Sedimentary Coal-Controlling Effect And Coal-Forming Model Of Paleogene Coal Measures In Paralic Faulted Basin：A Case Study Of Huangxian Basin, Shandong Province,
2023
College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Sedimentary Coal-Controlling Effect And Coal-Forming Model Of Paleogene Coal Measures In Paralic Faulted Basin：A Case Study Of Huangxian Basin, Shandong Province, Wu Yue, Wang Dongdong, Wang Hailiang, Liu Haiyan, Li Zengxue, Zheng Xue
Coal Geology & Exploration
There are abundant coal-type oil and gas resources in Chinese sea area, but few researches have been conducted on the coal-type source rock, which seriously restricts the exploration of coal-type oil and gas resources in the sea area. Herein, this study on sedimentary coal-controlling effect and coal-forming model was carried out based on Huangxian Basin that is a paralic faulted basin with same coal-forming period, similar geological conditions and high degree of research for the coal basins in the sea area. Specifically, the pattern, evolution and sedimentary coal-controlling effect of paleogeography during the coal-forming period were reconstructed with full consideration …
Deterioration Characteristics Of Water-Rock Interaction On Combustion Metamorphic Rocks In Northern Shaanxi,
2023
Shaaxi Key Laboratory of Prevention and Control Technology for Coal Mine Water Hazard, Xi’an 710077, China; Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi’an 710054, China; School of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China
Deterioration Characteristics Of Water-Rock Interaction On Combustion Metamorphic Rocks In Northern Shaanxi, Hu Xin, Sun Qiang, Yan Changgen, Zhao Chunhu, Wang Shaofei
Coal Geology & Exploration
There are a lot of combustion metamorphic (CM) rocks formed by high temperature baking of coal fires in the border area of Shaanxi, Shanxi and Inner Mongolia in the northeastern margin of Ordos Basin. Compared with the virgin rock, the rock mass subjected to combustion metamorphism is broken in structure, with pores developed, and a large number of dangerous rock masses are formed under the long-term water-rock interaction. Herein, 50 dry-wet cycle experiments were carried out with the CM rocks in Daliuta Area of Shenmu in Shaanxi Province. Meanwhile, the changes in the physical and mechanical properties of CM rocks …
Ecological Natural Restoration And Its Artificial Promotion Mode In Coal Mining Area,
2023
Central South Academy of Inventory and Planning of National Forestry and Grassland Administration, Changsha 410014, China
Ecological Natural Restoration And Its Artificial Promotion Mode In Coal Mining Area, Liu Wei, Yin Qinrui, Liu Xianghong
Coal Geology & Exploration
The natural ecological restoration is an important direction of the national ecological restoration policy. Taking limited artificial measures to promote the natural ecological restoration in coal mining areas is in line with the actual engineering requirements under the context of "double carbon" goal and thus has a better prospect in market application. Herein, the research results in terms of natural ecological restoration were sorted out systematically for the three main types of damaged land in the coal mining areas. Meanwhile, the concept connotation of artificial promotion of natural restoration was studied and analyzed. Besides, the governance mode by zone and …
Hydrochemical Characteristics And Source Analysis Of Mine Water In Shallow Coal Seams In Shaanxi And Inner Mongolia Contiguous Area,
2023
China Coal Research Institute, Beijing 100013, China; CCTEG Xi’an Research Institute Co., Ltd., Xi’an 710077, China; Shaanxi Key Laboratory of Prevention and Control Technology for Coal Mine Water Hazard, Xi’an 700077, China
Hydrochemical Characteristics And Source Analysis Of Mine Water In Shallow Coal Seams In Shaanxi And Inner Mongolia Contiguous Area, Wang Yutong, Wang Hao, Wang Tiantian, Xue Jiankun, Shang Hongbo, Zhou Zhenfang
Coal Geology & Exploration
In order to study the hydrochemical characteristics and sources of mine water under the mining of shallow coal seams in the contiguous area of Inner Mongolia and Shaanxi, the hydrochemical characteristics and the formation action of mine water in this area were investigated through the study of hydrochemical characteristics, mathematical statistics, ion ratio coefficient method and the hydrogen and oxygen isotopes in combination, by collecting samples of the mine water, groundwater in different aquifers and surface water in the study area. Based on this, the main sources of mine water in the study area were identified. The results show that …
Visco-Elastic Full-Waveform Inversion Based On Multi-Objective Function,
2023
Shaanxi Xiaobaodang Mining Co., Ltd, Shenmu 719399, China
Visco-Elastic Full-Waveform Inversion Based On Multi-Objective Function, Liang Xu, Ma Yue, Liu Chao, Chen Zhen, Jia Dongdong, Li Zhiyong, Pan Wenyong
Coal Geology & Exploration
Full-waveform inversion (FWI) is one of the core technologies developed in exploration geophysics. Through FWI, the subsurface velocity structures can be constructed and the attenuation parameter (the quality factor Q) model can be inverted, which is helpful to characterize the types and structures of subsurface media (such as the fluid and collapse column in collapse column). This is significant for the exploration and development of natural resources such as coal, oil and gas. Parameter crosstalk is the key difficulty of visco-elastic FWI. Due to the influences of velocity errors, the inverted Q models contain very strong crosstalk noise. To …
Design Of Multi-Channel Continuous Cable Duct For Double-Bit Self-Balancing Drilling System,
2023
College of Construction Engineering, Jilin University, Changchun 130061, China; Engineering Research Center of Geothermal Resources Development Technology and Equipment, Ministry of Education, Jilin University, Changchun 130061, China
Design Of Multi-Channel Continuous Cable Duct For Double-Bit Self-Balancing Drilling System, Zhao Yan, Ai Hongxin, Gao Ke, Zhang Congshan, Lyu Xiaoshu, Xie Xiaobo
Coal Geology & Exploration
The problems, such as low drilling efficiency, large disturbance to the hole wall and long assistance time of tripping caused by the “long arm jurisdiction” drive of the ground drilling rig to the underground drill bit, are faced during the drilling rescue of mine disaster. In order to solve these problems, the bionic self-balancing continuous cable duct drilling technology of double drill bit without drilling rig was proposed, the design of the multi-function continues cable duct is one of the key and challenging aspects of this technology. In terms of the technology, a multi-functional continuous cable duct with built-in channels …
A Preliminary Evaluation Method For Coal-Based Graphite,
2023
General Prospecting Research Institute of China National Administration of Coal Geology, Beijing 100039, China
A Preliminary Evaluation Method For Coal-Based Graphite, Liu Kang, Ning Shuzheng, Cao Daiyong, Wu Guoqiang, Wang Lu, Lin Zhongyue, Wang Anmin
Coal Geology & Exploration
Coal-based graphite is a type of strategic mineral resource and has unique advantages in the fields such as nuclear graphite and military aircraft tires. The evaluation of coal-based graphite is crucial to its exploration and development, upgrading and storage increase, and strategic resource security. Owing to the continuous transition between coal-based graphite and highly metamorphosed coals, some coal-based graphite tends to be wrongly treated as blind coal, and, accordingly, the identified resources of existing coal-based graphite may have been greatly underestimated. In fact, the resources of coal-based graphite are directly related to those of high-rank coals. Therefore, it is significant …
Study On Methane Adsorption/Desorption And Flow Law In The Nanopores Of Coal Based On Lammps,
2023
College of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China; Key Laboratory of Western Mine Exploitation and Hazard Prevention, Ministry of Education, Xi’an University of Science and Technology, Xi’an 710054, China
Study On Methane Adsorption/Desorption And Flow Law In The Nanopores Of Coal Based On Lammps, Shi Yu, Liu Yang, Xue Junhua, Li Shugang, Zhang Chao
Coal Geology & Exploration
In this work, the influence rules of driving force, pore size, temperature and pressure on methane adsorption/desorption and flow in coal nanopores were investigated by the molecular dynamic method based on Large-scale Atomic/Molecular Massively Parallel Simulator (LAMMPS). The investigation results show that the viscosity of methane gradually decreases with the increasing driving force, while its fluidity and flow velocity increase. Meanwhile, the absolute slip length decreases and the flow tends to the non-slip state. Generally, the adsorption density of methane is independent of the driving force, but greatly affected by the gas-solid action. Methane can be adsorbed on the pore …
Application Of Ecological Geological Layer Theory In Coal Seam Protection And Ecological Restoration—An Example Of Ecological Management Practice In Plateau Alpine Mining Areas,
2023
School of Earth Science and Engineering, North China University of Water Conservancy and Hydropower, Zhengzhou 450045, China
Application Of Ecological Geological Layer Theory In Coal Seam Protection And Ecological Restoration—An Example Of Ecological Management Practice In Plateau Alpine Mining Areas, Wang Qingwei, Xing Xiafan, Zou Mingjun, Guo Biao, Zhao Xin, Wang Tong
Coal Geology & Exploration
The ecological management of alpine permafrost area in plateau is a global problem, with few precedents for coal resource protection while ecological management. In this paper, the following results achieved in the ecological management in Muli area of Qinghai Province were understood in accordance with the idea of systematic engineering for the purpose of ecological environmental protection, with consideration to the protection of residual coal resources. Specifically, study was conducted on the ecological vulnerability of Muli mining area to damage and the difficulty of restoration under the control of natural climatic characteristics. Meanwhile, the characteristics of soil erosion and vegetation …
Processing Of Coal Mine Csamt Data With Wide Field Electromagnetic Method,
2023
Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring (Central South University), Ministry of Education, Changsha 410083, China; Hunan Nonferrous Resources and Geological Hazards Exploration Key Laboratory of Hunan Province, Changsha 410083, China
Processing Of Coal Mine Csamt Data With Wide Field Electromagnetic Method, Zhu Yunqi, Li Diquan, Liu Zuiliang, Zhang Xin
Coal Geology & Exploration
A CSAMT detection test was carried out for a coal mine with V8 multi-functional electrical instrument. Due to the serious electromagnetic interference within the area, the Cagniard apparent resistivity was low in quality. In order to improve the quality and utilization rate of data, authors attempted to process the CSAMT data collected by V8 with the wide field electromagnetic method, which used single-component method and ratio method (Electric field divided by magnetic field) to calculate apparent resistivity. The results showed that there was some deviation between the single-component wide field apparent resistivity and the actual terrestrial electricity because the emission …
Experimental Study On Heat Transfer Performance Of Double U-Shaped Buried Tube Heat Exchanger,
2023
China Coal Research Institute, Beijing 100013, China; China Coal Pingshuo Group Co., Ltd., Shuozhou 036006, China
Experimental Study On Heat Transfer Performance Of Double U-Shaped Buried Tube Heat Exchanger, Li Lei, Zhang Weidong, Xu Shuanhai, Zhao Yongzhe, Dang Dongsheng, Wang Qilong, Gou Li, Lei Yanzi
Coal Geology & Exploration
Double U-shaped buried tube heat exchanger (DUBTHE) are prone to pipe crossing and thermal short-circuiting in the practical applications, resulting in the reduced heat transfer performance and directly affecting the operational efficiency of shallow geothermal heat pump system. Based on the initial line thermal average temperature, thermal conductivity theory and slope method, and taking a shallow geothermal heat pump project in Xi'an as the engineering background. Then, this study investigate the effects of initial average temperature, thermal conductivity and volumetric heat capacity of rock-soil, and tube clamp spacing on the heat transfer performance of DUBTHE through field geotechnical thermal response …
Quality Assessment Of Resistivity Monitoring Data Of Coal Mines,
2023
CCTEG Xi’an Research Institute (Group) Co., Ltd., Xi’an 710077, China
Quality Assessment Of Resistivity Monitoring Data Of Coal Mines, Cui Weixiong, Yuan Bo
Coal Geology & Exploration
Resistivity monitoring of coal mines is an important technical means of preventing water hazards on the roof and floor of a mining face. However, it is difficult to guarantee high-quality resistivity data monitored and collected due to the complex and extremely strong electromagnetic interference in the monitoring environment, as well as the limitations of the maximum emission current for the purpose of safe coal mining. To select and utilize highly reliable data from the massive data monitored daily, this study compared and analyzed the advantages and disadvantages of commonly used methods for quality assessment of data obtained using the DC …
Key Technology Of Automatic Loading And Unloading System For Dual-Pipe Directional Drilling Rig And Its Application In Soft–Fragmentized Coal Seam,
2023
CCTEG Xi’an Research Institute (Group) Co., Ltd., Xi’an 710077, China; School of Civil, Mining and Environmental Engineering, University of Wollongong, NSW 2522, Australia
Key Technology Of Automatic Loading And Unloading System For Dual-Pipe Directional Drilling Rig And Its Application In Soft–Fragmentized Coal Seam, Li Kun, Ting Ren, Yao Yafeng
Coal Geology & Exploration
To improve the automatic level and efficiency of loading and unloading of drilling rigs during the construction of dual-pipe directional drilling, an automatic loading and unloading device of dual pipe was developed to realize the fully automatic loading and unloading of drilling rigs under different working conditions and to solve the technical problems of loading and unloading the drill pipes and casing simultaneously during the dual-pipe directional drilling. Meanwhile, the device structure and control system was designed to restrict the load applied to the device during construction with the end-compliant technique. Besides, the key boundary conditions of the control program …
Effects Of Mos2 On The Matrix Performance Of Hot-Pressed Fe-Based Diamond Drill Bit,
2023
School of Civil and Architectural Engineering, Liaoning University of Technology, Jinzhou 121001, China
Effects Of Mos2 On The Matrix Performance Of Hot-Pressed Fe-Based Diamond Drill Bit, Zhang Wenjiao, Tan Songcheng, Pan Bingsuo, Jin Xin, Kong Xiangqing, Long Shanglin
Coal Geology & Exploration
Diamond drill bit is a common rock breaking tool in various exploration works, but the diamond in drill bit has poor thermal stability. As heat is constantly generated during the drilling process, the self-cooling of diamond drill bit under the condition of drought and water shortage is very important to improve the drilling efficiency. In order to decrease the friction coefficient between bit matrix and rock interface under dry drilling condition and reduce the thermal damage of diamond during drilling, molybdenum disulfide (MoS2) was added into the Fe-based diamond bit matrix, and research was performed for the effects …
Study On Construction Of Microbial Solid-Free Drilling Fluid System And Its Borehole Wall Enhancement Mechanism,
2023
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China; College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, China
Study On Construction Of Microbial Solid-Free Drilling Fluid System And Its Borehole Wall Enhancement Mechanism, Li Zhijun, Zhu Mao, Zhi Jingzi, Han Yi, Chen Junxiu, Zhao Gan
Coal Geology & Exploration
Broken formations are often encountered during drilling, which is prone to the instability of wellbore wall and induces serious downhole accidents. Enhancing the cementing force between the broken blocks and improving the mechanical strength of the surrounding rocks of a wellbore is one of the effective ways to solve the instability of wellbore in this type of formation, for which the microbially induced calcite precipitation (MICP) technology provides a good reference. To this end, the growth of Bacillus pasteurii in the solid-free drilling fluid system was analyzed through experimental study, and thus a solid-free drilling fluid suitable for its growth …
Table Of Contents,
2023
China Coal Technology and Engineering Group (CCTEG)
Effect Of Amf-Maize Combination On Water And Salt Distribution In Soil Under The Dump Reconstruction Mode Of “Topsoil-Aquifer-Aquitard”,
2023
Institute of Ecological Environment Restoration in Mine Areas of West China, Xi’an University of Science and Technology, Xi’an 710054, China; College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China; State Key Laboratory for Coal Resources and Safe Mining, China University of Mining and Technology (Beijing), Beijing 100083, China
Effect Of Amf-Maize Combination On Water And Salt Distribution In Soil Under The Dump Reconstruction Mode Of “Topsoil-Aquifer-Aquitard”, Bi Yinli, Yang Wei, Ke Zengming, Wu Chao, Li Mingchao, Xue Chao
Coal Geology & Exploration
The distribution of soil water and salt severely affects the ecological reconstruction and plant configuration modes at coal mine dumps. To investigate the characteristics of soil water and salt distribution under the three-layer reconstruction mode of “topsoil-aquifer-aquitard” in coal mine dump under the influence of mycorrhizal plants, laboratory soil column test was conducted, in which the soil was treated in three ways: planting maize and inoculating with arbuscular mycorrhizal fungi (YM+AMF), planting maize (YM) only, and no planting of maize + no inoculation with bacteria (CK). The results showed that: (1) The different treatments have no significant effect on the …
Effects Of Actinomycetes On Root Growth Of Onobrychis Viciaefolia And Rhizosphere Soil Fertility In Dumping Site Of Open-Pit Mine In Arid Area,
2023
Key Laboratory of Northwest Water Resource, Environment and Ecology (Ministry of Education), Xi’an University of Architecture and Technology, Xi’an 710054, China
Effects Of Actinomycetes On Root Growth Of Onobrychis Viciaefolia And Rhizosphere Soil Fertility In Dumping Site Of Open-Pit Mine In Arid Area, Cao Shumiao, Wang Qiangmin, Yang Fan, Yang Jian, Zhang Haihan, Xu Ganggang, Zhu Shibin
Coal Geology & Exploration
In order to resolve the issue of soil degradation in the dumping site of open-pit coal mine in arid area, the effects of actinomycetes on the root growth and rhizosphere soil fertility of onobrychis viciaefolia in the dumping site of Xinjiang Heishan Open-pit Coal Mine were investigated by highly efficient actinomycete inoculation and in-situ pot experiment. The results show that: (1) Under the drought conditions, actinomycetes inoculation could significantly promote the development of root morphology and the growth of onobrychis viciaefolia. Compared with the control without actinomycetes inoculation, the total root length, average root diameter, root surface area and …
Outboard Onset Of Ross Orogen Magmatism And Subsequent Igneous And Metamorphic Cooling Linked To Slab Rollback During Late-Stage Gondwana Assembly,
2023
University of Wisconsin Oshkosh
Outboard Onset Of Ross Orogen Magmatism And Subsequent Igneous And Metamorphic Cooling Linked To Slab Rollback During Late-Stage Gondwana Assembly, Timothy Paulsen, John Encarnación, Anne Grunow, Jeffrey Benowitz, Paul Layer, Chad Deering, Jakub Sliwinski
Michigan Tech Publications, Part 1
Changes in magmatism and sedimentation along the late Neoproterozoic-early Paleozoic Ross orogenic belt in Antarctica have been linked to the cessation of convergence along the Mozambique belt during the assembly of East-West Gondwana. However, these interpretations are non-unique and are based, in part, on limited thermochronological data sets spread out along large sectors of the East Antarctic margin. We report new 40Ar/39Ar hornblende, muscovite, and biotite age data for plutonic (n = 13) and metasedimentary (n = 3) samples from the Shackleton–Liv Glacier sector of the Queen Maud Mountains in Antarctica. Cumulative 40Ar/39Ar age data show polymodal age peaks (510 …
Progress And Reflection Of Intelligent Geological Guarantee Technology In Coal Mining Face,
2023
China Coal Technology & Engineering Group Co., Ltd., Beijing 100013, China
Progress And Reflection Of Intelligent Geological Guarantee Technology In Coal Mining Face, Wang Guofa, Zhang Jianzhong, Xue Guohua, Liu Zaibin, Liu Qing, Li Mei, Liu Junfeng, Cheng Jian, Zhang Xueliang
Coal Geology & Exploration
Coal mine geological guarantee technology is the key path to achieve accurate and green coal mining. In view of the requirements of intelligent mining and geological guarantee, the main problems faced by the geological guarantee of the mining face were analyzed, mainly including the weak basic theoretical research, insufficient geological exploration accuracy, modeling accuracy unable to meet the engineering application, difficulties in model dynamic updating, and lack of optimal decision-making means for global path of intelligent mining based on spatio-temporal evolution. According to the faced difficulties and technical status, the author explored and practiced the geological guarantee technology of intelligent …
