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2019

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Articles 811 - 840 of 2225

Full-Text Articles in Engineering

Experimental And Theoretical Evaluation Of The Effect Of Panel Geometry On The Failure Of Corrugated Board Panel, Takashi Takayama, Katsuhiko Saito, Akira Higashiyama Jun 2019

Experimental And Theoretical Evaluation Of The Effect Of Panel Geometry On The Failure Of Corrugated Board Panel, Takashi Takayama, Katsuhiko Saito, Akira Higashiyama

Journal of Applied Packaging Research

McKee’s formula is widely used to predict the compression strength (CS) of corrugated boxes and panels. It can accurately estimate the compression strength of boxes that are within a practical size range, but recently, larger and smaller corrugated boxes than before have been extensively developed. Therefore, there is a need for a CS prediction formula that works beyond the application range of McKee’s formula. Recent researches consider the failure mode as a combination of collapsing and buckling failure and remove the constraints and the assumptions associated with McKee’s formula. This makes it possible to more accurately estimate the CS of …

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Simulation Of Seismic-While-Mining With Shearer As Source Of Fully Mechanized Mining Face, Jin Dan Jun 2019

Simulation Of Seismic-While-Mining With Shearer As Source Of Fully Mechanized Mining Face, Jin Dan

Coal Geology & Exploration

In order to analyze the wave field characteristics of seismic-while-mining data excited by coal cutter as seismic source, forward simulation was used to calculate seismic data. We transform the cutting mode of spiral drum and the stress of drum into the force function of seismic source, which is added to the wave equation in the form of load distribution at different time and location. Wave equation is solved by high-order staggered-style finite difference method. Finally, the seismic data obtained by numerical simulation show that shear wave energy is very strong and press wave energy is very weak in the wave …

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Quantitative Quality Evaluation Of Seismic-While-Mining Data, Qin Si, Cui Weixiong, Wang Wei Jun 2019

Quantitative Quality Evaluation Of Seismic-While-Mining Data, Qin Si, Cui Weixiong, Wang Wei

Coal Geology & Exploration

A seismic-while-mining(SWM) monitoring system laid in a working face of an underground coalmine will continuously generate tremendous amount of SWM data. When a coalmine cutting machine cuts coal seam actively, the SWM data will be of high correlation, and when it is not, the SWM data will be of low correlation or even no correlation at all. Based on this characteristic, a method for automatically and quantitatively evaluating the quality of SWM data was proposed. Using this method to process SWM data from a coal mine in Inner Mongolia, the result showed that this method can recognize the correlation peak …

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Study On Noise Attenuation Of Seismic While Mining, Liu Qiang Jun 2019

Study On Noise Attenuation Of Seismic While Mining, Liu Qiang

Coal Geology & Exploration

In view of the closure of the environments and the high requirements of safe production of underground coal mine, the explosive source has many limitations in the operation of seismic exploration of coal mine, and the coal shearer as the source can avoid many inherent shortcomings of the source of explosives, has the advantage of real-time detection of the internal structure and the stress of the working face without affecting the normal operation of the mining face. However, as the energy generated by the shearer is much smaller than that of the explosive source, the quality of the collected signal …

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Study On Sediment Environment And Rock Mechanics Characteristics Of The Delta Plain Of Jurassic Coalfield In Northern Shaanxi, Wang Haijun, Ma Liang Jun 2019

Study On Sediment Environment And Rock Mechanics Characteristics Of The Delta Plain Of Jurassic Coalfield In Northern Shaanxi, Wang Haijun, Ma Liang

Coal Geology & Exploration

Delta plain sedimentary environment is one of the coal-forming environments of the coal resources of Jurassic coalfield in northern Shaanxi. In order to get the rock mechanics parameters and characteristics of coal seam roof in different environments and to further investigate the relationship between the sedimentary environments and the rock mechanics characteristics, firstly from the analysis of the regional sedimentary environments, then by using techniques such as accurate core description, sedimentary structural analysis, facies analysis of geophysical logging, the microfacies were recognized, the sedimentary microfacies types of roof and their combination characteristics were classified. Later, rock samples of different lithology …

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Application Of Sec Dynamic Reserves Evaluation Method In Coalbed Methane Field: A Case From Hancheng Block In Ordos Basin, Yi Wei, Xiong Xianyue, Cao Yimin, Ding Rong Jun 2019

Application Of Sec Dynamic Reserves Evaluation Method In Coalbed Methane Field: A Case From Hancheng Block In Ordos Basin, Yi Wei, Xiong Xianyue, Cao Yimin, Ding Rong

Coal Geology & Exploration

At present, all the SEC reserves evaluation of coalbed methane fields uses dynamic assessment methods. In the process of evaluation, the parameters and calculation results are various. In order to solve this problem, this paper takes the Hancheng block in Ordos basin as an example, a series of evaluation methods adapted to the production characteristics of coalbed methane have been comprehensively applied, optimizing various parameters, and summarizing the law of decline. The results show that geological units are divided according to tectonic conditions, and on this basis, evaluation units are divided according to development effect, which can objectively and reasonably …

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Formation Mechanism Of Coal Seam Aquifer And Water Hazard Control Technology, Wang Hao Jun 2019

Formation Mechanism Of Coal Seam Aquifer And Water Hazard Control Technology, Wang Hao

Coal Geology & Exploration

Coal seams occur in Peat formation formed by sediments, often used as aquiclude or aquitard in coal production. However, in Barapukuria coal mine in Bangladesh, No.VI coal seam is rich in water, shows a typical hydrogeological phenomenon that the coal seam becomes an aquifer, which is rare in coal mining process both in China and abroad. From the formation mechanism of coal and the microstructure and tectonic development characteristics of coal, the structure of rich in water of coal was revealed. Based on MTS815 rock mechanics test system, the permeability of No.VI coal was tested, and the internal structure of …

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Occurrence Regularity Of Uppermost Minable Coal Seams And Their Harmful Level Of Mining In Yushen Mining Area, Li Zhixue, Shen Xiaolong, Li Mingpei, Wang Hongsheng Jun 2019

Occurrence Regularity Of Uppermost Minable Coal Seams And Their Harmful Level Of Mining In Yushen Mining Area, Li Zhixue, Shen Xiaolong, Li Mingpei, Wang Hongsheng

Coal Geology & Exploration

In order to study the occurrence regularity of uppermost mining coal seams and the damage degree of Salawusu Formation aquifer caused by mining in Yushen mining area, occurrence characteristics of the uppermost mining coal seams was analyzed, and spatial distribution law and combination of the uppermost mining coal seams overlying strata, the development law of the water flowing fractured zone based on the ratio of rock and loading thickness and mining height, and the damage degree of the Salawusu Formation aquifer caused by coal seam mining. The damage degree of the Salawusu Formation aquifer was divided into four kinds of …

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Water Yield Analysis Of Underground Drainage Boreholes On The Basis Of Logarithmic Normal Distribution, Ma Lianjing, Zhao Baofeng Jun 2019

Water Yield Analysis Of Underground Drainage Boreholes On The Basis Of Logarithmic Normal Distribution, Ma Lianjing, Zhao Baofeng

Coal Geology & Exploration

In order to analyze the distribution rule of water flow from underground drainage borehole in coal mines, histogram, Q-Q chart and nonparametric tests were used to test the logarithmic normal distribution model for water flow from underground drainage borehole in typical working face, and the nonlinear regression model was fitted. Combined with hydrogeological conditions, the parameters in the model were analyzed. The result shows that water flow from underground drainage boreholes in working face obeys the lognormal distritution. The logarithmic mean and standard deviation of water flow from drainage borehole of typical working face have a positive linear dependence relation …

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Reasonable Length Of Working Face 11-101 During Mining Above Confined Aquifer In Tuanbai Mine, Li Gang, Zhang Kai, Su Junhui, Wang Jinbo Jun 2019

Reasonable Length Of Working Face 11-101 During Mining Above Confined Aquifer In Tuanbai Mine, Li Gang, Zhang Kai, Su Junhui, Wang Jinbo

Coal Geology & Exploration

The working face 11-101 of Tuanbai coal mine in Huozhou, Shanxi Province is exploited above aquifer. In order to prevent floor water inrush accidents during mining, research combination of elasto-plastic theory, on-site measurement and numerical simulation was carried out to analyze the development rule of failure depth of the floor, then the reasonable length of the mining face under this condition was determined. The result shows that with the advancement of working face, the bottom plate of lagging working face is stretched and destroyed at about 6 m behind the lagging working face, and the bottom plate has a wedge …

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Development Of High Temperature Borehole Inclinometer, Qu Zhaogui, Gong Mingmao, Zhou Ce, Wang Guangzhai Jun 2019

Development Of High Temperature Borehole Inclinometer, Qu Zhaogui, Gong Mingmao, Zhou Ce, Wang Guangzhai

Coal Geology & Exploration

In the detection of high-temperature and high-pressure dry heat rock drilling location trajectory, the instrument has some problems, such as poor performance, poor stability, low measurement accuracy and large energy consumption. A set of high temperature borehole inclining device is designed to solve the problem of high temperature and high pressure measurement deviation and temperature measurement. Adopt high temperature resistant components, design control and measurement circuit. Automatic intermittent power supply is adopted to reduce heat dissipation and power consumption. The design of heat preservation pipe and pressure detection pipe is carried out by using ANSYS finite element software to conduct …

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Experimental Study On The Influence Of Well Inclination Angle Of Coalbed Methane Well On The Cementation Strength Of Cement-Formation Interface, Gu Jun, Li Linwei, Sun Dexing Jun 2019

Experimental Study On The Influence Of Well Inclination Angle Of Coalbed Methane Well On The Cementation Strength Of Cement-Formation Interface, Gu Jun, Li Linwei, Sun Dexing

Coal Geology & Exploration

In order to control the problem of water channeling in the process of coalbed methane(CBM) production, based on the self-designed test device and method, the test data of the shear strength at cement-aquiclude interface (CAI) is obtained under the conditions of well inclination of 0°, 30°, 60° and 90°. The mechanism of the influence of inclination angle on the shear strength at CAI is analyzed. The results show that the shear strength at CAI decreases with the increase of the inclination angle. The reason is that as the inclination angle increases, the upper part of the mud cake ring becomes …

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Application Of Wire Line Coring Technique In Overburden Drilling, Li Baijun, Zou Run, Guo Chao Jun 2019

Application Of Wire Line Coring Technique In Overburden Drilling, Li Baijun, Zou Run, Guo Chao

Coal Geology & Exploration

In order to improve the drilling efficiency of two oil and gas geological survey wells "Jitaodi 1" and "Ji Bai Di 1" in Baicheng area of Jilin Province, wireline coring technique was applied in overburden drilling. Based on the lithological characteristics of the drilled strata, combined with the technological characteristics of core extraction by lifting the drill pipe and wireline core extraction, by designing the bit, drilling flushing fluid and by improving drilling procedure parameters, drilling tool nozzle flow channel, the wireline coring drilling method has been successfully applied in drilling overburden strata(about 1 100 m thick). Compare with the …

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Geological Evaluation Model For Site Selection Of Underground Coal Gasification Without Well In Jinghai Coal-Bearing Area, Tianjin, China, Wang Zhigang, Fu Xiaojin, Liang Jie, Cao Jian, Jiang Shengguo Jun 2019

Geological Evaluation Model For Site Selection Of Underground Coal Gasification Without Well In Jinghai Coal-Bearing Area, Tianjin, China, Wang Zhigang, Fu Xiaojin, Liang Jie, Cao Jian, Jiang Shengguo

Coal Geology & Exploration

Based on the 4 factors such as exploration status, coal seam, coal quality and hydrological conditions, using the secondary fuzzy comprehensive evaluation method, the geological evaluation model without well was built. In order to verify the applicability of the model, the material balance by law of conservation of mass was carried out and the results compared with the test results of indoor model was got. This research suggests that the weight of geological conditions affecting underground coal gasification without well is exploration status > conditions of coal seam > hydrological conditions > coal quality, the area with comprehensive score higher than 70 is …

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Study On The Biodegradation Of Guanidine Gum By Methanogens In Coal Seam, Li Yunsong, Guo Hongyu, Fu Chaoyong, Zhao Guojun, Xia Daping Jun 2019

Study On The Biodegradation Of Guanidine Gum By Methanogens In Coal Seam, Li Yunsong, Guo Hongyu, Fu Chaoyong, Zhao Guojun, Xia Daping

Coal Geology & Exploration

The problem of low temperature breaking of guanidine gum fracturing fluid is related to the effect of coal seam penetration. In order to explore the effect of methanogenson the biodegradation of guanidine gum, Inner Mongolia some coal mine lignite were collected to prepare samples of coal samples, and the enriched fresh mine water was used as the bacteria source. The biological methane metabolism experiments of guanidine gum + coal were used to characterize the biodegradability of methanogens to guanidine gum, with the total gas production, CH4 concentration, guanidine gum molecular functional groups and C and H elements content changes. …

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Simulation And Test Of Enhancement Of Gas Drainage Through Co2 Injection Into Coal Seam Of Low Permeability, Bai Gang, Zhou Xihua, Wei Shiping, Fan Chaojun, Li Xueming Jun 2019

Simulation And Test Of Enhancement Of Gas Drainage Through Co2 Injection Into Coal Seam Of Low Permeability, Bai Gang, Zhou Xihua, Wei Shiping, Fan Chaojun, Li Xueming

Coal Geology & Exploration

In view of the difficulty of gas extraction and low drainage efficiency in coal seam of low permeability, based on multi component gas competitive adsorption of CO2-CH4, simulation and test for improving seam gas extraction rate through CO2 injecting CO2 into coal seam were carried out. A fluid-solid coupling model considering gas-water phases and Klinkenberg effect of CO2 injection into coal seam for enhancement of gas drainage was established, parameters of gas pressure, gas content and gas extraction rate after coal seam CO2 injection were analyzed by using COMSOL software and applied …

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Diffusion Ability Of Contaminants Of Coal Gangue Leachate In Geosynthetic Clay Liners, Dong Xingling, Dong Shuning, Zhou Zhenfang, Wang Qiangmin, Liu Ji Jun 2019

Diffusion Ability Of Contaminants Of Coal Gangue Leachate In Geosynthetic Clay Liners, Dong Xingling, Dong Shuning, Zhou Zhenfang, Wang Qiangmin, Liu Ji

Coal Geology & Exploration

To verify the feasibility of geosynthetic clay liners(GCL) as liners material for coal gangue impoundment, diffusion tests were conducted with vertical double reservoir method to determine the diffusion ability of heavy metals(Zn2+、Mn2+) and sulfate from coal gangue leachate in GCL-S(Sodium-activated bentonite), and POLLUTE V7 based on finite layer method was used to draw the fitting curve of pollutant changing with time in the diffusion device, which calculated the diffusion coefficient of contaminants in GCL. The data show that the diffusion coefficient in GCL was lower than that in compacted clay liners, so GCL could control the …

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Effect Of Clay Content On Shear Strength Of Loess, Wang Li, Li Xi'an, Hong Bo, Du Shaoshao, Zhang Hangbo, Zhao Ning Jun 2019

Effect Of Clay Content On Shear Strength Of Loess, Wang Li, Li Xi'an, Hong Bo, Du Shaoshao, Zhang Hangbo, Zhao Ning

Coal Geology & Exploration

The experimental research about effect of different clay content on shear strength of loess was carried out to reveal the influence of clay content on shear strength and its microscopic mechanism, and then a scientific basis for engineering practice of loess was provided. Self-made wet sieve device under negative pressure was applied to screen loess samples with different clay content. Different clay content of the loess samples were made to the same dry density, but with different moisture content using static pressure method, and then were taken direct shear test. The results show that with the increase of moisture content, …

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Detection Electric Field Control Strategy For Advanced Scanning Detection Of Focusing Multipoint Current Sources In Coal Mine Roadway, Liu Zhimin, Meng Cairu, Li Bing, Han Lei, Pan Yue Jun 2019

Detection Electric Field Control Strategy For Advanced Scanning Detection Of Focusing Multipoint Current Sources In Coal Mine Roadway, Liu Zhimin, Meng Cairu, Li Bing, Han Lei, Pan Yue

Coal Geology & Exploration

In order to realize the effective detection of electric field focusing depth and deflection angle scanning of focusing multipoint current sources in coal mine roadway, and accurately grasp its variation, according to the advanced scanning detection mechanism, Gauss theorem and two different methods were used to solve the integration process and derive the electric field line equation of a uniformly charged linear electrode with finite length. The electric field line equation of coplanar multi-electrode layout is induced and deduced through using its spatial distribution symmetry. By changing focusing shielding current ratio coefficient, this paper calculates the boundary line equation of …

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Electrocatalytic Nanomaterials For Reduction Of Hydrogen Peroxide As Potential Radioprotectors, Rui-Hong Jia, Jin-Xuan Zhang, Xiao-Dong Zhang, Mei-Xian Li Jun 2019

Electrocatalytic Nanomaterials For Reduction Of Hydrogen Peroxide As Potential Radioprotectors, Rui-Hong Jia, Jin-Xuan Zhang, Xiao-Dong Zhang, Mei-Xian Li

Journal of Electrochemistry

Nanomaterials have shown many potential application prospects in the biomedical field, such as medical imaging, drug delivery and biosensing due to their unique physical and chemical properties. In this review we focus on nanomaterials that have shown not only abilities of radiation protection, but also good electrocatalytic activities toward reduction reactions of hydrogen peroxide and oxygen. We discuss the abilities of radiation protection of these nanomaterials that are ascribed to their enzyme-like activities because their catalytic properties provide an effective pathway for scavenging free radicals in vivo via rapid reactions with reactive oxygen species. We also provide insights into electrocatalytic …

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The Development Of Seismic-While-Mining Detection Technology In Underground Coal Mines, Cheng Jianyuan, Qin Si, Lu Bin, Wang Baoli, Wang Ji Jun 2019

The Development Of Seismic-While-Mining Detection Technology In Underground Coal Mines, Cheng Jianyuan, Qin Si, Lu Bin, Wang Baoli, Wang Ji

Coal Geology & Exploration

The explosive source of underground seismic exploration in coal mines is greatly affected by the control of pyrotechnics and cannot realize the monitoring and early warning of dynamic geological disasters in coal mining. Seismic-while-mining(SWM) is a new technique based on shearer as a seismic source underground. The paper reviewed the research status of SWM technique at home and abroad, introduced the SWM's principle and its unique advantages. According to some pilot experiments of SWM, the results show that the shearer can be used as a seismic source because it has the character of strong excitation energy, wide frequency band, safety, …

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Development And Application Of Software In Seismic While Mining Data Processing, Wang Baoli Jun 2019

Development And Application Of Software In Seismic While Mining Data Processing, Wang Baoli

Coal Geology & Exploration

The seismic while mining detection technology with coal cutter as seismic source in coal face is the key to accurately know the geological conditions of mining, improve the detection accuracy of geological anomaly structure in coal face, and realize unmanned intelligent mining or with few people. It has broad application prospects.The conventional seismic data processing software can not meet the requirements of real-time, continuous and large data volume for seismic while mining data. By analyzing the requirement of seismic while mining detection technology for data processing software(SWM), a framework of hierarchical and multi-task data processing software is proposed. The components …

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Development Of Data Acquisition And Control Software For Seismic Monitoring With Mining, Duan Jianhua, Wang Yunhong, Wang Baoli Jun 2019

Development Of Data Acquisition And Control Software For Seismic Monitoring With Mining, Duan Jianhua, Wang Yunhong, Wang Baoli

Coal Geology & Exploration

Seismic monitoring with mining can continuously detect and real-time predict geological anomalies in front of work, it has become a research hotspot in recent years, but at present, there is no equipment that can carry out seismic monitoring with mining in coal mine.Therefore, the development of seismic monitoring equipment with mining has become a top priority. In order to solve this problem, based on the MFC development framework, a set of seismic monitoring data acquisition software is developed. A three-month joint survey was carried out indoors and outdoors, and a three-month comprehensive trial operation was carried out in Yanjiao Coal …

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Auxiliary Outburst Prevention Techniques By Surface Pre-Drainage For Coalbed Exposed In Tunnel And Mine Shaft, Zhang Dongliang Jun 2019

Auxiliary Outburst Prevention Techniques By Surface Pre-Drainage For Coalbed Exposed In Tunnel And Mine Shaft, Zhang Dongliang

Coal Geology & Exploration

How to expose an outburst-prone coal seam safely and efficiently in tunnel and mine shaft is always a subject to study continuously in outburst prevention, surface coalbed gas pre-drainage is an effective approaches for outburst prevention. Based on the analysis of outburst mechanism in tunnel and mine shaft and the core task of outburst prevention, the characteristics and adaptability of the outburst prevention techniques by surface pre-drainage are studied. Practical engineering application shows that the gas content and pressure in coal exposure area can be effectively reduced using surface pre-drainage well by cavern completion or hydraulic fracturing, the stress or …

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Experiment On Methane Displacement In Coalbed By Supercritical Carbon Dioxide, Wu Di, Liu Xueying, Sun Keming, Xin Liwei, Miao Feng Jun 2019

Experiment On Methane Displacement In Coalbed By Supercritical Carbon Dioxide, Wu Di, Liu Xueying, Sun Keming, Xin Liwei, Miao Feng

Coal Geology & Exploration

Using self-made experimental system, experiments were performed on coal samples to study supercritical CO2 seepage, adsorption and CH4 displacement by supercritical CO2. Experimental results show that permeability and adsorption of supercritical CO2 in coal increase with CO2 pressures. Pressures and temperatures of CO2 influence the values of displaced CH4. Values of displaced CH4 increase by average 0.076 cm3/g and sweep efficiency rises by 17%-23% with the CO2 pressure increasing from 8 MPa to 12 MPa, while displacement volume decreases linearly. With the temperature rising by 10℃, sweep …

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Prediction Of The Height Of Water Flowing Fractured Zone Under Subcritical Mining Based On Dimensional Analysis, Lou Gaozhong, Guo Wenbing, Gao Jinlong Jun 2019

Prediction Of The Height Of Water Flowing Fractured Zone Under Subcritical Mining Based On Dimensional Analysis, Lou Gaozhong, Guo Wenbing, Gao Jinlong

Coal Geology & Exploration

In order to accurately predict the height of water flowing fractured zone under subcritical mining, mining thickness M, mining depth H, inclined length of working face L, dip angle of coal seam α, overburden mechanical properties R, overburden structure characteristics S were selected as the main influencing factors on the height of water flowing fractured zone under subcritical mining. Dimensionless relations between the height of water flowing fractured zone and M, H, L, α, S were established by dimensional analysis. Based on 30 sets of measured data, the optimal function relation of dimensionless relation was …

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The Seepage Characteristics Of A Single Well Dewatering From An Unconfined Aquifer Bottom, Li Yang, Wang Wenxue, Xiao Hang, Sun Yi, Wang Yun, Di Mengna Jun 2019

The Seepage Characteristics Of A Single Well Dewatering From An Unconfined Aquifer Bottom, Li Yang, Wang Wenxue, Xiao Hang, Sun Yi, Wang Yun, Di Mengna

Coal Geology & Exploration

Dewatering from an aquifer bottom for drain and depressurization is one common method to ensure safety mining. This method is significantly different from pumping from the ground. In order to study the seepage characteristics of the dewatering hole(well), the seepage characteristics of a single well dewatering from an unconfined aquifer bottom was taken as an example and studied using numerical simulation method. The results show that when lw<lc, the pore water pressure above the dewatering well is greater than zero, which presents the rule of increasing first then decreasing from bottom to top, and the seepage …

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Development Of Automated Control Systems For Pilot-Scale Combustors In The New Byu Engineering Building Annex, Andrew Fry Jun 2019

Development Of Automated Control Systems For Pilot-Scale Combustors In The New Byu Engineering Building Annex, Andrew Fry

Journal of Undergraduate Research

The purpose of this MEG grant was to train 3 undergraduate students from either Chemical or Mechanical Engineering on the use of OPTO 22 control system and then to direct them, along with the input from engineers at OPTO 22, as they build and install a control system and logic for the Burner Flow Reactor (BFR), Multi Fuel Reactor (MFR) and the Pressurized Oxy Coal (POC) reactors in the new Engineering Research Laboratory (ERL). This program is comprised of 6 tasks as follows:

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The Matching Of Gas Production Curve Characteristic And Reservoir Conditions In Vertical Coalbed Methane Wells, Han Wenlong, Wang Yanbin, Liu Du, Chang Hong, Ding Tao Jun 2019

The Matching Of Gas Production Curve Characteristic And Reservoir Conditions In Vertical Coalbed Methane Wells, Han Wenlong, Wang Yanbin, Liu Du, Chang Hong, Ding Tao

Coal Geology & Exploration

The matching of coalbed methane(CBM) production curve type and geological conditions directly affects the gas production. Based on dividing gas production curves types of vertical CBM wells in the southern block of Shizhuang in Qinshui basin over 4 years, the characteristics of gas production curve were analyzed. The matching of gas production curve with reservoir parameters was further analyzed. The paper discovered and divided the gas production curve into four types:type of fast rising of single peak, type of stable rising of single peak, bimodal type of being low later and bimodal type of being high later. The original permeability, …

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Ga_Svm_Adaboost Model For Prediction Of Earthquake-Induced Sandy Soil Liquefaction, Mao Zhiyong, Huang Chunjuan, Lu Shichang Jun 2019

Ga_Svm_Adaboost Model For Prediction Of Earthquake-Induced Sandy Soil Liquefaction, Mao Zhiyong, Huang Chunjuan, Lu Shichang

Coal Geology & Exploration

In order to predict the liquefaction of sand, the seismic intensity, groundwater level, covering thickness, standard number, average particle size, landform, soil quality and inhomogeneity coefficient are selected as influencing factors. Genetic algorithm(GA) is used to optimize the parameters of support vector machine(SVM) by using correlation analysis and factor analysis model, and combining with Adaboost iterative algorithm, the GA_SVM_Adaboost model for predicting the liquefaction of sand is established. 329 sets of survey data of sandy liquefaction site in Tangshan earthquake were used to train the model, and 68 samples of sandy liquefaction data were predicted by using the good model. …

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