Experiment of Influence of Fractures on Coal/Rock Acoustic Velocity： with Carboniferous Seams of Qinshui Basin as an Example

详细信息   

• 责任者：Zhou Feng (School of Earth Science and Engineering ; Nanjing University ; Nanjing 210093 ; China )
• 刊名：Coal Geology & Exploration
• 出版年：2012
• 卷期：40(2)
• 关键词：煤岩 ; coal rocks ; 超声波法 ; ultrasonic methods ; 沁水盆地 ; Qinshui Basin
• 页码：p.71-74
• 图表：1 illus., 1 table, 8 refs.
• 分类号：1600
• issnNo：ISSN1001-1986
• isbnNo：CN61-1155/P

摘要

In order to study the impact of fractures on the ultrasonic velocity, multi-azimuth ultrasonic velocity of coal were tested under the pressure similar to buried stratum in Qinshui Basin. The experimental results shows that: 1） fractures will reduce ultrasonic velocity, but when the confining pressure increases to 10 MPa, most of fractures are closed together, the velocity comes table;  and 2）orientation of fractures makes certain impact on acoustic propagation velocity.