Article(id=1149733268704116810, tenantId=1146029695717560320, journalId=1146031787341344770, issueId=1149733267617788430, articleNumber=1003-3033(2024)12-0149-10, orderNo=null, doi=10.16265/j.cnki.issn1003-3033.2024.12.0905, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1720713600000, receivedDateStr=2024-07-12, revisedDate=1726502400000, revisedDateStr=2024-09-17, acceptedDate=null, acceptedDateStr=null, onlineDate=1752047372270, onlineDateStr=2025-07-09, pubDate=1735315200000, pubDateStr=2024-12-28, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1752047372270, onlineIssueDateStr=2025-07-09, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1752047372270, creator=13701087609, updateTime=1752047372270, updator=13701087609, issue=Issue{id=1149733267617788430, tenantId=1146029695717560320, journalId=1146031787341344770, year='2024', volume='34', issue='12', pageStart='1', pageEnd='228', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1752047372010, creator=13701087609, updateTime=1756361981736, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1167830052499628941, tenantId=1146029695717560320, journalId=1146031787341344770, issueId=1149733267617788430, language=EN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1167830052499628942, tenantId=1146029695717560320, journalId=1146031787341344770, issueId=1149733267617788430, language=CN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=149, endPage=158, ext={EN=ArticleExt(id=1149733269337456721, articleId=1149733268704116810, tenantId=1146029695717560320, journalId=1146031787341344770, language=EN, title=Characteristics of coalbed gas seepage under asymmetric loading and optimization of extraction radius, columnId=1149733269173878863, journalTitle=China Safety Science Journal, columnName=Safety engineering technology, runingTitle=null, highlight=null, articleAbstract=
To reveal the influence of asymmetric load on gas seepage and extraction radius,a multi-physics coal and gas fluid-solid coupling model was proposed to analyze the gas seepage characteristics of coal seams. Matrix-adsorbed gas was used as the mass source in the proposed model introducing asymmetric loads into the boundary conditions. Furthermore,segmented drilling was used under asymmetric load conditions to optimize the gas extraction radius and improve extraction efficiency. The results indicated that greater stress compressed the cracks inside the concentrated stress zone,making it more difficult for gas to flow and to be extracted more challenging. The gas pressure in the concentrated stress zone decreased by approximately 2% less than that in the original stress zone,and the permeability decreased by about 9%. Asymmetric load had different degrees of influence on the diffusion and seepage processes. Within 180 days,the mass of diffused gas of the original stress area decreased by 19% and the seepage mass decreased by 20.5%,while these values in the concentrated stress zone decreased by 16.9% and 17.9%,respectively. Asymmetric loads had adverse effects on gas extraction,increasing extraction time under uniform load conditions. By adjusting the extraction radius under asymmetric load conditions,not only can the extraction efficiency be improved by approximately 3%,but it can also ensure that the extraction standards are met within 180 days,thereby effectively improving the overall performance of gas extraction.
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为了揭示非对称荷载对瓦斯渗流和抽采半径的影响特征,建立多物理场煤与瓦斯流固耦合模型,以研究煤层瓦斯渗流特性。该模型以基质吸附态瓦斯为质量源,将非对称荷载引入边界条件;同时,在非对称荷载环境下实施分段布孔,优化瓦斯抽采半径,提高抽采效率。结果表明:较大的应力压缩了集中应力区内部的裂隙,导致瓦斯更难流动,其内部的瓦斯更难被抽采。集中应力区的瓦斯压力下降幅度比原始应力区瓦斯压力下降幅度低2%左右,渗透率下降幅度低9%;同时非对称荷载下对扩散过程及渗流过程均产生不同程度的影响,在180天内,原始应力区扩散质量下降19%,渗流质量下降20.5%;集中应力区扩散质量下降16.9%,渗流质量下降17.9%;非对称荷载会对瓦斯抽采造成不利影响,使得在均布荷载条件下的抽采达标时间增加。通过调整非对称荷载环境下的抽采半径,不仅提高大约3%的抽采效率,还可以确保在180天内满足抽采标准,从而有效提升瓦斯抽采的整体性能。
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1 School of Safety and Emergency Management Engineering,Taiyuan University of Technology,Taiyuan Shanxi 030600,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1167743152946421929, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, authorId=1167743152803815590, language=CN, stringName=闫路, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1 太原理工大学 安全与应急管理工程学院,山西 太原 030600, bio={"img":"K9L+AdJjhu7xblbFOsTryg==","content":"
闫 路 (1999—),男,安徽宿州人,硕士研究生,研究方向为岩石力学、瓦斯灾害防治等。E-mail:yanlulu1201@163.com。
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闫 路 (1999—),男,安徽宿州人,硕士研究生,研究方向为岩石力学、瓦斯灾害防治等。E-mail:yanlulu1201@163.com。
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1 太原理工大学 安全与应急管理工程学院,山西 太原 030600, bio={"content":"
王连聪,教授。
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王连聪,教授。
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李文璞,副教授。
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30(1): 132-135., articleTitle=Experimental study on determining effective gas extraction radius by group pressure measurement, refAbstract=null)], funds=[Fund(id=1167743156599660771, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, awardId=52204105, language=CN, fundingSource=国家自然科学基金资助(52204105), fundOrder=null, country=null), Fund(id=1167743156654186724, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, awardId=51774182, language=CN, fundingSource=国家自然科学基金资助(51774182), fundOrder=null, country=null), Fund(id=1167743156729684197, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, awardId=202203021212229, language=CN, fundingSource=山西省基础研究计划项目(202203021212229), fundOrder=null, country=null), Fund(id=1167743156826153190, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, awardId=2024M751279, language=CN, fundingSource=中国博士后科学基金第75批面上项目资助(2024M751279), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1167743152627654815, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, xref=1, ext=[AuthorCompanyExt(id=1167743152636043424, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, companyId=1167743152627654815, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 School of Safety and Emergency Management Engineering,Taiyuan University of Technology,Taiyuan Shanxi 030600,China), AuthorCompanyExt(id=1167743152648626337, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, companyId=1167743152627654815, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 太原理工大学 安全与应急管理工程学院,山西 太原 030600)]), AuthorCompany(id=1167743152724123810, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, xref=2, ext=[AuthorCompanyExt(id=1167743152736706723, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, companyId=1167743152724123810, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2 煤矿安全技术国家重点实验室,辽宁 抚顺 113122)])], figs=[ArticleFig(id=1167743154729001163, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=EN, label=Fig.1, caption=
Geometric model of gas flow mechanism research scheme, figureFileSmall=klfEG9FghuIEaUcjQeEH0A==, figureFileBig=elO0Mf2U9Ei82xw80gMP4Q==, tableContent=null), ArticleFig(id=1167743154808692940, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=CN, label=图1, caption=
瓦斯流动机制研究方案几何模型, figureFileSmall=klfEG9FghuIEaUcjQeEH0A==, figureFileBig=elO0Mf2U9Ei82xw80gMP4Q==, tableContent=null), ArticleFig(id=1167743154871607501, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=EN, label=Fig.2, caption=
Geometric model of optimization research scheme for coal seam drilling spacing, figureFileSmall=0W+ZrvNH8Zz2qs4hA8Mrxw==, figureFileBig=hYzuZwHbPxUFBhVAfirzSA==, tableContent=null), ArticleFig(id=1167743154959687886, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=CN, label=图2, caption=
煤层钻孔间距优化研究方案几何模型, figureFileSmall=0W+ZrvNH8Zz2qs4hA8Mrxw==, figureFileBig=hYzuZwHbPxUFBhVAfirzSA==, tableContent=null), ArticleFig(id=1167743155026796751, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=EN, label=Fig.3, caption=
Gas extraction pressure distribution, figureFileSmall=k/nTnfncb6HSIcOQQFmAcw==, figureFileBig=NvOG0zWWWOciB6M7ShKv8w==, tableContent=null), ArticleFig(id=1167743155106488528, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=CN, label=图3, caption=
抽采瓦斯压力分布, figureFileSmall=k/nTnfncb6HSIcOQQFmAcw==, figureFileBig=NvOG0zWWWOciB6M7ShKv8w==, tableContent=null), ArticleFig(id=1167743155156820177, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=EN, label=Fig.4, caption=
Gas pressure distribution in fractures and matrix, figureFileSmall=x4z7/JGRTVBy8tkvpI8hKQ==, figureFileBig=QYp5UvQo2EybpHXMAmAcmw==, tableContent=null), ArticleFig(id=1167743155299426514, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=CN, label=图4, caption=
裂隙及基质瓦斯压力分布, figureFileSmall=x4z7/JGRTVBy8tkvpI8hKQ==, figureFileBig=QYp5UvQo2EybpHXMAmAcmw==, tableContent=null), ArticleFig(id=1167743155353952467, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=EN, label=Fig.5, caption=
Permeability cloud map, figureFileSmall=Orsus5ZRUlkQsaqRj+3J7w==, figureFileBig=KkFVyQlor73OO2UCOLKhnQ==, tableContent=null), ArticleFig(id=1167743155416867028, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=CN, label=图5, caption=
渗透率云图, figureFileSmall=Orsus5ZRUlkQsaqRj+3J7w==, figureFileBig=KkFVyQlor73OO2UCOLKhnQ==, tableContent=null), ArticleFig(id=1167743155534307541, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=EN, label=Fig.6, caption=
Permeability distribution of monitoring line AB, figureFileSmall=vUjdJZjq9DoxO07Qktv7AQ==, figureFileBig=iA4XjSCCBRhK+BBdn+9FHg==, tableContent=null), ArticleFig(id=1167743155593027798, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=CN, label=图6, caption=
监测线AB渗透率分布, figureFileSmall=vUjdJZjq9DoxO07Qktv7AQ==, figureFileBig=iA4XjSCCBRhK+BBdn+9FHg==, tableContent=null), ArticleFig(id=1167743155676913879, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=EN, label=Fig.7, caption=
Seepage and diffusion mass distribution at points A and B, figureFileSmall=u7GqosCUIGsIANC6tObfKA==, figureFileBig=NikvnBQ5nlV3ve/kKSYmug==, tableContent=null), ArticleFig(id=1167743155752411352, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=CN, label=图7, caption=
A、B两点渗流及扩散质量分布, figureFileSmall=u7GqosCUIGsIANC6tObfKA==, figureFileBig=NikvnBQ5nlV3ve/kKSYmug==, tableContent=null), ArticleFig(id=1167743155865657561, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=EN, label=Fig.8, caption=
Gas pressure distribution under different stresses, figureFileSmall=q3tJu1dt8TAvB9IvOWYY9g==, figureFileBig=BSWw5SmsBD86ItK1Dr29+g==, tableContent=null), ArticleFig(id=1167743155924377818, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=CN, label=图8, caption=
不同应力下瓦斯压力分布, figureFileSmall=q3tJu1dt8TAvB9IvOWYY9g==, figureFileBig=BSWw5SmsBD86ItK1Dr29+g==, tableContent=null), ArticleFig(id=1167743155978903771, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=EN, label=Fig.9, caption=
Pressure distribution under different conditions, figureFileSmall=o8+DneqaUfIqtMUxW2yKDQ==, figureFileBig=SkeB161lKcWdR9AkiBdDwQ==, tableContent=null), ArticleFig(id=1167743156125704412, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=CN, label=图9, caption=
不同情况下压力分布, figureFileSmall=o8+DneqaUfIqtMUxW2yKDQ==, figureFileBig=SkeB161lKcWdR9AkiBdDwQ==, tableContent=null), ArticleFig(id=1167743156176036061, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=EN, label=Fig.10, caption=
Comparison of gas extraction rates under asymmetric (unoptimized) and asymmetric loads (optimized), figureFileSmall=fWmYU6qtkEf7/D/Fu1JknQ==, figureFileBig=34noT2CEaRnQgG45VXupOw==, tableContent=null), ArticleFig(id=1167743156230562014, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=CN, label=图10, caption=
非对称荷载(无优化)、非对称荷载(优化)瓦斯抽采率对比, figureFileSmall=fWmYU6qtkEf7/D/Fu1JknQ==, figureFileBig=34noT2CEaRnQgG45VXupOw==, tableContent=null), ArticleFig(id=1167743156280893663, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=EN, label=Table 1, caption=
Parameters for numerical simulation
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数值 | 参数 | 数值 |
| | 0.012 | / (kg·m-3) | 1 450 |
| | 0.06 | 抽采负 压/ kPa | 87 |
| /mD | 0.01 | 吸附时 间/ d | 12 |
| Mc/(kg·mol-1) | 0.016 | 钻孔半 径/ m | 0.1 |
| R/(J·mol-1·K-1) | 8.413 5 | 煤的泊松比 | 0.339 |
| 煤层温度/K | 293 | 极限吸附 变形量 | 0.004 |
甲烷动力黏度/ (Pa·s) | 1.08 0-5 | K/ MPa | 2 713 |
| /MPa | 1 | / MPa | 8 139 |
| /MPa | 1 | / MPa | 7 |
| /(m3·kg-1) | 0.02 | / MPa | 12 |
标况甲烷摩尔 质量/(m3 ·mol-1) | 0.022 4 | / MPa | 5 |
), ArticleFig(id=1167743156348002528, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=CN, label=表1, caption=
数值模拟基本参数取值
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数值 | 参数 | 数值 |
| | 0.012 | / (kg·m-3) | 1 450 |
| | 0.06 | 抽采负 压/ kPa | 87 |
| /mD | 0.01 | 吸附时 间/ d | 12 |
| Mc/(kg·mol-1) | 0.016 | 钻孔半 径/ m | 0.1 |
| R/(J·mol-1·K-1) | 8.413 5 | 煤的泊松比 | 0.339 |
| 煤层温度/K | 293 | 极限吸附 变形量 | 0.004 |
甲烷动力黏度/ (Pa·s) | 1.08 0-5 | K/ MPa | 2 713 |
| /MPa | 1 | / MPa | 8 139 |
| /MPa | 1 | / MPa | 7 |
| /(m3·kg-1) | 0.02 | / MPa | 12 |
标况甲烷摩尔 质量/(m3 ·mol-1) | 0.022 4 | / MPa | 5 |
), ArticleFig(id=1167743156415111393, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=EN, label=Table 2, caption=
Comparison of simulations
, figureFileSmall=null, figureFileBig=null, tableContent=
| 类别 | 原始瓦斯量/ (kg·m-3) | 总瓦斯含量/ (kg·m-3) | 瓦斯扩散量/ (kg·m-3) | 瓦斯渗流量/ (kg·m-3) | 抽采率/ % |
| 无优化 | 1 501.6 | 1 041.8 | 34.014 | 6.63 | 30.62 |
| 优化后 | 1 501.6 | 994.8 | 31.66 8 | 6.150 6 | 33.75 |
), ArticleFig(id=1167743156469637346, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149733268704116810, language=CN, label=表2, caption=
模拟定量数值对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 类别 | 原始瓦斯量/ (kg·m-3) | 总瓦斯含量/ (kg·m-3) | 瓦斯扩散量/ (kg·m-3) | 瓦斯渗流量/ (kg·m-3) | 抽采率/ % |
| 无优化 | 1 501.6 | 1 041.8 | 34.014 | 6.63 | 30.62 |
| 优化后 | 1 501.6 | 994.8 | 31.66 8 | 6.150 6 | 33.75 |
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