节理裂隙岩体微差间隔时间爆破试验  

Joint fractured rock mass millisecond interval time blasting experiment

作　　者：李世丰 章征成 

机构地区：[1]辽宁工程技术大学矿业学院,辽宁阜新123000

出　　处：《露天采矿技术》2015年第5期33-35,38,共4页Opencast Mining Technology

摘　　要：根据岩体节理裂隙发育程度的不同设计相应的爆破间隔时间进行爆破试验研究。对油母页岩岩块、岩体进行声波纵波速度测试,确定岩体损伤程度以此反映节理裂隙发育程度,并根据测得的声波在油母页岩岩体中纵波传播速度、最小底盘抵抗线等设计微差爆破间隔时间。爆破试验后采用Split-Desktop3.1块度分析软件分析爆堆岩石块度分布,得出无损伤油母页岩岩体选取爆破间隔时间25 ms,中度损伤油母页岩岩体选取爆破间隔时间50 ms,高度损伤油母页岩岩体选取爆破间隔时间75 ms。According to different development degree of rock mass joint fracture, the author designs the corresponding blasting interval time to carry out blasting experiment research. The article carries out acoustic wave longitudinal wave velocity test on oil shale rock and rock mass to determine the rock mass damage degree, in order to reflect joint fracture development degree. According to the measured longitudinal wave propagation velocity of acoustic wave in oil shale rock, minimum chassis resistance line, the author designs millisecond blasting interval time. After blasting experiment, the author adopts Split-Desktop3.1 software to analyze rock fragmentation distribution, and obtains that blasting interval is 25 ms for no damage oil shale rock; blasting interval is 50 ms for moderate damage oil shale rock; blasting interval is 75 ms for high damage oil shale rock .

关 键 词：节理裂隙 间隔时间 纵波速度 爆破效果 

分 类 号：TD235[矿业工程—矿井建设]