煤岩组合体力学特性模拟研究  

Simulation Study of Mechanical Properties of Coal Rock Combination

作　　者：郭伟耀[1] 周恒 徐宁辉 陈文国[1] 魏平 

机构地区：[1]山东科技大学矿山灾害预防控制-省部共建国家重点实验室培育基地,山东青岛266590 [2]国投哈密能源开发有限责任公司,新疆哈密839000 [3]山东省水利工程局,山东济南250000

出　　处：《煤矿安全》2016年第2期33-35,39,共4页Safety in Coal Mines

摘　　要：为研究岩煤强度比与煤岩高度比对煤岩组合体力学特性的影响,利用颗粒流软件PFC2D对不同煤岩强度比和岩煤高度比的煤岩体进行模拟研究。结果表明:组合体破裂形态为煤体"V型"剪切破裂、煤体单一裂纹剪切破裂、煤体"X型"剪切破裂、煤岩共剪破裂4类;随着煤岩高度比的减小,冲击能量指数先增大后减小,但随着岩煤强度比的增加,冲击能量指数逐渐减小;随着煤岩高度比的减小,组合体的极限抗压强度及弹性模量均增大;随着岩煤强度比的增加,组合体的弹性模量在增大,但极限抗压强度会趋于一个稳定值。In order to study the effect of rock-coal strength ratio and coal-rock height ratio on mechanical properties of coal-rock combination, the particle flow software PFC2D was used to carry out simulation study for coal rock with different rock-coal strength ratio and coal-rock height ratio. The results showed that combination models of fracture pattern could be divided into four types, such as the V-shaped shear fracture of coal, the single shear fracture of coal, the X-shaped shear fracture of coal and the shear failure of coal and rock. With the decrease of height ratio of coal and rock, the impact energy index firstly increased, and then decreased. However, with the increase of rock-coal strength ratio, the impact energy index decreased gradually; the ultimate compressive strength and elastic modulus increased with the decrease of coal-rock height ratio, while the elastic modulus also increased with the increase of rock-coal strength ratio, and the ultimate compressive strength tended to be a steady value.

关 键 词：煤岩组合体 高度比 强度比 破裂形态 冲击能量指数 力学特性 

分 类 号：TD32[矿业工程—矿井建设]