Based on the principle of in-situ transient pulse technique and its solving method

the small size in-situ transient pulse permeability measurement system

including data acquisition control system

pulse applying system

and permeability measuring system

has been developed successfully. Due to its simple configuration and small size

it is easy to control and use to measure the permeability of low-permeable in-situ confining rocks rapidly

which are often studied in geological disposal of radioactive waste，underground gas and oil storage tanks and construction of deep cavern groups

etc. Moreover

other kinds of rock mass within narrow surrounding spaces or serious disturbance requirements also can be measured. The small size in-situ transient pulse permeability measurement experiments have been introduced in this paper by using this system

of which the applicability

stability and accuracy have been proved.