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考虑浆液渗流–岩体变形耦合作用的裂隙注浆模拟试验系统研制与应用

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岩石力学与工程学报 2024年第4期43卷 878-889页

作者：翟明磊李振华杜锋白海波王文强河南理工大学能源科学与工程学院河南焦作454000 河南理工大学煤炭安全生产与清洁高效利用省部共建协同创新中心河南焦作454000 河南理工大学河南省矿井水害防控及水资源利用工程技术研究中心河南焦作454000 中国矿业大学深部岩土力学与地下工程国家重点实验室江苏徐州221116

为研究裂隙岩体注浆过程中的浆液渗流–岩体变形耦合作用,自主研制可视化变开度裂隙注浆模拟试验系统。该系统主要由浆液供给设备、注浆模拟设备和数据监测设备组成,具有良好密封性且实现了注浆压力作用下裂隙开度变化,可模拟不同开度... 详细信息

为研究裂隙岩体注浆过程中的浆液渗流–岩体变形耦合作用,自主研制可视化变开度裂隙注浆模拟试验系统。该系统主要由浆液供给设备、注浆模拟设备和数据监测设备组成,具有良好密封性且实现了注浆压力作用下裂隙开度变化,可模拟不同开度裂隙在注浆流量、浆液水灰比和侧向压力等多源因素影响下的浆液流动过程,并可用于气体渗流–岩体变形耦合作用机制研究。利用该试验系统开展浆液渗流–岩体变形耦合作用注浆模拟试验,结果表明:裂隙开度增加削弱了注浆压力对裂隙的扩张作用,使浆液在流动过程中的能量损耗减少;水灰比减小导致浆液渗流–岩体变形耦合作用显著增强;侧向压力增大导致浆液渗流–岩体变形耦合作用程度减弱。灰色关联分析法结果表明,影响浆液渗流–岩体变形耦合作用的因素敏感程度顺序为注浆流量>侧向压力>浆液水灰比>裂隙开度。该试验系统的研制可为研究裂隙含水层注浆引起岩体变形等流固耦合问题和工程应用提供新的试验手段。

关键词：岩石力学岩体裂隙浆液扩散岩体变形可视化模拟试验

Seepage characteristics of collapse column fillings

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International Journal of Mining Science and Technology 2016年第2期26卷 333-338页

作者： Zhang Boyang bai haibo Zhang Kai State Key Laboratory of Geomechanics and Deep Underground Engineering China University of Mining & Technology

With concealment and hysteresis,water-inrush from Karst collapse column has become an important security hazard of lower group coal mining in North *** on the MTS8 15.02 seepage test system,we analyzed the impact of consolidation pressure,initial moisture content and confining pressure on the permeability of fillings in order to study the seepage characteristics of collapse column *** results show that:(l)The permeability of collapse column fillings is of the order of 10^(-16)-10^(-15) magnitude and decreases with an increase in consolidation pressure and decrease in initial moisture content.(2) The essence of filling seepage law change is the change in porosity,and a power function relationship exists between the permeability ratio and porosity ratio.(3) With increasing confining pressure,the permeability of fillings ***,under low confining pressure(1.2-4 MPa),the change of confining pressure has no obvious influence on the permeability.

关键词： Collapse column Filings Porosity Consolidation Permeability Moisture content

Pore structure characteristics of the relative water-resisting layer on the top of the Ordovician in Longgu Coal Mine

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International Journal of Mining Science and Technology 2014年第5期24卷 657-661页

作者： Rong Huren bai haibo State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining & Technology

In order to study the permeability and water-resisting ability of the strata on the top of the Ordovician in Longgu Coal Mine, this paper tested the permeability and porosity of the strata, investigated the fracture and pore structure features of the strata, and identified the main channels which govern the permeability and water-resisting ability of the strata. The permeability of the upper, central and lower strata shows as 2.0504 × 10^-3-2.782762× 10^-3, 4.1092 × 10^-3 -7.3387 × 10^-3 and 2.0891 ×10^-3-3.2705 × 10-3 μm^2, respectively, and porosity of that is 0.6786-0.9197%, 0.3109-0.3951% and 0.9829-1.8655%, respectively. The results indicate that：（I） the main channels of the relative water-resisting layer are the pore throats with a diameter more than 6 μm; （2） the major proportion of pore throats in the vertical flow channel and the permeability first increases and then sharply decreases; （3） the fractures occurring from the top to 20 m in depth of the strata were filled and there occurred almost no fracture under the depth of 40 m; and （4） the ratio of turning point of the main flow channel in the strata on top of Ordovician can be used to confirm the thickness of filled water-resisting lavers.

关键词： Relative water-resisting layer Filling effect Main channels of seepage Pore structure

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

Numerical simulation on the risk of roof water inrush in Wuyang Coal Mine

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International Journal of Mining Science and Technology 2012年第2期22卷 273-277页

作者： Yao Banghua bai haibo Zhang Boyang State Key Laboratory of Geomechanics and Deep Underground Engineering China University of Mining&TechnologyXuzhou 221008China

Water-inrush in mine is one of the mine disasters caused by *** order to assess the risk of roof water-inrush in Wuyang Coal Mine based on the geological material of the coal mine,we built numerical models for the roof fracture and seepage development rule by using RFPA2D and COMSOL respectively,to analyze the changes in fracture zone,stress,water pressure and seepage vector with the advancement of working face,and compared the results with the field investigated *** numerical simulation results indicate that:(1) with the advancement of the working faces,the stress relief range and fracture zone in the overlying strata increased rapidly up to about 90 m,and then tended to remain constant,reaching a final height of about 95 m which agrees with the field investigation;(2) the seepage flow constantly increased with a larger flow volume both in the front and rear area,where the stress concentration are the most serious.

关键词： Fracture zoneNumerical simulationWater inrushWuyang coal mine

Water protection in the western semiarid coal mining regions of China: A case study

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International Journal of Mining Science and Technology 2012年第5期22卷 719-723页

作者： Huang Hanfu Wang Changshen bai haibo Wang Zihe State Key Laboratory of Geomechanics & Deep Underground Engineering China University of Mining & Technology Xuzhou 221008 China Sima Coal Mine Lu'an Mining Group Co. Ltd. Changzhi 047105 China School of Resource & Geosciences China University of Mining & Technology Xuzhou 221116 China

The coal industry in China has been moving from the semiarid eastern to the drier western regions since the beginning of this *** protection is of the utmost concern for coal mining in these ***'an,as one of the state coal mining bases in China,has been seeing increasingly heavier pressure for the protection of water *** article considers Lu'an as an example and describes the ways these concerns may be *** mine-water utilization rates have effectively reduced wasting of water and,consequently,have reduced water *** the top layers of the Ordavician as aquifuge barriers can prevent floor karst water inrush into the longwall face and can protect the regional Ordovician karst water resources at the same *** strength of the overlying Quaternary clay can protect against roof collapse and has successfully preserved the Quaternary porous water resource.

关键词： Water-protection Coal mining Mine water utilization rate Aquifuge barrier Arid region

Theoretical analysis on water-inrush mechanism of concealed collapse pillars in floor

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Mining Science and Technology 2011年第1期21卷 57-60页

作者： Tang Junhua bai haibo Yao Banghua WU YU State Key Laboratory of Geomechanics and Deep Underground Engineering China University of Mining ＆ Technology Xuzhou 221008 China School of Mechanics ＆ Civil Engineering. China University of Mining ＆ Technology. Xuzhou 221116. China

In order to study the water-inrush mechanism of concealed collapse pillars from the mechanical view, a mechanical model for water-inrush of collapse pillars has been established based on thick plate theory of elastic mechanics in this *** solving this model the deformation of water-resistant rock strata under the action of water pressure and the expression of critical water pressure for collapse pillar waterinrush have been obtained The research results indicate that：the boundary conditions and strength of water-resistant strata play important roles in influencing water-inrush of collapse *** critical water-inrush pressure is determined by both relative thickness and absolute thickness of water-resistant strata.

关键词： Collapse pillar Water-inrush Critical water pressure Thick plate theory

晚古生代煤田水文地质特征与防治水理论及技术

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中国矿业大学学报 2016年第1期45卷 1-10页

作者：白海波缪协兴中国矿业大学深部岩土力学与地下工程国家重点实验室江苏徐州221116

世界煤矿突水量前5位都发生在中国华北,其水源为石炭-二叠系煤系底板的奥陶系石灰岩岩溶水,突水造成的直接经济损失位列中国煤矿各类事故之首.为了探讨其原因,通过调研,比较了中国与国外晚古生代大煤田煤矿开采防治水的难易程度和防治... 详细信息

世界煤矿突水量前5位都发生在中国华北,其水源为石炭-二叠系煤系底板的奥陶系石灰岩岩溶水,突水造成的直接经济损失位列中国煤矿各类事故之首.为了探讨其原因,通过调研,比较了中国与国外晚古生代大煤田煤矿开采防治水的难易程度和防治水技术方法,结论主要包括:1)中国华北、华南及俄罗斯的莫斯科近郊煤田(石炭-二叠系)在世界晚古生代煤田中矿井水文地质条件最为复杂,均受岩溶水威胁,防治水难度大;其余大煤田煤矿开采主要受煤系裂隙水影响,防治水难度相对较小;2)中国煤矿水文地质条件复杂的主要原因是板内构造变形剧烈、构造地质条件复杂,煤层顶底板近距离内即有厚度大且强岩溶化的富含水层,断层、陷落柱和暗河等导水通道多且规模大,而世界其他大煤田和含煤区则处于地盾等构造稳定区域,埋藏封闭条件好、构造简单、断层稀少,煤层顶底板没有较富含水层或很厚的隔水层;3)国外煤矿防治水方法以疏干开采为主,对条件较复杂的区块采取弃采和暂不采的方式,中国以带压、限压、疏降等多种方法并用,对各种条件下的煤层均进行了开采;4)国外重点在疏降水与排水设备及其自动化控制技术上突出,中国以带压开采理论和隔水层加固、含水层改造技术见长.

关键词：水文地质防治水疏干开采带压开采

A Generation Method of Letter-Level Adversarial Samples

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Journal on Artificial Intelligence 2021年第2期3卷 45-53页

作者： Huixuan Xu Chunlai Du Yanhui Guo Zhijian Cui haibo bai School of Information Science and Technology North China University of TechnologyBeijing100144China Department of Computer Science University of Illinois SpringfieldSpringfieldUSA

In recent years,with the rapid development of natural language processing,the security issues related to it have attracted more and more *** perturbation is a common security *** can try to completely modify the input classification judgment of the target program without people’s attention by adding,deleting,or replacing several characters,which can reduce the effectiveness of the *** the current research has provided various methods of perturbation attacks on characters,the success rate of some methods is still not *** paper mainly studies the sample generation of optimal perturbation characters and proposes a characterlevel text adversarial sample generation *** goal is to use this method to achieve the best effect on character *** sentiment classification experiments,this model has a higher perturbation success rate on the IMDB dataset,which proves the effectiveness and rationality of this method for text perturbation and provides a reference for future research work.

关键词： Perturbation attack sentiment analysis adversarial examples