FSS型超声测孔换能器在底板突水中的应用

T.R.R.Type Ultrasonic Transducer and Its Application in Monitoring Water Inrush from Floor in Coal Mine

我国华北地区煤层底板奥灰岩承压水对煤矿生产安全威胁甚大,我们研制的换能器首先在查明底板突水的原因与条件,或就突水的机理作出判断的测试中加以应用。

The working principles of T.R.R.type ultrasonic transducer and borehole hydraulic packer and operation method in situ are introduced in this paper.The instrument can be used for borehole ultrasonic detectim either in descending or in ascending way.The main features of the instrument are portable,battery power supply,hand-operated pump,easy and rapid to operate,etc.It has been used in monitering of water inrush from floor aquifer.Property of sound wave in rock,data processing method eliminatinq influence to sound velocity due to variation of original lithologys are also dis cussed.Time and location of water inrush are prodicted based on variation rule of ultrasonic velocity obtained by obsenvation data.