Image Sharpening Method Of Automatic Loading And Unloading Drill Pipe Target In Underground Coal Mine,
2023
CCTEG Xi’an Research Institute (Group) Co., Ltd., Xi’an 710077, China; China Coal Research Institute, Beijing 100013, China
Image Sharpening Method Of Automatic Loading And Unloading Drill Pipe Target In Underground Coal Mine, Yao Ningping, Liang Chunmiao, Yao Yafeng, Song Haitao
Coal Geology & Exploration
Due to the space limitation of underground roadway in coal mine, the drilling robot is designed with two independent systems, i.e., the drilling system and the drilling pipe loading and unloading system, which are in flexible layout. Using the monocular visual identification based on cooperative target, the drilling system is associated with the drilling pipe loading and unloading system for the cooperative operation of the two systems to deliver the drill pipe. However, there are problems such as borehole cinder, cooperative target polluted by sewage, high dust concentration, low visibility, low luminance of artificial light source, uneven illumination resulting in …
Table Of Contents,
2023
China Coal Technology and Engineering Group (CCTEG)
Application Of Pillar-Free Self-Formed Roadway Technology Under The Influence Of Reserse Faults: Strata Behavior Law And Surrounding Rock Control,
2023
School of Mechanics and Civil Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China; State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China
Application Of Pillar-Free Self-Formed Roadway Technology Under The Influence Of Reserse Faults: Strata Behavior Law And Surrounding Rock Control, Zhang Wenjie, He Manchao, Wang Jiong, Ma Zimin, Cheng Manjiang, Niu Shaokun
Coal Geology & Exploration
To explore the influence of reverse fault activation on the stability of the application of the pillar-free self-formed roadway technology, this study systematically investigated the influencing scope and mechanisms of the reverse fault activation through theoretical analysis, numerical simulations, engineering practice, and field monitoring. The results show that, under the combined action of horizontal tectonic stress and dead weight stress, reverse faults have a significant influence on both the advanced abutment pressure of working faces and the pressure on the roadway roof after coal mining. The reverse fault was locally activated when the working face was close to the reverse …
Reliability Analysis And Compressibility Correction Of Mercury Intrusion Porosimetry Experiments For Low-Medium-Rank Coals,
2023
Institute of Resources & Environment, Henan Polytechnic University, Jiaozuo 454003, China
Reliability Analysis And Compressibility Correction Of Mercury Intrusion Porosimetry Experiments For Low-Medium-Rank Coals, Song Dangyu, Zhao Yuwei, Li Yunbo, Yu Zhen
Coal Geology & Exploration
Low-medium-rank coals are soft and exhibit significant compressibility under high pressure. Therefore, it is debatable whether the pore structure of low-medium-rank coals can be reliably determined using mercury intrusion porosimetry (MIP) experiments. In this study, MIP experiments were conducted on four samples of low-medium-rank coals. By comparing the mercury injection curves of samples with different particle sizes, as well as the macroscopic and microscopic characteristics of the samples before and after mercury injection, this study established a correction method for the mercury injection volume at the high-pressure stage and investigated the reliability of MIP experiments in determining the pore structure …
Influencing Mechanisms Of Sc-Co2 Extraction On The Microstructures Of High-Rank Tectonic Coals,
2023
College of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China
Influencing Mechanisms Of Sc-Co2 Extraction On The Microstructures Of High-Rank Tectonic Coals, Zhang Xiaodong, Zhang Yu, Zhang Shuo, Li Guizhong, Li Xianzhong
Coal Geology & Exploration
This study aims to reveal the influencing patterns of supercritical CO2 (SC-CO2) on the microstructures of tectonic coals during the injection of CO2 into deep coal seams. The study conducted SC-CO2 extraction experiments on two types of high-rank coal samples with different damage degrees, namely the lean coal samples from the Daping coal mine in Shanxi Province and the anthracite samples from the Zhenxing coal mine in Guizhou Province. Accordingly, this study compared the parameters of pore structures and aromatic carbon stacking structures in the coal samples before and after the extraction experiments. Finally, this …
In-Situ Stress Calculation For Coal Reservoirs Based On Log Parameters: A Case Study Of The Southern Yanchuan Block,
2023
School of Energy Resources, China University of Geosciences (Beijing), Beijing 100083, China; Coal Reservoir Laboratory of National Engineering Research Center of CBM Development & Utilization, Beijing 100083, China
In-Situ Stress Calculation For Coal Reservoirs Based On Log Parameters: A Case Study Of The Southern Yanchuan Block, Chang Chuang, Li Song, Tang Dazhen, Feng Peng
Coal Geology & Exploration
In-situ stress affects the permeability of coal reservoirs throughout the extraction of coalbed methane (CBM) and further influences the migration and output of CBM. To explore the effective methods for calculating the in-situ stress in coal seams, this study investigated the southern Yanchuan block at the eastern margin of the Ordos Basin. Based on the logs and well test data of the major coal seams in the study area, as well as the calculation results of parameters including the coal rock Poisson's ratio, modulus of elasticity, and reservoir pressure of coals, this study built a calculation model for the in-situ …
Differences In The Adsorption/Desorption Characteristics Of Coal Reservoirs With Different Coal Ranks And Their Effects On The Reservoir Productivity,
2023
College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Shanxi Key Laboratory of Coal and Coal-measure Gas Geology, Taiyuan 030024, China
Differences In The Adsorption/Desorption Characteristics Of Coal Reservoirs With Different Coal Ranks And Their Effects On The Reservoir Productivity, Wang Qingqing, Meng Yanjun, Yan Taotao, Liu Zhenxing, Xu Guangbo, Li Kunjie, Liu Yanfei
Coal Geology & Exploration
Adsorption/desorption parameters are critical to the evaluation of the reserves and productivity potential of coalbed methane (CBM). Moreover, the law governing the desorption process is closely related to the productivity of CBM wells. This study aims to investigate the adsorption/desorption characteristics of coal reservoirs with different coal ranks and their effects on the productivity of the reservoirs. Based on the data of the coal macerals, coal quality, gas content, and isothermal adsorption experiments of 49 coal core samples from the Fanzhuang and Anze blocks in the southern Qinshui Basin and the Baode and Liulin blocks in the eastern Ordos Basin, …
Research On Dynamic Subsidence Characteristics Of Coal Mine Industrial Square Based On D-Insar Technology,
2023
School of Resources and Environment Engineering, Anhui University, Hefei 230601, China; Anhui Province Engineering Laboratory for Mine Ecological Remediation, Hefei 230601, China
Research On Dynamic Subsidence Characteristics Of Coal Mine Industrial Square Based On D-Insar Technology, Liu Hui, Chen Sidi, Zhu Xiaojun, Zhang Pengfei, Wang Jinzheng, Wang Qingwei, Si Guangya
Coal Geology & Exploration
In recent years, the subsidence has occurred continuously to the industrial squares of mining areas in the thick water-bearing loose layer in eastern China, resulting in various extent of damage to the surface buildings (structures), which has seriously affected the safe production and normal operation of coal mines. In order to study the subsidence of industrial square in a long series, the dynamic deformation information of the surface was obtained based on 17 scenes of Sentinel-1A image data of a coal mine in Eastern China. On this basis, the surface subsidence monitoring accuracy of D-InSAR technology was analyzed in combination …
Slip Resistance Effect Of Pile-Soil Interface Inclination Angle And Moisture Content On The Anti-Sliding Pile,
2023
School of Highway, Chang’an University, Xi’an 710064, China
Slip Resistance Effect Of Pile-Soil Interface Inclination Angle And Moisture Content On The Anti-Sliding Pile, Li Huaixin, Yan Changgen, Lin Bin, Shi Yuling
Coal Geology & Exploration
To study the slip resistance effect of pile-soil interface with different interface inclination angle and moisture content, the variability of damage modes and shear strengths of assemblies with variable inclination angles under the different conditions of interface inclination angles and water content were compared based on the triaxial unconsolidated undrained test at first. Then, the slip resistance effects of the pile-soil interface with different interface inclination angles and moisture contents were compared by numerical simulation, with consideration to the shear strength parameter of laboratory test. Meanwhile, the critical moisture content wmax was determined based on the plastic deformation theory. …
Technology Of Raising Upper Limit Of Mining By Grouting Reconstruction In Thick Water-Bearing Sand Layer And Its Application,
2023
CCTEG Xi’an Research Institute (Group) Co., Ltd., Xi’an 710077, China; Shaanxi Key Laboratory of Prevention and Control Technology for Coal Mine Water Hazard, Xi’an 710077, China
Technology Of Raising Upper Limit Of Mining By Grouting Reconstruction In Thick Water-Bearing Sand Layer And Its Application, Xing Maolin, Zheng Shitian, Shi Zhiyuan, Zhao Shaolei, Du Botao, Cui Siyuan
Coal Geology & Exploration
In order to set anti-collapse coal (rock) pillars in the thick loose water-bearing sand layer to raise the upper limit of mining, the grouting transformation technology of thick water-bearing sand layer was studied. Aiming at raising the upper limit of mining in the fourth aquifer in working face 1010-1 of Wugou Coal Mine in Huaibei, Anhui. The analysis is conducted through theoretical calculation, experiments on of grouting materials ratio, and in-situ grouting test, with a focus on the scope and horizon of transformation, the applicability of grouting materials, the mix ratio of grout at different depths, the arrangement of drilling …
Predicting The Water-Yield Properties Of K2 Limestones Based On Multivariate Lstm Neural Network: A Case Study Of The Poli Mining Area In Yangquan,
2023
State Key Laboratory for Coal Resources and Safe Mining, China University of Mining and Technology (Beijing), Beijing 100083, China
Predicting The Water-Yield Properties Of K2 Limestones Based On Multivariate Lstm Neural Network: A Case Study Of The Poli Mining Area In Yangquan, Shi Suzhen, Shi Guifei, Liu Zuiliang, Li Li, Yao Xuejun, Pei Jinbo, He Yazhou
Coal Geology & Exploration
The Taiyuan Formation K2 limestones are the main aquifer in the upper part of the No.15 coal seam in the Poli mining area, Yangquan City. Therefore, determining the water yield properties of K2 limestones is critical to the safe mining of coal seams in the upper and lower formations. To determine the exact distribution of areas with high water-yield properties of the K2 limestones, this study determined the accurate spatial distribution of K2 limestones using the conventional wave impedance inversion firstly. Then, nine optimal seismic attributes were selected using the Pearson correlation coefficient method and the …
A Method For Identifying Karst Collapse Columns Based On An Improved Residual Network,
2023
Smart City College, Beijing Union University, Beijing 100101, China
A Method For Identifying Karst Collapse Columns Based On An Improved Residual Network, Zhang Tian, Sun Lianying, Yang Yan, Tu Shuai, Wang Jinfeng
Coal Geology & Exploration
Coal mining areas have complex geological conditions, and it is critical to predict and identify karst collapse columns in these areas efficiently and accurately. Human-computer interaction is the most frequently employed to interpret karst collapse columns in traditional methods. However, with an increase in the exploration scale and the constant accumulation of generated data, the traditional manual interpretation of karst collapse columns cannot meet the demand for actual coal mining. To improve the identification accuracy of karst collapse columns, this study proposes a Collapse Column Identification Network (CINet) model, which takes the automatic recognition of karst collapse columns as binary …
3d Model Reconstruction Of Large-Diameter Rescue Well Based On Depth Camera,
2023
National Engineering Research Center of Highway Maintenance Equipment, Chang’an University, Xi’an 710064, China
3d Model Reconstruction Of Large-Diameter Rescue Well Based On Depth Camera, Gu Hairong, Luo Jia, Gao Ziyu, Yang Wenjuan, Han Shuai
Coal Geology & Exploration
Large-diameter borehole rescue is an effective emergency rescue method for mine disasters. Through the large-diameter rescue well that is constructed to the place where the trapped personnel is located, the trapped personnel can be lifted safely and reliably to the ground by a hoisting capsule. The structural parameters of a large-diameter rescue well and their changes have significant impact on the passing performance of the hoisting capsule. The real-time acquisition of the structural parameters of large-diameter rescue well is the basis of scientific operation and decision-making of large-diameter borehole rescue. In order to satisfy the requirements for monitoring of the …
Study On Factors Influencing The Self-Propelling Capacity Of Self-Propelled Water Jet Drill Bits,
2023
State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo 454000 , China; State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization, Henan Polytechnic University, Jiaozuo 454000, China
Study On Factors Influencing The Self-Propelling Capacity Of Self-Propelled Water Jet Drill Bits, Liu Yong, Dai Shuo, Wei Jianping, Zhang Hongtu, Yuan Yongwang, Guo Xinhui, Gao Yingjun
Coal Geology & Exploration
The structural characteristics of inner flow field in a pipeline are the key factors influencing the self-propelling capacity and descaling-unblocking capability of the self-propelled drill bit. To address the problem concerning the effect of the changes in the inner flow field of a pipeline under the joint action of multiple jets on the self-propelling force and the resistance to water backflow, the changes of inner flow field in the pipeline under different conditions were numerically analyzed based on FLUENT, and thus the influence law of the angle of rear nozzle, the rotational speed, the annular ratio and the system pressure …
Community Microgrids As An Equitable Climate Resilience And Adaptation Strategy In California,
2023
The University of San Francisco
Community Microgrids As An Equitable Climate Resilience And Adaptation Strategy In California, Savanna Olivia Smith
Master's Projects and Capstones
Climate change summons more extreme and frequent weather events that threaten communities’ access to power. Without power, businesses lose revenue, essential services are limited, people are exposed to extreme temperatures, and lives are lost. California has adopted microgrids as a solution to costly power outages, electrification needs, and renewable energy goals. This work evaluates the adoption of microgrids as an equitable climate resilience and adaptation strategy through a geospatial analysis of California’s resilience investment needs, a case study analysis of 9 existing tribal and rural microgrids, and a gap analysis of California and federal policies and incentive programs. Programs like …
Clean Energy At The Crossroads Of America: An Integrated Resource Plan For Northern Indiana Public Service Company, Llc (Nipsco),
2023
University of San Francisco
Clean Energy At The Crossroads Of America: An Integrated Resource Plan For Northern Indiana Public Service Company, Llc (Nipsco), Saad Z. Khan, Shend Boshnjaku
Master's Projects and Capstones
This paper outlines an Integrated Resource Plan (IRP) for the Indiana electric utility company, NIPSCO, looking forward to the year 2050 and evaluating different pathways to net zero emissions from the power generation sector. It is a plan for the future, identifying the most cost-effective and reliable mix of resources to meet the energy needs of NIPSCO's customers and reaching decarbonization goals by mid-century.
Climate Change Impacts To Oil Spill Risk And Assessing California's Preparedness,
2023
The University of San Francisco
Climate Change Impacts To Oil Spill Risk And Assessing California's Preparedness, Adeline L. Ford
Master's Projects and Capstones
This report investigates the possibility that climate change could increase the risk of oil spills in California. The primary climate change impact reviewed is the increasing severity of storms and extreme weather events. Natural disasters can be the initiating cause of technological accidents and the increasing severity or frequency of intense storms may increase the likelihood of an oil spill from refineries, extraction/drilling rigs, or oil in transport. A literature review of climate adaptation strategies and storm intensity predictions was completed to determine if severe storm events are expected to increase in intensity or frequency. A review of oil spill …
An Integrated Resource Plan For Tucson Electric Power Company, 2020-2050,
2023
University of San Francisco
An Integrated Resource Plan For Tucson Electric Power Company, 2020-2050, Timothy Gary Sheehan Jr, Danny Alexander Zepeda
Master's Projects and Capstones
According to the Environmental Protection Agency, the United States electric power industry is responsible for 25% of the country’s greenhouse gas emissions. As a result, many utilities face state mandates which force electric utilities to reduce their emissions by decreasing reliance on fossil fuels. An Integrated Resource Plan (IRP) is the primary method by which electric utilities plan all aspects of future electricity supply and demand, presenting how the company will deliver reliable and affordable energy while meeting statutory requirements. We propose three IRP scenarios through 2050 for Tucson Electric Power (TEP), an electric utility in southern Arizona. The first …
Desal In So. Cal - Are We There Yet?,
2023
The University of San Francisco
Desal In So. Cal - Are We There Yet?, Luke F. Swanson
Master's Projects and Capstones
Southern California has access to a finite amount of water that is vulnerable to the state’s changing climate and growing population. The increasing population’s water demands and hydrologic variability due to climate change inspire different proposals to solve these water limitations. Seawater or brackish water desalination and wastewater recycling are all water resources that have the potential to help meet the water needs of Southern California, specifically the South Coast Hydrologic Region. Every water resource requires energy to transport, treat, and distribute the water for use; in an era of climate change, when energy use contributes to greenhouse gases, utilities …
Energy And Climate Change Issues Around Csudh,
2023
California State University, Dominguez Hills
Energy And Climate Change Issues Around Csudh, Alex E. Perez, Tara B. Jones, Raju Bista, Parveen K. Chhetri
CSU Journal of Sustainability and Climate Change
Climate change is posing significant challenges to California’s energy sector. Extreme weather events (heat and cold) may pressure existing infrastructure. Many studies have indicated that extreme climate events would impact the energy system by affecting peak electricity demand. However, very few studies have been conducted to understand how disadvantaged communities (DACs) will be impacted. Because of unequal access to energy infrastructure (electricity generation and battery storage), DACs are more vulnerable to power outages due to the rising number of significant weather events caused by climate change. To address the issue of how DACs are disproportionately affected by climate change-related energy …
