吸附作用下煤体变形叠加关系研究  

Study on superposition relation of coal deformation under adsorption

作　　者：贾立锋 董擎 梁冰[2] 孙维吉[2] JIA Lifeng;DONG Qing;LIANG Bing;SUN Weiji(Anyang Institute of Technology,Anyang 455000,China;School of Mechanics and Engineering,Liaoning Technical University,Fuxin 123000,China)

机构地区：[1]安阳工学院,河南安阳455000 [2]辽宁工程技术大学力学与工程学院,辽宁阜新123000

出　　处：《煤矿安全》2022年第1期181-185,共5页Safety in Coal Mines

基　　金：河南省高等学校重点科研项目计划资助项目(21A590002);安阳市科技计划资助项目(202027);安阳工学院博士科研启动基金资助项目(BSJ2019019)。

摘　　要：为了验证煤体变形是煤基质吸附膨胀(解吸收缩)变形和有效应力变形的叠加,在吸附膨胀变形机理的基础上,提出了吸附作用下煤体变形叠加关系的验证方法;利用该方法结合实验数据对吸附作用下煤体变形叠加关系进行验证。结果表明:无烟煤、瘦煤、1/3焦煤等温吸附变形理论值比例系数和实验值比例系数相对误差的平均值为4.27%;煤体变形、煤基质吸附膨胀变形、有效应力作用煤体变形三者符合叠加关系;经讨论得出的煤体变形叠加关系验证方法适用于解吸曲线为可逆变形、残余变形情况,不适用于富裕变形情况。In order to verify that the deformation of coal body is the superposition of coal matrix adsorption expansion(desorption shrinkage)deformation and effective stress deformation,based on the mechanism of adsorption swelling deformation,the verification method of superposition relationship of coal deformation under adsorption was proposed.The superposition relationship of coal deformation under adsorption is verified by using this method combined with experimental data.The results showed that the average relative error of theoretical value and experimental value proportion coefficient of isothermal adsorption experiment of anthracite,lean coal and 1/3 coking coal is 4.27%.The deformation of coal body,the adsorption expansion deformation of coal matrix and the deformation of coal body under the effective stress are in accordance with the superposition relationship.Through discussion,it is concluded that the verification method of superposition relation of coal deformation is suitable for reversible deformation and residual deformation of desorption curve,but not for rich deformation.

关 键 词：安全工程 吸附变形 煤体变形 有效应力 叠加关系 

分 类 号：TD712[矿业工程—矿井通风与安全]