爆炸荷载作用下煤体裂纹扩展机理模型实验研究  

Model investigation on cracks propagation in coal under blast loading

作　　者：穆朝民[1,2,3] 齐娟[4] 

机构地区：[1]安徽理工大学能源与安全学院,淮南232001 [2]煤矿安全高效开采省部共建教育部重点实验室,淮南232001 [3]总参工程兵科研三所,洛阳471023 [4]安徽理工大学现代教育技术中心,淮南232001

出　　处：《振动与冲击》2012年第13期58-61,共4页Journal of Vibration and Shock

基　　金：安徽省高等学校省级自然科学重点项目(J2011A082);高等学校博士学科点专项科研基金(20113415120003);安徽省自然科学基金项目(1208085QE85)

摘　　要：为研究煤体在柱状装药爆炸荷载作用下裂纹扩展机理,以Froude比例法为指导,建立煤层预裂爆破的模型实验。得到爆炸波在模型介质中传播的压力波形及模型表面加速度、应变、位移波形。描述模型在爆炸荷载作用下的宏观破坏现象。研究结果表明:模型实验与现场试验结果基本一致;裂纹主要是由压缩波与卸载波共同作用形成的;裂纹扩展方向与炮孔轴线方向垂直。In order to study the cracks propagation in coal under blast loading, the model experiment under loosening explosion was carried out by using the method of Froude ratio. In the experiment, the pressure waves in the model as well as the waves of acceleration, displacement and strain on the surface of the model were measured. The macro damage characteristics of model were presented. According to analysis of the test data, the law of cracks propagation in coal was summerized. The results show that cracks are formed by combined action of pressure wave and tensile wave under explosion loads. The direction of cracks propagation is perpendicular to the axis of explosion hole.

关 键 词：爆炸力学 含瓦斯煤 柱状装药 模型实验 

分 类 号：TD713[矿业工程—矿井通风与安全]