{"title":"Effective extraction radius of gas drilling in coal seam","authors":"Zou Shichao, Xin Song","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.04.009","DOIUrl":null,"url":null,"abstract":"In order to predict effective extraction radius of drilling hole in gas control of coal mineꎬ taking No. 6 coal seam of Sijichun mine in Guizhou Province as an exampleꎬ a gas seepage model of surrounding units of boreholes was established. Thenꎬ gas pressure distribution cloud chart along radial direction at different drilling time was obtained through Comsol numerical simulation. Finallyꎬ effective extraction radius was determined based on theoretical derivation and numerical simulation data while considering critical gas pressure (0 5 MPa)ꎬ and verification was made with on ̄site test. The results show that relative error rate of theoretical and simulated effective extraction radius is less than 10%ꎬ verifying accuracy of both calculation results. Effective radius is linearly dependent on extraction time. Considering its complexity to measure effective radius on siteꎬ it can be obtained through theoretical and numerical simulation methods used in this paperꎬ which provides a theoretical basis for underground gas control.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"135 1","pages":"53"},"PeriodicalIF":0.0000,"publicationDate":"2021-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"中国安全科学学报","FirstCategoryId":"1089","ListUrlMain":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.04.009","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 5
Abstract
In order to predict effective extraction radius of drilling hole in gas control of coal mineꎬ taking No. 6 coal seam of Sijichun mine in Guizhou Province as an exampleꎬ a gas seepage model of surrounding units of boreholes was established. Thenꎬ gas pressure distribution cloud chart along radial direction at different drilling time was obtained through Comsol numerical simulation. Finallyꎬ effective extraction radius was determined based on theoretical derivation and numerical simulation data while considering critical gas pressure (0 5 MPa)ꎬ and verification was made with on ̄site test. The results show that relative error rate of theoretical and simulated effective extraction radius is less than 10%ꎬ verifying accuracy of both calculation results. Effective radius is linearly dependent on extraction time. Considering its complexity to measure effective radius on siteꎬ it can be obtained through theoretical and numerical simulation methods used in this paperꎬ which provides a theoretical basis for underground gas control.
期刊介绍：
China Safety Science Journal is administered by China Association for Science and Technology and sponsored by China Occupational Safety and Health Association (formerly China Society of Science and Technology for Labor Protection). It was first published on January 20, 1991 and was approved for public distribution at home and abroad.
China Safety Science Journal (CN 11-2865/X ISSN 1003-3033 CODEN ZAKXAM) is a monthly magazine, 12 issues a year, large 16 folo, the domestic price of each book is 40.00 yuan, the annual price is 480.00 yuan. Mailing code 82-454.
Honors:
Scopus database includes journals in the field of safety science of high-quality scientific journals classification catalog T1 level
National Chinese core journals China Science and technology core journals CSCD journals
The United States "Chemical Abstracts" search included the United States "Cambridge Scientific Abstracts: Materials Information" search included
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