Controlled fragmentation of hard rock by pressurization of the bottom of a drill hole
A Standard patent application filed on 21 September 1998 credited to Young, Chapman III
;
Watson, John D.
Details
Application number :
86107
Application type :
Standard
Application status :
CEASED
Under opposition :
No
Proceeding type :
Invention title :
Controlled fragmentation of hard rock by pressurization of the bottom of a drill hole