含瓦斯煤体爆破损伤模型研究  

Study on Blasting Damage Model of Coal Containing Gas

作　　者：褚怀保[1] 杨小林 梁为民[1] 余永强[1] 

机构地区：[1]河南理工大学土木工程学院,河南焦作454000

出　　处：《煤矿安全》2015年第11期24-26,共3页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(50874039);河南省骨干教师基金资助项目(2013GGJS-051);河南理工大学骨干教师资助项目(72105/136);河南理工大学博士基金资助项目(B2013-062)

摘　　要：含瓦斯煤体是一种复杂的力学介质,瓦斯气体的存在使煤体的物理力学性质发生改变,对煤体的爆破作用具有积极作用。爆破作用下煤体将发生变形并改变瓦斯气体的赋存状态,这都引起煤体的孔隙率发生相应的改变。在Taylor方法的基础上,利用孔隙率定义含瓦斯煤体爆破损伤变量并确定其损伤演化方程,利用有效应力原理建立了含瓦斯煤体动态本构方程和爆破损伤模型。Coal containing gas is a kind of complicated mechanical medium,the coal mine gas changes the coal physical and mechanical properties and has a positive role on the coal blasting. The coal will be deformed and the occurrence state of gas will be changed under the blasting action,and then the porosity of coal will be changed correspondingly. Based on the Taylor method,we defined blasting damage variable by the porosity of coal and studied the damage evolution equation,then determined the constitutive equation and the blasting damage model of coal containing gas according to the effective stress principle.

关 键 词：含瓦斯煤体 损伤变量 孔隙率 有效应力 爆破损伤模型 煤体爆破 

分 类 号：TD712.7[矿业工程—矿井通风与安全]