Crack of rock mass and grouting based on ultrasonic testing

摘要：

　　On account of the fact that ultrasonic testing has the characteristic of high-efficiency, low request for rock shapes and accurate test results of rock strength, the crack of rock mass and grouting process were simulated through laboratory test.The ultrasonic velocity of rock mass with different kinds of crack widths was measured using ultrasonic testing technology.The change rules of ultrasonic velocity were contrasted in grouting and non-grouting states, in dry and wet states.The results show that the ultrasonic velocity varies a lot in different lithology rocks and also changes in the same lithology rock.The ultrasonic velocity of limestone is the highest, followed by sandstone, finally mudstone.The ultrasonic velocity reduces with the increase of crack width and also with the increase of water content in the same crack width.Compared with non-grouting, the ultrasonic velocity increases obviously after grouting.The results confirm that using ultrasonic to test the wave velocity in rock is an effective method for evaluating the effect of grouting reinforcement of fractured rock mass.

关键词： Fractured rock mass Grouting reinforcement Ultrasonic testing Primary wave velocity

作者: Yanchun Xu Xiaofeng Xie Kunqi Li

作者单位: School of Resource & Safety Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China

会议类型: 国际会议

会议名称: 2015 International Academic Forum for Mine Surveying in China(2015中国国际矿山测量学术论坛)

会议地点: 北京

会议语种:英文

页码: 228-234

在线出版日期: 2015-10-16（万方平台首次上网日期，不代表论文的发表时间）