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Physical simulation test study on the stability of wading personnel in mine water inrush roadway

Meitan Xuebao/Journal of the China coal Society 2025年第1期50卷 13-22页

作者： Wu, Qiang Yao, Yi Du, Yuanze Li, Huiping Zhao, Yingwang Xu, Hua Liu, Shouqiang Wang, Xiao inner mongolia research institute China University of Mining and Technology-Beijing Ordos017001 China School of Energy Engineering Yulin University Yulin719000 China State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation Tianjin University Tianjin300350 China Information Engineering College Beijing Institute of Petrochemical Technology Beijing102617 China National Engineering research Center of coal mine Water Hazard Controlling China University of Mining & Technology-Beijing Beijing100083 China Key Laboratory of mine Water Control and Resources Utilization National Mine Safety Administration Beijing100083 China

It is an important research content of emergency evacuation and rescue work to evaluate the hazard of personnel under the influence of multiple factors in mine water disasters. At present, the hazard judgment of people involved in water disasters mainly depends on experience, with certain blindness, but there are few reports on experimental research. Given this, a physical simulation test model for the stability of wading personnel in mine water inrush roadway was constructed, and mechanical monitoring of the cylinder model, standing stability of wading personnel, and wading speed testing were carried out under various flow conditions on different roadway gradients. Through the analysis of test data, the law of personnel wading stability and safety speed during the emergency escape of mine water disaster is extracted to reveal the potential relationship between personnel wading escape in mine roadway and roadway slope, water flow, and other factors. The experimental research results show that: ① In the mechanical monitoring test of the cylinder model, with the increase of the water level entering the roadway model, the average and maximum time of the monitoring force of the sensor at a height of 5 cm away from the slope are positively correlated;The mechanical monitoring values appear in a "band" mode, fluctuate up and down the mean level, and follow the approximate normal or normal distribution. The stretched state of the sensor at the height of 45 cm indicates that the human body may slip and lose stability under the action of roadway water flow;② In the test of human standing stability, the difference in human standing stability is obvious under different standing posture in the same current condition, which indicates that the change of the effective area of the human body has a key and sensitive influence on the stability;③ In the test analysis of people wading on 10°, 15° and 20° of roadway slope, when the average speed of people wading drops to about 0.2 m/s,

关键词： mine rescue

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Enhancing mine groundwater system prediction:Full-process simulation of mining-induced spatio-temporal variations in hydraulic conductivities via modularized modeling

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International Journal of Mining Science and Technology 2024年第12期34卷 1625-1642页

作者： Shihao Meng Qiang Wu Yifan Zeng Leiyu Gu National Engineering research Center of coal mine Water Hazard Controlling China University of Mining and Technology-BeijingBeijing 100083China National mine Safety Administration Key Laboratory of mine Water Hazard Controlling Beijing 100083China University of Mining and Technology(Beijing)inner mongolia research institute Inner Mongolia 017000China China Huaneng coal Technology research Co. Ltd.Beijing 100031China

The intricate interplay between rock mechanics and fracture-induced fluid flow during resource extrac-tion exerts profound effects on groundwater systems,posing a pivotal challenge for promoting green and safe development in underground *** address this,a novel numerical model with an explicit coupling simulation strategy is *** model integrates distinct modules for individual physical mechanisms,ensuring second-order accuracy through shared time integration,thereby overcoming lim-itations in simulating mining-induced strata damage,water flow,and permeability dynamics.A novel mathematical model is incorporated into the mechanical simulation to characterize the abrupt increase in permeability resulting from rock fracture *** increase is quantified by evaluating the plastic damage state of rocks and incorporating a damage coefficient that is intrinsically linked to rock *** mechanical model tracks permeability changes due to *** flow model simulates aquifer-mine water interactions by calculating hydraulic conductivity and using dynamic zoning,adapt-ing to mining *** applied to a case study of a complex mine,this approach significantly improved the accuracy of water inflow rate predictions by 57%.

关键词： Time-dependent permeability Overburden damage mine water inflow Fluid-mechanical interaction Modular simulation

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Efficient degradation of organic pollutants by S-NaTaO_(3)/biochar under visible light and the photocatalytic performance of a permonosulfate-based dual-effect catalytic system

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Journal of Environmental Sciences 2023年第3期125卷 388-400页

作者： Yuehui Tai Jinlong Sun Haoran Tian Fuyue Liu Boyu Han Wei Fu Zhangpei Liu Xiuye Yang Qifeng Liu The School of Ecology and Environment Inner Mongolia UniversityHohhot 010021China China National Offshore Oil Corporation Centre Tech Tianjin Chemical Research and Design Institute Co.LtdTianjin 300131China inner mongolia coal Chemical Wastewater Treatment and Resource Utilization Engineering Technology research Center Hohhot 010021China

Removing large concentrations of organic pollutants from water efficiently and quickly under visible light is essential to developing photocatalytic technology and improving solar energy *** study used a simple hydrothermal method to prepare a non-metallic,S-doped NaTaO_(3)(S-NTO) photocatalyst,which was then loaded onto biochar (BC) to form a S-NTO/BC composite *** uniform loading onto BC,the S-NTO particles transformed from cubic to *** photogenerated electron-hole pair recombination probability of the composite photocatalyst was significantly lower than those of the NTO *** light absorption range of the catalyst was effectively widened from 310 nm UV region to visible *** addition,a dual-effect catalytic system was constructed by introducing peroxymonosulfate (PMS) into the environment of the pollution to be *** Rhodamine B,Methyl Orange,Acid Orange 7,tetracycline,and ciprofloxacin degradation efficiency at 40 mg/L reached 99.6%,99.2%,84.5%,67.1%,and 70.7%,respectively,after irradiation by a 40 W lamps for 90 *** high-efficiency visible-light catalytic activity of the dual-effect catalytic system was attributed to doping with non-metallic sulfur and loading of catalysts onto *** development of this dual-effect catalytic system provides new ideas for quickly and efficiently solving the problem of high-concentration organic pollution in aqueous environments,rationally and fully utilizing solar energy,and expanding the application of photocatalytic technology to practice.

关键词： NaTaO_(3) S-doped Biochar Photocatalytic Permonosulfate Dual-effect catalytic system

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Efficient hydrogenolysis of fructose to 1,2-propanediol over bifunctional Ru-WO_(x)-MgO_(y) catalysts under mild reaction conditions via enhancing the chemoselective cleavage of C-C bonds

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Journal of Energy Chemistry 2024年第5期92卷 311-321页

作者： Shuang Luo Tie Shu Min Mao Haijie Yu Yuxin Zheng Daqian Ding Lingmei Liu Kexin Yao Jianjian Wang School of Chemistry and Chemical Engineering State Key Laboratory of Coal Mine Disaster Dynamics and ControlInstitute of Advanced Interdisciplinary StudiesMulti-scale Porous Materials CenterChongqing UniversityChongqing 401331China Key Laboratory for Efficient Conversion and Circular Economy of coal Chemical Engineering CollegeInner Mongolia University of TechnologyHohhot 010051Inner MongoliaChina

Selective conversion of fructose to 1,2-propanediol(1,2-PDO)is considered as a sustainable and cost-effective alternative to petroleum-based processes,however,this approach still faces challenges associated with low efficiency and harsh reaction ***,we have successfully synthesized a novel bifunctional Ru-WO_(x)-MgO_(y) catalyst through a facile'one-pot'solvothermal ***,this catalyst exhibits exceptional catalytic performances in the conversion of fructose to 1,2-PDO under mild reaction *** yield of 1,2-PDO is up to 56.2%at 140°C for 4 h under an ultra-low hydrogen pressure of only 0.2 MPa,surpassing the reported results in recent literature(below 51%).Comprehensive characterizations and density functional theory(DFT)calculations reveal that the presence of oxygen vacancies in the Ru-WO_(x)-MgO_(y) catalyst,serving as active acidic sites,facilitates the chemoselective cleavage of C-C bonds in fructose,which leads to the generation of active intermediates and ultimately resulted in the high yield of 1,2-PDO.

关键词： Biomass Fructose 1,2-Propanediol Retroaldol condensation Heterogenous catalysis

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Ecological-Based Mining:A coal-Water-Thermal Collaborative Paradigm in Ecologically Fragile Areas in Western China

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Engineering 2024年第7期38卷 209-222页

作者： Xiaoxiu Liu Yifan Zeng Qiang Wu Shihao Meng Jiyue Liang Zhuping Hou National Engineering research Center of coal mine Water Hazard Controlling China University of Mining and TechnologyBeijing 100083China College of Geoscience and Surveying Engineering China University of Mining and TechnologyBeijing 100083China University of Mining and Technology(Beijing)inner mongolia research institute Ordos 017000China

A substantial reduction in groundwater level,exacerbated by coal mining activities,is intensifying water scarcity in western China’s ecologically fragile coal mining ***’s national strategic goal of achieving a carbon peak and carbon neutrality has made eco-friendly mining that prioritizes the protection and efficient use of water resources *** on the resource characteristics of mine water and heat hazards,an intensive coal-water-thermal collaborative co-mining paradigm for the duration of the mining process is *** integrated system for the production,supply,and storage of mining companion resources is achieved through technologies such as roof water inrush prevention and control,hydrothermal quality improvement,and deep-injection geological *** active preventive and control system achieved by adjusting the mining technology and a passive system centered on multiobjective drainage and grouting treatment are suggested,in accordance with the original geological characteristics and dynamic process of water *** implementing advanced multi-objective drainage,specifically designed to address the“skylight-type”water inrush mode in the Yulin mining area of Shaanxi Province,a substantial reduction of 50%in water drillings and inflow was achieved,leading to stabilized water conditions that effectively ensure subsequent safe coal *** integrated-energy complementary model that incorporates the clean production concept of heat utilization is also *** findings indicate a potential saving of 8419 t of standard coal by using water and air heat as an alternative heating source for the Xiaojihan coalmine,resulting in an impressive energy conservation of 50.2%and a notable 24.2%reduction in carbon *** ultra-deep sustained water injection of 100 m^(3)·h^(-1)in a single well would not rupture the formation or cause water leakage,and 7.87×10^(5)t of mine water could be effectively stored in the Liujiagou Formation,presenti

关键词： Dual carbon targets coal-water-thermal co-mining Ecologically fragile areas mine-water control Resource utilization

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Evaluation of coal pillar loads during longwall extraction using the numerical method and its application

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Journal of coal Science & Engineering(China) 2013年第3期19卷 269-275页

作者： Jin-He JIA Hong-Pu KANG Xin-Rong ZHANG Department of coal Mining and mine design Tiandi Science & Technology Co. Ltd. Beijing 100013 China State Key Laboratory of coal Mining and Clean Utilization China Coal Research Institute Beijing 100013 China inner mongolia Yitai coal Co. Ltd. Erdos 017000 China

It is very difficult to reasonably evaluate the loads acting on coal pillars in longwall panels during the planning of a new pillar system. The application of empirical equations is a common practice in calculating coal pillar loads while designing a new pillar. This paper proposes numerical models for evaluating coal pillar loads. The key of building a successful numerical model for calculating coal pillar loads lies in the fact that the model should represent the redistribution of stress all over the longwall panels and the surrounding areas, and it is especially important to include the characteristics of the stress rebuilding process in the gob areas, which are crucial for the building process of coal pillar loads. Based on the geo-mechanical background of the Baoshan coal mine, this paper details the procedures of applying numerical models to the evaluation of coal pillar loads and their local practices. The study results show it is feasible and reasonable to use numerical models to evaluate coal pillar loads.

关键词： numerical simulation longwall panel longwall face coal pillar load gob area strain-hardening

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Flow Field and Temperature Field of Water-Cooling-Type Magnetic Coupling

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Chinese Journal of Mechanical Engineering 2019年第4期32卷 61-72页

作者： Lei Wang Zhenyuan Jia Yuqin Zhu Li Zhang School of Mechanical Engineering Dalian University of Technology Dalian 116023China State Key Laboratory of coal mine Safety Technology CCTEG Shenyang Research Institute Fushun 113122 China

At present, the water-cooling simulation of the water-cooled magnetic coupler is based on the water-cooled motor and the hydraulic coupler, which cannot accurately characterize the temperature distribution of the rotating watercooled coupling of the coupler. Focusing on rotating water cooling radiating, the present paper proposes simulating the water cooling temperature field as well as the flow field through the method of combining fluid-solid coupled heat transfer and MRF(Multiphase Reference Frame). In addition, taking an 800 kW magnetic coupling as an example, the paper optimizes the shape, number, cooling water inlet speed? and so on? of the cooling channel. Considering factors such as the complete machine’s temperature, and drag torque, it is proved that the cooling e ect is best when there are 36 involute curved channels and when the inlet speed is 3 m/s. Further, through experiments, the actual temperature values at six di erent positions when 50 kW and 70 kW thermal losses di er are measured. The measured values agree with the simulation results, proving the correctness of the proposed method. Further, data have been collected during the entire experimental procedure? and the variation in the coupling’s temperature is analyzed in depth, with the objective of laying a foundation for the estimation of the inner temperature rise as well as for the optimization of the structural design.

关键词： Water-cooling magnetic coupling Fluid-solid coupling Channel,Three-dimensional temperature field

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Effect of Polyacrylamide Application on Runoff,Erosion,and Soil Nutrient Loss Under Simulated Rainfall

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Pedosphere 2011年第5期21卷 628-638页

作者： WANG Ai-Ping LI Fa-Hu YANG Sheng-Min inner mongolia coal mine design and research institute No. 55 Xinhua Road Hohhot 010010 (China) College of Water Conservancy and Civil Engineering China Agricultural University No. 17 Qinghua East Avenue Haidian District Beijing 100083 (China) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau No. 26 Xinong Road Yangling 712100 (China) Beijing Vocational College of Agriculture No. 5 Daotiannanli Changyang Town Beijing 102442(China)

Soil erosion affects soil productivity and environmental quality.A laboratory research experiment under simulated heavy rainfall with tap water was conducted to investigate the effects of anionic polyacrylamide(PAM) application rates(0,0.5,1.0,and 2.0 g m-2) and molecular weights(12 and 18 Mg mol-1) on runoff,soil erosion,and soil nutrient loss at a slope of 5°.The results showed the two lower rates of PAM application decreased runoff while the highest rate increased runoff as compared with the *** concentration and soil mass loss increased significantly with the increasing PAM application *** with the control,PAM application decreased K+,NH4+,and NO3-concentrations in sediment and K+ and NH+4 concentrations in runoff,but significantly increased the mass losses of K+,NH4+,and NO-3 over soil surface except for the NH4+ at PAM application rate lower than 1.0 g *** application decreased the proportion of K+ loss with runoff to its total mass loss over soil surface from 60.1% to 16.4%.However,it did not affect the NH4+ and NO3-losses with runoff,and more than 86% of them were lost with runoff.A higher PAM molecular weight resulted in less soil erosion and K+ mass loss but had little effect on runoff and NH+4 and *** application did not prevent soil erosion and the mass losses of K+ and NO3-under experimental conditions.

关键词： application rate mass loss molecular weight nutrient concentration sediment concentration

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Theoretical study on the morphology of cobalt nanoparticles modulated by alkali metal promoters

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International Journal of minerals,Metallurgy and Materials 2023年第10期30卷 2006-2013页

作者： Xiaobin Geng Hui Yang Wenping Guo Xiaotong Liu Tao Yang Jinjia Liu National Energy Center for coal to Liquids Synfuels China Co.LtdBeijing 101400China State Key Laboratory of coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China University of Chinese Academy of Sciences Beijing 100049China Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Information Science and Technology UniversityBeijing 100101China School of Computer Beijing Information Science and Technology UniversityBeijing 100101China College of Chemistry and Environmental Science Inner Mongolia Key Laboratory of Green CatalysisInner Mongolia Normal UniversityHohhot 010022China

Cobalt nanoparticles(NPs)catalysts are extensively used in heterogeneous catalytic reactions,and the addition of alkali metal promoters is a common method to modulate the catalytic performance because the catalyst's surface structures and morphologies are sensitive to the addition of ***,the underlying modulation trend remains ***,the adsorption of alkali metal promoters(Na and K)on the surfaces of face-centered-cubic(FCC)and hexagonal-closest packed(HCP)polymorphous cobalt was systematically investigated using density functional ***,the effect of alkali promoters on surface energies and nanoparticle morphologies was revealed on the basis of Wulff *** FCC-Co,the exposed area of the(111)facet in the nanoparticle increases with the adsorption coverage of alkali metal ***,the(311),(110),and(100)facets would disappear under the higher adsorption coverage of alkali *** HCPCo,the Wulff morphology is dominated by the(0001)and(1011)facets and is independent of the alkali metal adsorption *** work provides insights into morphology modulation by alkali metal promoters for the rational design and synthesis of cobalt-based nanomaterials with desired facets and morphologies.

关键词： cobalt nanoparticles alkali promoter density functional theory crystal morphology Wulff construction

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Parameter inversion and location determination of evolutionary weak layer for open-pit mine slope

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International Journal of coal Science & Technology 2020年第4期7卷 714-724页

作者： Zhao Hongze Wang Dongyu Ma Ming Zheng Kaihui School of Energy and Mining Engineering China University of Mining and TechnologyBeijing 100083China State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and TechnologyBeijing 100083China Beijing Reliance coal research institute Beijing 100083China North Weijiamao coal Power Co.Ltd. Ordos 010308Inner MongoliaChina

In light of the complex and dynamic mechanical properties of evolving weak strata in open-pit mines,and the consequent difficulty of determining their mechanical parameters,this study uses the ultimate balance theory,along with the back analysis method combined with monitoring data on field displacement,to carry out parameter inversion using the FLAC3D numerical simulation *** edge slope of a working pit of the Weijiamao open-pit mine was used as research object to this *** the results obtained by the constitutive model were consistent with the field monitoring data,the evolving weak strata in the slope and the position of the landslide in the mine could be *** landslide was directed *** mechanism of the edge slope of the working pit was identified as unloading shear failure,and the feasibility of the method of parameter inversion was *** internal friction angle φand cohesion C of evolving weak strata in the slope of the open-pit mine were also obtained,where this compensated for the deficiency of laboratory tests and enabled the transformation from qualitative to quantitative *** can provide a reliable basis for the safe operation of open-pit mines.

关键词： Open-pit mine Evolution of weak layer Inverse analysis Monitoring data Numerical simulation

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