Evaluating The Exploitation And Utilization Prospects Of Hot Dry Rock In Bohai Bay Basin: Understanding Based On Numerical Simulations For Exploitation Optimization,
2024
College of Geosciences, China University of Petroleum (Beijing), Beijing 102249, China; National Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum (Beijing), Beijing 102249, China
Evaluating The Exploitation And Utilization Prospects Of Hot Dry Rock In Bohai Bay Basin: Understanding Based On Numerical Simulations For Exploitation Optimization, Jiang Xiaoxue, Zhu Chuanqing, Ding Rui, Xie Fang, Qiu Nansheng
Coal Geology & Exploration
The Bohai Bay Basin, characterized by high terrestrial heat flow, formation temperatures average of 175℃ at a depth of 5000 m, and reservoirs with lithologies dominated by low-porosity and low-permeability metamorphic and igneous rocks, meets the requirements for the formation of hot dry rock (HDR) resources. Based on geothermal parameters such as terrestrial heat flow, rock thermal conductivity, and heat production rate, this study established a three-dimensional HDR exploitation model with thermo-hydro coupling using the COMSOL software. Furthermore, this study analyzed the effects of spacing between production and reinjection wells, reinjection and production rates, and well arrangement mode on the …
Influencing Patterns Of Multiple Factors On The Heat Transfer Performance Of Moderately Deep Geothermal Wells,
2024
CCTEG Xi’an Research Institute (Group) Co., Ltd., Xi’an 710077, China; CCTEG Xi’an Geothermal Energy Development Co., Ltd., Xi’an 712100, China
Influencing Patterns Of Multiple Factors On The Heat Transfer Performance Of Moderately Deep Geothermal Wells, Han Yongliang, Wang Kaipeng, Wang Yijie, Gou Li, Yang Yanbin, Lei Yanzi, Wu Fangli, Shen Hao
Coal Geology & Exploration
Vigorously promoting the technology for heating using moderately deep geothermal energy serves as an important measure for China’s pursuit of carbon neutrality and peak carbon dioxide emissions. A coaxial double-pipe heat transfer system for moderately deep geothermal wells can avoid damage to groundwater resources and the environment. Furthermore, the influencing factors of the wells exhibit complicated and nonlinear interactions. Based on the theoretical analysis and mathematical description of a moderately deep well with a coaxial double-pipe heat exchanger, this study established a layered heat transfer model for the geothermal well and verified its reliability. This study investigated a moderately deep …
Effects Of Fracture Distribution On Heat Extraction Through Co2-Egs,
2024
College of Civil Engineering, Guizhou University, Guiyang 550025, China
Effects Of Fracture Distribution On Heat Extraction Through Co2-Egs, Zhou Qing, Liao Jianxing, Xu Bin, Yao Liang, Zhou Haoyu, Zhao Quan
Coal Geology & Exploration
Geothermal energy, a promising source of renewable energy, has attracted considerable attention. In deep geothermal reservoirs, complex fracture networks formed by artificial stimulation provide predominant channels for heat extraction. Therefore, the spatial distribution of fractures directly affects the heat extraction efficiency. This study aims to explore the effects of different spatial distributions of fractures on the heat recovery performance. Based on the fracture network following a power-law distribution, this study systematically investigated the effects of the fracture network with different values of fracture length index (a) and density (β) on the heat recovery performance of a …
Statistical Analysis Of The Spatial Distribution And Genesis Of Lithium In Geothermal Water In The Yangbajing-Gulu Rift, Xizang,
2024
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China; School of Geoscience & Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
Statistical Analysis Of The Spatial Distribution And Genesis Of Lithium In Geothermal Water In The Yangbajing-Gulu Rift, Xizang, Chen Yakui, Kong Yanlong, Duan Jiabin, Sun Wenjie, Cheng Yuanzhi
Coal Geology & Exploration
In the Yangbajing-Gulu rift, located in Xizang, the lithium concentration in geothermal water exceeds the average level of thermal springs in Xizang. However, the hydrochemical genesis of lithium in geothermal water in this rift remains controversial, and one primary reason for this is the unclear spatial distribution pattern of lithium. Common methods for analyzing spatial distribution patterns include Ordinary Kriging and CO-Kriging. Nevertheless, the former suffers low precision. For the latter, it is difficult to obtain suitable auxiliary variables. Given this, this study determined two auxiliary variables: (1) the Cl− concentration, a physicochemical parameter exhibiting the strongest correlation with …
Table Of Contents,
2024
China Coal Technology and Engineering Group (CCTEG)
Thermal Conductivity Column Of Rocks And Distribution Characteristics Of Paleo-Geothermal Field In The Songliao Basin,
2024
National Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum (Beijing), Beijing 102249, China; College of Geosciences, China University of Petroleum (Beijing), Beijing 102249, China
Thermal Conductivity Column Of Rocks And Distribution Characteristics Of Paleo-Geothermal Field In The Songliao Basin, Tang Boning, Qiu Nansheng, Zhu Chuanqing, Chang Jian, Li Xiao, Huang Yue, Yang Junsheng, Fu Xiuli
Coal Geology & Exploration
The paleo-geothermal field of a basin is closely related to the formation and evolution of geothermal, oil, and gas resources. To ascertain the characteristics of the paleo-geothermal field in the Songliao Basin during some critical periods, this study established the thermal conductivity column of rocks in the basin using measurements from 269 samples and compiled previous data. Then, it simulated the burial and thermal histories of multiple wells under the constraint of vitrinite reflectance (Rran). The results indicate that the thermal conductivity of the Songliao Basin increases with the depth, with increasing rates higher in the upper …
Genetic Mechanisms Of Hot Dry Rock Geothermal Resources In Central Inner Mongolia,
2024
Shenzhen New Energy Research Institute, PetroChina, Shenzhen 518052, China
Genetic Mechanisms Of Hot Dry Rock Geothermal Resources In Central Inner Mongolia, Xiong Bo, Xu Hao, Tang Shuling, Wang Shejiao, Fang Chaohe, Xin Fudong, Wu Jingjie, Wei Xiangquan, Song Xuejing, Wang Jinwei
Coal Geology & Exploration
Central Inner Mongolia, located at the junction of plates, has undergone multi-phase tectono-magmatic activities and boasts abundant shallow hydrothermal resources. However, there is a lack of in-depth research on deep hot dry rock (HDR) geothermal resources in this region. Based on the regional geological and tectonic settings, magnetotelluric sounding results, and geothermal anomaly manifestations, this study systematically explored the genetic mechanisms and geodynamic process of HDR geothermal resources in central Inner Mongolia and determined the genetic modes of HDRs. The results show that the major heat sources of deep HDR geothermal resources in the region include deep local melts and …
Heat Source-Related Mechanisms And Genetic Modes For The Formation Of Hot Dry Rocks In The Reshuiwei Geothermal Field, Hunan Province,
2024
Geophysical and Geochemical Survey Institute of Hunan, Changsha 410014, China; Hunan Geological New Energy Exploration and Development Engineering Technology Research Center, Changsha 410014, China
Heat Source-Related Mechanisms And Genetic Modes For The Formation Of Hot Dry Rocks In The Reshuiwei Geothermal Field, Hunan Province, Du Jiang, Cai Ningbo, Zhang Baojian, Wang Keying, He Lihong, Liao Fengchu
Coal Geology & Exploration
Hot springs with temperatures exceeding 90℃ indicate that the Reshuiwei geothermal field in Hunan Province enjoys sound geothermal geological conditions, making this geothermal field a potential favorable area for hot dry rock (HDR) exploration. To carry out a reasonable evaluation of the geothermal reservoir and prospects for exploration and exploitation of HDRs in the Reshuiwei geothermal field in the Rucheng area, this study comprehensively analyzed the deep geological structures, geochemical characteristics, geophysical characteristics including gravity, magnetic, electrical, and seismic properties, and geothermal field characteristics of the geothermal field. Furthermore, it revealed the deep thermal structures of the geothermal field from …
Long-Term Operation Performance Of Medium-Deep Borehole Heat Exchangers In The Guanzhong Area,
2024
School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Long-Term Operation Performance Of Medium-Deep Borehole Heat Exchangers In The Guanzhong Area, Zhang Zhibin, Ma Zhendi, Hao Jianke, Jia Guosheng, Ke Tingting, Cheng Chonghua, Jin Liwen
Coal Geology & Exploration
Technologies for heating utilizing medium-deep geothermal energy exhibit promising application prospects in the Guanzhong area of China, which boasts abundant geothermal resources. Geological parameters serve as determining factors in the performance of medium-deep borehole heating systems. This study aims to explore the performance of medium-deep borehole heating systems in the Guanzhong area, Shaanxi Province. First, this study analyzed the geological parameters of five typical areas in Guanzhong: Xingping City under the jurisdiction of Xianyang City, Weicheng District of Xianyang, and Gaoling, Huyi, and Chang’an districts of Xi’an City. Then, by combining the typical structural parameters of buried pipes, this study …
Influencing Factor Analysis And Optimization Of Heat Extraction Performance Of Moderately Deep Coaxial Borehole Heat Exchangers In Northern Shaanxi, China,
2024
Shaanxi Hancheng Tianjiu Grouting Exploration Co., Ltd., Weinan 715499, China; School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Influencing Factor Analysis And Optimization Of Heat Extraction Performance Of Moderately Deep Coaxial Borehole Heat Exchangers In Northern Shaanxi, China, Zou Haijiang, Li Yongpeng, Zhang Lin, Hui Peng, Liu Houning, Shen Fang, Wang Fenghao
Coal Geology & Exploration
The geothermal heating technology utilizing moderately deep coaxial borehole heat exchangers (MDCBHEs) has emerged and found extensive applications in urban heating in northern China. Despite abundant geothermal resources, northern Shaanxi exhibits slightly low geothermal gradients and distinct thermophysical properties of rocks and soils. Therefore, geological parameters influence the heat transfer performance of MDCBHEs in this area. Using OpenGeoSys, an open-source numerical simulation platform, this study established a three-dimensional calculation model for heat transfer between a MDCBHE and surrounding strata. Based on typical geological parameters in northern Shaanxi, the study investigated the influence of various design parameters on the heat transfer …
Heating Experiments Of A Solar-Assisted Heat Pump And Thermal Equilibrium Simulations Of Geothermal Fields,
2024
Beijing Institute of Geothermal Investigation, Beijing 102218, China; Key Laboratory of Shallow Geothermal Energy, Ministry of Natural Resources, Beijing 100195, China
Heating Experiments Of A Solar-Assisted Heat Pump And Thermal Equilibrium Simulations Of Geothermal Fields, Jia Zilong, Zheng Jia, Zhang Yaobin, Chen Ke, Liu Aihua, Li Juan
Coal Geology & Exploration
This study aims to explore technologies required for clean energy heating by means of multi-energy complementation, with the purpose of meeting the demand for clean heating in decentralized buildings in Beijing's villages and towns. To this end, this study built a solar-ground source heat pump (SGHP) compound system in a rural area of Beijing. Then, it carried out heating experiments of the solar-assisted heat pump system and thermal equilibrium simulations of geothermal fields using the COMSOL software. The results are as follows: (1) Compared to a single SGHP system, the solar-assisted heat pump scheme increased the outlet water temperature on …
Dielectric Permittivity Of Pzt 95/5 Ferroelectric Ceramics And 0.27pin-Pmn-0.26pt Single Crystals Under Pulsed High Electric Fields,
2024
Missouri University of Science and Technology
Dielectric Permittivity Of Pzt 95/5 Ferroelectric Ceramics And 0.27pin-Pmn-0.26pt Single Crystals Under Pulsed High Electric Fields, Sergey I. Shkuratov, Jason Baird, Vladimir G. Antipov, Christopher S. Lynch
Mining Engineering Faculty Research & Creative Works
The dependence of the dielectric permittivity of ferroelectric materials on electric field magnitude impacts the performance of ferroelectric devices. In a ferroelectric generator, a shock wave travels through the ferroelectric element and depolarizes it, and surface charges are released from the element electrodes, resulting in the generation of a megawatt power level for several microseconds. The dielectric properties of the compressed and uncompressed zones of the ferroelectric element affect the generated voltage and energy. The results of previous studies indicate that the low-field dielectric permittivity of poled Pb0.99(Zr0.95Ti0.05)0.98Nb0.02O3 (PZT 95/5) ferroelectrics in the uncompressed zone differs significantly from the high-field …
Suitability Of The Height Above Nearest Drainage (Hand) Model For Flood Inundation Mapping In Data-Scarce Regions: A Comparative Analysis With Hydrodynamic Models,
2024
School of Engineering
Suitability Of The Height Above Nearest Drainage (Hand) Model For Flood Inundation Mapping In Data-Scarce Regions: A Comparative Analysis With Hydrodynamic Models, Navin Tony Thalakkottukara, Jobin Thomas, Melanie Watkins, Benjamin C. Holland, Thomas Oommen, Himanshu Grover
Michigan Tech Publications
Unprecedented floods from extreme rainfall events worldwide emphasize the need for flood inundation mapping for floodplain management and risk reduction. Access to flood inundation maps and risk evaluation tools remains challenging in most parts of the world, particularly in rural regions, leading to decreased flood resilience. The use of hydraulic and hydrodynamic models in rural areas has been hindered by excessive data and computational requirements. In this study, we mapped the flood inundation in Huron Creek watershed, Michigan, USA for an extreme rainfall event (1000-year return period) that occurred in 2018 (Father’s Day Flood) using the Height Above Nearest Drainage …
The Valuation Of Exit Option In A Lignite Mine Using Monte Carlo Simulation,
2024
University of Szczecin, Department of Banking and Finance, Poland
The Valuation Of Exit Option In A Lignite Mine Using Monte Carlo Simulation, Marcin Pawlak, Tomasz Wiśniewski
Journal of Sustainable Mining
This study aims to demonstrate the application of simulation techniques to the valuation of real options. The nature of the paper is methodological and empirical. The purpose of the valuation of the option to close a lignite mine in Poland is to demonstrate the methodology and advantages of employing Monte Carlo simulation in the valuation of real options. Close to actual numerical data reveals a complex optimization problem in the context of strategy selection by decision-makers. Numerous factors (extraction costs, reclamation costs, the write-off for the reclamation fund, etc.), their interpenetration and multilevel influence on the decision to close the …
Mathematical Model For The Management Of The Wave Processes In Three-Winding Transformers With Consideration Of The Main Magnetic Flux In Mining Industry,
2024
Lviv Polytechnic National University, 79013, L'vov, Stepana Bandera st., 12, Ukraine
Mathematical Model For The Management Of The Wave Processes In Three-Winding Transformers With Consideration Of The Main Magnetic Flux In Mining Industry, M. S. Seheda, O. S. Beshta, P. F. Gogolyuk, Yu. V. Blyznak, R. D. Dychkovskyi, A. Smoliński
Journal of Sustainable Mining
The aim of the work is to study the wave processes in three-winding power transformers caused by impulse overvoltage, to create an improved mathematical model for reproducing the process of distribution and transmission of the impulse in the windings of a three-winding power transformer. A mathematical model has been developed for the study of internal overvoltage in the windings of three-winding power transformers, based on the proposed substitute circuit of an infinitesimal element, taking into account the longitudinal and transverse inductive connections between the turns of the winding, the electromagnetic connections between the windings and the flux splitting from the …
The Effect Of Blasting Using Low-Density Emulsion Explosives,
2024
Faculty of Mining, Geology and Petroleum Engineering, Department of Mining Engineering and Geotechnical Engineering, University of Zagreb, Pierottijeva 6, 10000, Zagreb, Croatia
The Effect Of Blasting Using Low-Density Emulsion Explosives, Vinko Škrlec, Mario Dobrilović, Barbara Štimac Tumara, Vječislav Bohanek
Journal of Sustainable Mining
Low-density emulsion explosives are essentially blends of an emulsion matrix and a certain amount of gaseous phase inclusions acting as hot spots. With the addition of expanded polystyrene for gaseous sensibilization, the resulting explosive blend was developed to reduce peak values and pressure impulse of gaseous detonation products on surrounding rock. This resulted in a decrease in rock stress and a decrease in cracking zone width outside of the minefield boundary. The use of low-density emulsion explosives correlates with the decrease in the seismic effect of blasting, more precisely, the decrease of induced rock oscillation velocities. The low-density emulsion explosive …
Numerical Simulation On Effect Of Coal Pillar Width On Stability Of Retained Roadway: A Case Study Of Khe Cham Coal Mine, Vietnam,
2024
Faculty of Mining, Hanoi University of Mining and Geology, Vietnam
Numerical Simulation On Effect Of Coal Pillar Width On Stability Of Retained Roadway: A Case Study Of Khe Cham Coal Mine, Vietnam, Quang Phuc Le, Tien Dung Le
Journal of Sustainable Mining
When extracting coal seams in Vietnam underground mines, coal pillars are often left unmined for the protection of retained roadways in the longwall mining method. During longwall mining operations, coal pillars are often placed where high-stress concentrations occur in the abutment pressure zone of adjacent panels, especially when extracting seams under hard-to-cave main roof conditions. The instability of coal pillars under the loading of the main roof may cause the roadway to collapse, threatening the safe operation of a coal mine. This paper presents a detailed numerical investigation of the effect of coal pillar width on the stability of retained …
Cav-Ad: A Robust Framework For Detection Of Anomalous Data And Malicious Sensors In Cav Networks,
2024
Missouri University of Science and Technology
Cav-Ad: A Robust Framework For Detection Of Anomalous Data And Malicious Sensors In Cav Networks, Md Sazedur Rahman, Mohamed Elmahallawy, Sanjay Madria, Samuel Frimpong
Computer Science Faculty Research & Creative Works
The adoption of connected and automated vehicles (CAVs) has sparked considerable interest across diverse industries, including public transportation, underground mining, and agriculture sectors. However, CAVs' reliance on sensor readings makes them vulnerable to significant threats. Manipulating these readings can compromise CAV network security, posing serious risks for malicious activities. Although several anomaly detection (AD) approaches for CAV networks are proposed, they often fail to: i) detect multiple anomalies in specific sensor(s) with high accuracy or F1 score, and ii) identify the specific sensor being attacked. In response, this paper proposes a novel framework tailored to CAV networks, called CAV-AD, for …
Generation Of Micro-Fracture Clouds In Rocks: Mechanisms And Applications,
2024
Missouri University of Science and Technology
Generation Of Micro-Fracture Clouds In Rocks: Mechanisms And Applications, U. Mutlu, G. Boitnott, A. Lisjak, O. Mahabadi, Taghi Sherizadeh, D. Guner, S. Nowak, A. Ghassemi
Mining Engineering Faculty Research & Creative Works
Volume increasing or decreasing processes in rocks can lead to inter or intragranular fractures in subsurface formations. The volume change can be caused by chemical reactions involving fluid, reactive transport, and coupling with the mechanical deformation of the grains. Depending on stress, material properties and coupled thermo-hydro-mechanical-chemical (THMC) conditions, grain scale fractures may propagate and coalesce, forming a cloud of well-connected fracture networks. The mechanisms responsible for propagation, coalescence and inhibition of cloud fractures are not well known. In this study, we review coupled micro-fracture network generation mechanisms as published in the literature and observed in field, experiments, and models. …
Minerrouter : Effective Message Routing Using Contact-Graphs And Location Prediction In Underground Mine,
2024
Missouri University of Science and Technology
Minerrouter : Effective Message Routing Using Contact-Graphs And Location Prediction In Underground Mine, Abhay Goyal, Sanjay Madria, Samuel Frimpong
Computer Science Faculty Research & Creative Works
Location-based distributed communication in underground mines has been a hard problem to solve due to unreliable centralized architecture such as leaky feeder systems, high attenuation, and the unavailability of GPS signals. Delay Tolerant Networks (DTN) enable decentralized message routing using the store-carry-forward method that can help in creating situational awareness needed to handle emergency and disaster scenarios. The ability to predict where the DTN nodes (miner) might have been at/are headed to (with respect to the mine regions and pillars) at different times, combined with contact-based routing and intelligent handling of buffer, can be used for better delivery of messages. …
