煤层瓦斯渗流过程中流固耦合问题的研究.pdf

太原理上人学硕士研究生学位论文 THE STUDY OF COUPLING SEEPAGE FLOW OF GAS ABSTRACT Coal—bed 2as is asorI of nature gas which 1ies incoal bed and appears inthe course offbfming —bed gas not only is a harm tosafety producIion ofmining,buI also makes alotofgiant as aburnt gas,coal-bed gas is a kind of valuable with the shortage of ene唱y,if coal—bed gas can beutilized,the good social effect and economic because plexity ofcoalseam consCruction and the1aw ofgas flow,gas ismainly discharged and has notrealized realeffeclive the use of thisenergy,the law ofgas now must berecognized intheory at first so as tosimulate actual coa】seam gas now situation and Jay the theoretical foundation ofthe exploitation ofcoal—bed gas inreality. InmV paper,the storage characteristic ofthecoalseam and mechanical properties ofgas—filled coalisintroduced firstly,as offers thebasis of thestudy ofphysical parameter and effective stress of coal and the foundation ofthemathematical model of fluid—solid coupling of coal·bed addition,this paper founds the relation of porosity, permeabil“y and swelling deformation under considering swelling deformation made by coal and analysis therelatiOn ofswelling stress and 3 太原理工大学硕十研究生学位论文 effective stress on thebasis ofabove analvsis, themathematical model offluid—solidcoupling gas is setup with the relation ofporosity,permeability and swelling deformation and therelation ofswelling stress and effective stress the program ofsimulation ofnuid—solid coupling ofcoal—bed gas and gas seepage isworked out by puter language ofC on theconditiOn oflaneway wall,and thesimulation results oftwo kinds ofmodels pared and analyzed. KEY WORDS:porosity,permeabilify,swelling deformation, swe¨ing sfress,coupled model 4 太原理工大学硕士研究生学位论文第一章绪论 ,即煤层气。它是在煤的形成过程中生成并赋存于煤层及煤系地层的~种天然气,主要成份是甲烷,其中还混杂有其它物质组分。我国是煤炭生产和消费大国,国有矿井中高瓦斯矿井占到了 44%,