Model Of Gas-Bearing Coal Permeability Prediction Based On Apso-Wls-Svm,
2019
System Engineering Institute, Liaoning Technical University, Huludao 125105, China
Model Of Gas-Bearing Coal Permeability Prediction Based On Apso-Wls-Svm, Mao Zhiyong, Huang Chunjuan, Lu Shichang, Han Rongyue
Coal Geology & Exploration
In order to predict gas-bearing coal permeability accurately and prevent gas accidents effectively, a weighted least square support vector machine(WLS-SVM) algorithm based on Adaptive Particle Swarm Optimization(APSO) is proposed. Based on the related theory and literature research on gas-bearing coal permeability, the effective stress, gas pressure, temperature and compressive strength were selected as the main characteristic indexes. The APSO algorithm was used to optimize the combination parameters(C, σ) of the WLS-SVM model and APSO-WLS-SVM gas-bearing coal permeability prediction model was established. According to the field data, 40 sets of data were used as training samples and the remaining …
Study On Development Height Of Permeable Fractured Zone Based On Overburden Failure Transfer,
2019
School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China
Study On Development Height Of Permeable Fractured Zone Based On Overburden Failure Transfer, Zhao Gaobo, Guo Wenbing, Lou Gaozhong, Ma Zhibao
Coal Geology & Exploration
It is extremely significant for coal mining under water bodies and water conservation mining to research overburden failure and the height of permeable fractured zone. The processes of overburden failure transfer were analyzed, which could be divided into transmission development stage and transmission termination stage. Through theoretical analysis, mechanical model of strata suspended integrity and overhanging stability were established. The limited suspension distance and overhang distance of each stratum were proposed to judge the damage of each layer. A new theoretical method to predict the development height of permeable fractured zone was put forward. The project example was compared with …
Design Of Parameter Monitoring Software For Full Hydraulic Drilling Rig Based On Embedded Technology,
2019
Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China
Design Of Parameter Monitoring Software For Full Hydraulic Drilling Rig Based On Embedded Technology, Liao Jiangnan, Jiang Nan, Song Haitao, Dong Hongbo, Ma Bin
Coal Geology & Exploration
In order to reduce the development cost of the coal mine hydraulic drilling rig monitoring and diagnosis system, realize the versatility and portability of the monitoring and diagnosis system, and simplify the operation process, an embedded parameter monitoring software for the domestic mainstream full hydraulic drilling rig was designed. The software took STM32F407 microprocessor as the running environment and was developed in the environment of Visual Studio 2013 with C language. After completing GUI simulation on emWin Simulation, the software function verification experiment was carried out on the ZDY4000LR drilling rig. The experiment shows that the software ran stably and …
Data Modeling And Analysis Of Coal Resources Based On 3dmine Software,
2019
School of Earth Science and Resources, China University of Geosciences(Beijing), Beijing 100083, China
Data Modeling And Analysis Of Coal Resources Based On 3dmine Software, Liu Xiaoning, Luo Jinhui, Ma Xiaoli, Dong Zhibo
Coal Geology & Exploration
Taking No.3 coal in Gucheng coal mine, Shandong Province as the target, 3D coal seam entity models were built in 3DMine software, coaly quality indices' distributions were analyzed and coal reserve was calculated and compared to the reserve estimation in method of geological block. Firstly, a boreholes database is established using the geological data and borehole data of the target, and a 3D surface model of the coal seam with faults embedded was constructed. Then, the surface model was interpolated into an entity blocks model through the algorithm of inverse distance weighted(IDW) interpolation. Finally, the recoverable coal reserve of the …
Characteristics Of Height Of Water Flowing Fractured Zone Caused During Ful-Ly-Mechanized Caving Mining In Huanglong Coalfield,
2019
China Coal Research Institute, Beijing 100013, China; Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China; Shaanxi Key Laboratory of Prevention and Control Technology for Coal Mine Water Hazard, Xi'an 710077, China
Characteristics Of Height Of Water Flowing Fractured Zone Caused During Ful-Ly-Mechanized Caving Mining In Huanglong Coalfield, Li Chaofeng
Coal Geology & Exploration
In order to study the law of height of water flowing fractured zone caused by fully-mechanized caving mining in Huanglong coalfield, this paper has systematically collected the measured data in the region, and methods of mathematical statistics and regression analysis were used to study the relationship among the height of water flowing fractured zone, width of working face, depth of coal seam and height of coal mining. The results show that:When the width of working face was less than 240 m and the height of coal mining was 8.5 to 9.5 m, the height of water flowing fractured zone under …
Research On Collapsibility Of A Loess Site In Pakistan,
2019
Institute of Geotechnical Engineering, Xi'an University of Technology, Xi'an 710048, China
Research On Collapsibility Of A Loess Site In Pakistan, Liu Chunlong, Zhang Zhiqiang, Liu Fengyin, Liu Naifei, Sun Hongchao, Lyu Wenjun
Coal Geology & Exploration
The loess of an area in Pakistan is the Quaternary Holocene alluvium. The study and existing geological data in this area are relatively few, and special research is needed. In order to determine the distribution and collapsibility of the lo-ess, based on the construction distribution of the loess site, undisturbed soil sample was selected at the typical location. The unconfined compression strength tests and compressive tests were carried out. The structural characteristics of loess were quantitatively described by structural index. The self-weight collapsible coefficient and collapsible coefficient of loess were determined, the self-weight settlement and the total settlement were calculated …
Method For Determination Of Measurent Time Of Resistivity Logging In Artificial Well Liquid,
2019
Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China; Department of Geology, Northwest University, Xi'an 710069, China; State Key Laboratory of Continental Dynamics, Northwest University, Xi'an 710069, China
Method For Determination Of Measurent Time Of Resistivity Logging In Artificial Well Liquid, Wang Haijun, Ma Liang
Coal Geology & Exploration
In order to solve the problem of determining the most critical parameter of the logging time of artificial well fluid resistivity logging, and get rid of the method that depends on the construction experience for a long time, guide logging technicians to obtain reliable logging curves, from the factors influencing the measurement time, the mass conservation law was used to build the calculation model for the best measurement time of logging, the computational formula for the best measurement time was derived, which was verified through in-site contrast experiment of boreholes. The results show that the computational formula set up by …
Table Of Contents,
2019
China Coal Technology and Engineering Group (CCTEG)
Technology And Method Of Cbm Concurrent Exploration During Coal Resources Exploration,
2019
School of Resources and Geoscience, China University of Mining and Technology, Xuzhou 221116, China; Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process of the Ministry of Education, China University of Mining & Technology, Xuzhou 221008, China; Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Land and Resources, Xi'an 710021, China
Technology And Method Of Cbm Concurrent Exploration During Coal Resources Exploration, Lin Yabing, Qin Yong, Duan Zhonghui, Ma Dongmin
Coal Geology & Exploration
The coal seam serves as a geological carrier for CBM, and exploration of CBM and coal resources is a man-datory requirement for the management of national mineral resources. Based on the practice of project exploration in recent years, it analyzed the evaluation criteria of CBM resources in the process of coal resources exploration. On this basis, the exploration ideas, exploration methods, tasks, report preparations have proposed a method system for CBM in the ex-ploration of coal resources. According to the particularity of CBM exploration work methods, CBM seismic, well logging, drilling, well log, gas drainage, and engineering quality acceptance methods …
Trajectory Design Of Oblique Section In Nearly Horizontal Directional Hole In Inclined Formation In Underground Coal Mine,
2019
Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China
Trajectory Design Of Oblique Section In Nearly Horizontal Directional Hole In Inclined Formation In Underground Coal Mine, Zhang Yingjie, Zhao Yongzhe, Yang Zhong, Mo Haitao
Coal Geology & Exploration
Trajectory design of the near-horizontal directional drilling technology in underground coal mine is one of key aspects to successfully implement the technology. The trajectory of hole in a nearly horizontal formation is designed generally by two-dimensional method, and this method usually leads to the problem that the deflecting section of the hole travels out of the inclined target formation.Therefor, the calculation methods of the drilled formation true thickness were studied in the paper, the method using the unit normal vector of formation was proposed, and computation table in Excel was developed to guide trajectory design of near-horizontal directional drilling. The …
Experimental Of Water Unlocking Stimulation Mechanism On Surfactant Fracturing Fluid,
2019
School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China; Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region, Henan Province, Jiaozuo 454000, China
Experimental Of Water Unlocking Stimulation Mechanism On Surfactant Fracturing Fluid, Song Jinxing, Yu Shiyao, Su Xianbo, Wang Qian
Coal Geology & Exploration
This paper presents an experimental study of water unlocking stimulation mechanism on surfactant fracturing fluid based on the measurements of surface tension, contact angle, gas-phase permeabilities and desorption of nitrogen on synthetic coal samples. The coking coal in Liulin zone of Hedong coal field was used as testing object in this study. Active water and surfactant fracturing fluids were used as testing liquids in this study. Results show that the surfactant fracturing fluid(1.5%KCl+0.05%AN) reduces the surface tension of active water fracturing fluid(1.5%KCl) and increases the wettabil-ity of active water fracturing fluid to coal reservoir; the surfactant fracturing fluid reduces the …
The Characteristics Of Organic Matter In Coal-Measure Source Rocks And Coal-Measure Gas Resource Potential In Eastern Henan Province,
2019
School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China
The Characteristics Of Organic Matter In Coal-Measure Source Rocks And Coal-Measure Gas Resource Potential In Eastern Henan Province, Yang Yanqing, Zhang Xiaodong, Xu Yakun, Zhang Peng, Wang Kun, Zhu Chunhui
Coal Geology & Exploration
In order to evaluate the hydrocarbon generation potential of coal-measure source rocks in eastern Henan Province, based on the measurement results of organic carbon content, vitrinite reflectance and the identification of maceral and type of kerogen in source rocks, the organic geochemical characteristics and the resource potential of coal-measure gas in different blocks of eastern Henan Province were comprehensively analyzed, and favorable blocks for coal-measure gas exploration were designated. The results show that the organic carbon mass fraction of coal-measure source rocks presents low as a whole(less than 1.5%). Kerogen in coal-measures source rocks is mainly of type Ⅲ and …
Analysis Of Water Abundance Characteristics Of Sandstone Aquifer In Luohe Formation On The Basis Of Arcgis,
2019
College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China
Analysis Of Water Abundance Characteristics Of Sandstone Aquifer In Luohe Formation On The Basis Of Arcgis, Hou Enke, Long Tianwen, Liu Qingli, Wang Fei, Fan Zhigang
Coal Geology & Exploration
Aquifer water abundance evaluation is the prerequisite for coalmine water inflow prediction and water disaster prevention. Luohe aquifer is the roof of No.4 coal seam on panel 41 in Wenjiapo mine. Six main controlling factors of Luohe aquifer chosen to assess coal water abundance are aquifer thickness, porosity, moisture content, washing liquid consumption and apparent resistivity of upper and lower Luohe Formation. Analytic hierarchy process(AHP) has been used to determine the weight of each control factor. Based on ArcGIS numerical visualization platform, the vector maps of factors are normalized and superimposed, and then water abundance evaluation model of aquifer based …
Fuzzy Random Optimization Of Generalized Kelvin Constitutive Model For Creep Of Artificial Freezing Clay,
2019
Post-doctoral Research Station of Safety Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China; School of Architectual Engineering, Nantong Vocational College, Nantong 226001, China
Fuzzy Random Optimization Of Generalized Kelvin Constitutive Model For Creep Of Artificial Freezing Clay, Yao Yafeng, Cheng Hua, Rong Chuanxin, Zhang Nan, Lin Jian
Coal Geology & Exploration
The constitutive model of freezing creep is one of the important reference data for shaft building using freezing method. Uniaxial creep tests under different stress levels were conducted for the artificial freezing clay at -5℃, -10℃, -15℃ and -20℃. So the changing rules of creep curves were obtained under the condition of different temperatures and different stress levels. On this basis, traditional Guess-Newton algorithm has been improved by fuzzy random iterative search and the of the fuzzy random Guess-Newton algorithm steps were obtained, then we use the improved algorithm to optimize the parameters of the generalized Kelvin constructive model, obtained …
Clgis Logging Data Format Conversion,
2019
Key Laboratory of Exploration Technologies for Oil and Gas Resources of Education Ministry of Yangtze University, Wuhan 430100, China; College of Geophysics and Petroleum Resources, Yangtze University, Wuhan 430100, China
Clgis Logging Data Format Conversion, Lin Jiamin, Zhang Gong
Coal Geology & Exploration
In order to solve the problem of DAT log data format conversion, well logging data of CLGIS(Coalfield Logging Geology Interpretation System) is analyzed in detail. On the basis of analysis of the data storage format, format conversion program is written. The program can accurately convert the DAT format data to LAS format data promptly. The LAS format data can be loaded into the commonly used well logging software in oil field easily. With the help of powerful software, the drawing efficiency and quality of coalfield well logging is greatly improved.
Mechanical Characteristics And Test Of Rotary Drilling Of Pdc Anchor Bit,
2019
Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China
Mechanical Characteristics And Test Of Rotary Drilling Of Pdc Anchor Bit, Zhang Youzhen, Zhang Ning, Zhang Xianzhen
Coal Geology & Exploration
For the construction requirements of the fast and accurate drilling of anchor hole in a coal roadway, the main mechanical factors are analyzed in theory through the establishment of PDC anchor bit rotary drilling mechanics model. The results show that the axial force of the PDC cutting tooth increases with the increase of the penetration depth, and shows the trend of first decreasing and then increasing with the increase of the cutting angle. When the friction coefficient of the coal-bearing strata is 0.20 to 0.43, the optimum cutting angle is from 15.0° to 18.3°, and the axial force and the …
Progress In The Research On Drilling Technology And Equipment In Coal Mining Areas Of China,
2019
Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China
Progress In The Research On Drilling Technology And Equipment In Coal Mining Areas Of China, Li Quanxin, Shi Zhijun, Tian Hongliang, Yao Ke, Liu Jianlin, Yao Yafeng, Xu Chao, Fang Jun, Liu Fei
Coal Geology & Exploration
Drilling technology and equipment play a key role in coalbed methane(gas) development and ensuring coal mine safe production in coal mining areas. The complicated geological and mining conditions of coal seams in China determine that the drilling technology and equipment must be based on the basic situation of coal mining areas and take the way of independent innovation. The representative achievements of drilling technology and equipment in coal mining area during the Eleventh Five-Year Plan and the Twelfth Five-Year Plan were systematically summarized in this paper. Additionally, it presents comprehensive introduction to the great achievements of surface drilling and underground …
Research On Key Technology Of The 15 000 N·M High-Power Directional Drilling Rig,
2019
Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China
Research On Key Technology Of The 15 000 N·M High-Power Directional Drilling Rig, Fang Peng
Coal Geology & Exploration
According to the actual demand for ultra-long distance directional drilling in coal seam and large diameter directional drilling in seam roof, and the function of compound directional drilling technology for drilling rig, the technical idea of modular development for the functional development and design of high-power directional drilling rig are put forward. Combined with the contradiction among high-power matching, large capacity output and compact layout design of drilling rig, the key technologies of 15 000 N·m high-power directional drilling rig are researched in this paper, including overall layout design, large capacity rotary head design and layer board analysis, large opening …
Design Of Remote Control System Of Drilling Rig In Coal Mines,
2019
Xi'an Research Institute Co. Ltd., China Technology and Engineering Group Corp., Xi'an 710077, China; School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Design Of Remote Control System Of Drilling Rig In Coal Mines, Weng Yinsheng, Wu Di, Lu Feifei, Wang Longpeng
Coal Geology & Exploration
In order to solve the influence of the dangerous conditions in the deep mine, such as large percus-sive ground pressure and high temperature and humidity of the roadways in deep mines on drilling operation, a remote control drilling rig control system is designed. The control system consists of local control terminal and remote control terminal, both communicating by CAN(Controller Area Network) bus and optical fiber for data and image. Local control terminal core uses automobile PLC(Programmable Logic Controller) as the control core to realize data acquisition and control, develops program in CoDeSys. The remote control terminal, based on MCU and …
Hole-Bottom Hydraulic Pressurization Technology For Directional Drilling In Hard Rock In Underground Coal Mines,
2019
Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China
Hole-Bottom Hydraulic Pressurization Technology For Directional Drilling In Hard Rock In Underground Coal Mines, Xu Baolong, Yao Ningping, Wang Li, Cao Jing, Dou Xuqian
Coal Geology & Exploration
In order to solve the problem of large feeding pressure, low drilling efficiency and limited hole depth caused by the backing effect of drill string during directional drilling of deep hole in underground coal mines, a technical idea of using hydraulic tool to increase WOB was proposed. The structural design of the hydraulic pressurizer at the bottom of the hole was carried out by drawing on the structure of the hydraulic pressurizer in the field of oil drilling and combining the nearly horizontal drilling conditions in underground coal mines. The hydraulic parameters were designed by the theoretical calculation and the …
