顶板岩性对煤炭地下气化覆岩移动规律的影响  

Influence of Roof Lithology on Overburden Movement Law of Underground Coal Gasification

作　　者：郑慧慧 李慧 朱增武 ZHENG Hui-hui;LI Hui;ZHU Zeng-wu(College of Architectural Engineering,Shangqiu Normal University,Shangqiu Henan 476000,China;Construction Department,Shangqiu Normal University,Shangqiu Henan 476000,China;Zhejiang Jiangnan Project Management Co.,Ltd,Hangzhou 310000,China)

机构地区：[1]商丘师范学院建筑工程学院,河南商丘476000 [2]商丘师范学院基建处,河南商丘476000 [3]浙江江南工程管理股份有限公司,杭州310000

出　　处：《淮阴工学院学报》2023年第1期64-69,共6页Journal of Huaiyin Institute of Technology

基　　金：河南省高等学校重点科研项目(22B440005)。

摘　　要：为了研究顶板岩性对煤炭地下气化过程中覆岩移动规律的影响,运用大型有限元软件,采用热固耦合数学模型,在前人对岩石热力学物理参数研究的基础上,对煤炭地下气化的整个过程进行了数值模拟,得出了煤炭地下气化后围岩温度场和塑性区分布图、燃空区顶板及工作面前方顶板垂直位移图。结果表明:直接顶岩性不同对基本顶稳定有很大影响,直接顶岩层越硬,基本顶越稳定,随着直接顶岩性硬度的增强,顶板岩层的位移呈现一阶指数衰减函数变化规律;顶板岩层燃空区的位移呈盆状,相对中线对称分布且随着工作面推进顶板位移量呈指数增大。In order to study the influence of roof rock lithology on the movement law of overburden in the process of underground coal gasification,this paper uses large-scale finite element software,adopts thermal solid coupling mathematical model,and carries out numerical simulation of the whole process of underground coal gasification on the basis of previous studies on rock thermodynamic and physical parameters,and obtains the distribution map of surrounding rock temperature field and plastic zone after underground coal gasification Vertical displacement diagram of the top plate of the fuel air area and the top plate in front of the work.Through the research,it is found that the different lithology of the direct roof has a great impact on the stability of the basic roof.The harder the direct roof rock is,the more stable the basic roof is.With the increase of the hardness of the direct roof lithology,the displacement of the roof rock presents a first-order exponential decay function change law;The displacement of the goaf in the roof stratum is basin shaped,symmetrically distributed relative to the centerline,and the displacement of the roof increases exponentially with the advance of the working face.

关 键 词：煤炭地下气化 顶板岩性 覆岩 移动规律 

分 类 号：TD84[矿业工程—煤矿开采]