煤与瓦斯的热流固耦合关系研究现状及展望  

State-of-the-art review and prospect of thermo-hydro-mechanical coupling relation between coal and gas

作　　者：郝建峰[1] 梁冰[2] 孙维吉[2] 石占山 施永威 赵航[2] HAO Jianfeng;LIANG Bing;SUN Weiji;SHI Zhanshan;SHI Yongwei;ZHAO Hang(College of Mining,Liaoning Technical University,Fuxin,Liaoningg123000,China;School of Mechanics&Engineering,Liaoning Technical University,Fuxin,Liaoningg123000,China;Research Institute of Technology and Equipment for the Exploitation and Utilization of Mineral Resources,Fuxin,Liaoning 123000,China;CCTEG Chongqing Research Institute,Chongqing 400037,China)

机构地区：[1]辽宁工程技术大学矿业学院,辽宁阜新123000 [2]辽宁工程技术大学力学与工程学院,辽宁阜新123000 [3]辽宁工程技术大学矿产资源开发利用技术及装备研究院,辽宁阜新123000 [4]中煤科工集团重庆研究院有限公司,重庆400037

出　　处：《采矿与安全工程学报》2022年第5期1051-1060,1070,共11页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金面上项目(51874166);国家自然科学基金青年基金项目(52004118);国家重点研发计划项目(2016YFC0801404);辽宁工程技术大学学科创新团队资助项目(LNTU20TD-11,LNTU20TD-05)。

摘　　要：为揭示煤与瓦斯的热流固交叉耦合关系,采用文献调研和理论分析的方法,探讨了含瓦斯煤应力场、渗流场和温度场的相互作用关系,阐明了各耦合项中蕴含的耦合关系,建立了煤层变形-瓦斯渗流-温度变化耦合作用模式,分析了煤与瓦斯热流固耦合作用的研究进展、存在的问题及后续研究方向,在现有耦合关系基础上增加了应力作用下的瓦斯吸附/解吸特征以及不同地质条件和开采条件下的解吸热效应特征,完善了煤与瓦斯热流固耦合关系。研究结果表明:已有的一些耦合关系存在方程形式不统一、普适性较弱等特点,且尚有一些耦合关系没有建立合适的方程,应力场和渗流场的耦合作用中缺少应力作用下的瓦斯吸附/解吸特征;解吸热源方程和吸附瓦斯量方程的适用条件、准确性及各种形式的方程存在的差异有待进一步研究;温度作用下的煤体物理力学参数变化方程普适性较弱,只能说明特定条件下温度场和应力场的耦合作用;已建立的热流固耦合模型中忽略了表示热能与应变能之间相互转化的耦合关系。对后续研究提出了几点建议:耦合机理研究方面,建议对应力作用下煤层瓦斯的吸附/解吸特征进行研究;建议对特殊的地质构造和开采条件下煤层中不同位置处的解吸热效应、变形能和摩擦热的演化特征等开展现场监测、实验室实验和数值模拟研究工作;建议对温度场、渗流场、应力场之间耦合影响的大小进行研究;在解耦计算方面,应开发大型的国产计算软件。研究成果对于完善煤与瓦斯热流固耦合理论和预防煤与瓦斯突出具有重要的理论和实际意义。To understand the thermo-hydro-mechanical cross-coupling relation between coal and gas,a state-of-the-art review and theoretical analysis were conducted in this paper to explore the interaction relationship between the stress field,seepage field and temperature field of gas-containing coal,and further clarify the coupling relation contained in each coupling item.A coupling model of coal seam deformation-gas seepage-temperature change was established,and the research progress,existing problems and follow-up research directions of the thermo-hydro-mechanical coupling of coal and gas were analyzed.Based on the existing coupling relation,the characteristics of gas adsorption/desorption under stress and the characteristics of desorption thermal effect under different geological conditions and mining conditions were also considered,which better demonstrated the coupling mechanism of coal and gas.The research results show that some existing coupling relations have the characteristics of inconsistent equation form and poor universality,and there are still some coupling relations that have not been established.The coupling effect of the stress field on the seepage field lacks the characteristics of gas adsorption/desorption under stress.Further study is needed on the applicable conditions,accuracy and the differences in various forms of equations of the desorption heat source equation and the adsorption gas quantity equation.A poor generality is presented for the equation of coal physical and mechanical parameters change under the effect of temperature,which can only explain the coupling effect of the temperature field on the stress field under certain conditions.The established thermo-hydro-mechanical coupling model neglects the coupling relation between thermal energy and strain energy.Several suggestions are made for further research:For the coupling mechanism research,it is suggested to study the adsorption/desorption characteristics of gas under stress.On-site monitoring,laboratory experiments and numerical simulatio

关 键 词：煤与瓦斯 煤体变形 热流固 耦合关系 解吸热效应 

分 类 号：TD713[矿业工程—矿井通风与安全]