Environmental engineering Hefei University of Technology Hefei China Haikou City Urban Planning & Design Institute Haikou China School of Earth Sciences and Engineering Suzhou University Suzhou China

To study the behavior of overlying strata and the likelihood of water inrush and quicksand with different mining sequences under an unconsolidated alluvium aquifer, a numerical model based on the fluid-solid coupling theory was con- structed by FLAC3D. Simulation results revealed that the mining sequences had a significant influence on the seepage, dis- placement and failure characteristics of the overlying strata. In this kind of geological and hydrogeological conditions, the workface close to the outcrop of coal seam easily suffers from water inrush and quicksand during mining. In the simulation re- sults, the plastic zone, vertical displacement and pore water pressure in the overlying strata of the workface decrease more or less using the upward mining sequence than using the downward mining sequence. Therefore, the application of the upward mining sequence in the process of mining is preferential to prevent water inrush and quicksand.

关键词： water inrush quicksand mining sequences solid-fluid coupling

Effect of artesian water on the mine floor water inrush and significance of similitude simulation to it

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Journal of Coal Science & Engineering(China) 2007年第4期13卷 476-479页

作者：张文泉任仰辉张红日朱志强 Key Laboratory of Mine Disaster Prevention and Control Shandong University of Science and Technology Qingdao 266510 China The Mine Disaster Prevention and Control Lab. of Ministry of Education Qingdao 266510 China

According to the in situ statistics data, indoor rock hydraulic fracturing experiments and numerical simulation results, the role of artesian water quantity was analyzed, emphasis was put on the analysis of the damage mechanics of artesian water to rocks under the floor and the softening, solution and scouring action of artesian water were also researched. At the end of the paper, practical significance of similar material simulation to the influence of artesian water on water inrush under the floor was discussed and hoped to provide references to the artesian water hydraulics simulation experiment devices design and test based on the indoor similar material simulation platform.

关键词： artesian water mine floor water inrush similitude simulation

Xinhe Mine water inrush risk assessment based on quantification theoretical models

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Journal of Coal Science & Engineering(China) 2010年第4期16卷 386-388页

作者： LI Hui JING Guo-xun CAI Zheng-Iong OU Jian-chun School of Safety Science and Engineering Henan Polytechnic University Jiaozuo 454000 China Coal Chemical Industry Group Co. Ltd. Henan Jiaozuo Subsidiary Company Jiaozuo 454000 China School of Safety Science and Engineering China University of Mining and Technology Xuzhou 261116 China

Taking the Xinhe mine's structure, mine pressure, structural fissure, fault andfault displacement, the distance between fault and water inrush point, thickness of block,water pressure those geological factors which influenced the water inrush as the independentvariable, based on these data of water inrush point and water uninrush point, usingthe method of quantification theory(Ⅰ,Ⅱ), it would quantitatively disposes the qualitativevariable, applied to calculation to evaluate the risk of Xinhe's water inrush.

关键词： water inrush assessment prediction quantification theoretical model

MECHANISM ON PROGRESSIVE INTRUSION OF PRESSURE water UNDER COAL SEAMS INTO PROTECTIVE AQUICLUDE AND ITS APPLICATION IN PREDICTION OF water inrush

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Journal of Coal Science & Engineering(China) 1996年第2期2卷 9-15页

作者：王经明葛家德吴玉华邓西清贺兆礼 XI＇Branch CeatralCoalMining.Researchinstitute710054 WanbelCoilMining.Barean235000 XI＇Branch CeatralCoalMining.Researchinstitute710054

This article proposes a water inrush mechanism of progressive intrusion of pressure water up into the coal floor aquiclude according to injection tests and observations. A numerical model and a criterion of water inru... 详细信息

关键词： pressure water aquiclude water inrush prediction

Study on Mechanism of water inrush of Karst Tunnels

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Chinese Railways 2023年第2期 20-28页

作者： WANG Qingsong ZHAI Jinying(Translated) R&D Center of Construction Technology and Equipment for Tunnels on High Plateau China Railway Construction Corporation Limited China Railway 20th Bureau Group Co. Ltd. 不详

water inrush,which is one of the challenging issues and hot topics in the tunneling industry,is very easy to occur during the construction of karst *** mechanism of water inrush of karst tunnels is discussed and analyzed in the paper:the water inrush of karst tunnels is generally divided into three steps,i.e.,the forming of the hazard source,the forming of the water inrush passage and the failure of the anti-inrush rock *** failure of the anti-inrush rock mass of karst tunnels are classified into 5 types,i.e.,the integral tensile-shear failure,the hydraulic fracturing,the infiltration induced sliding of the filling medium,the loss of key blocks and the comprehensive water inrush *** failure mechanism is studied on basis of typical cases and by means of numerical simulation or theoretical *** is drawn that most of the water inrushes in actual tunneling are comprehensive water inrushes,which are the comprehensive results of the interrelation and interaction of various water inrush types,and that different types of water inrushes have related continuity and progressive evolution relationships under certain conditions.

关键词： karst tunnel water inrush mechanism numerical simulation failure mechanism