Horizontal free face blasting for minimizing channeling and moun

Details Horizontal free face blasting for minimizing channeling and moun Horizontal free face blasting for minimizing channeling and moun

1981-01-23

1983-08-02

Purser, Ernest R.

Mining or in situ disintegration of hard material

Processes

Explosive

299 2, 102312, E21C 4110

Patent

active

043962319

ABSTRACT:
There is provided a method for forming an in situ retort containing a fragmented permeable mass of formation particles in a retort site within a subterranean formation. A void is excavated into the formation and a zone of unfragmented formation is left adjacent the void. A plurality of explosive charges are formed in the zone of unfragmented formation. At least one central explosive charge is in a central portion of the zone of unfragmented formation, and a plurality of outer explosive charges are in the zone of unfragmented formation nearer the side walls of the void than the central explosive charge. The distance from each such outer explosive charge to an adjacent side wall of the void is about equal to the crater radius of the outer explosive charge. The central and outer explosive charges are detonated for explosively expanding the zone of unfragmented formation toward the void for forming a fragmented permeable mass of formation particles in the in situ retort. The retort has a horizontal cross-sectional area at an intermediate elevation which is less than the horizontal cross-sectional area of the retort at elevations above and below the intermediate elevation.

REFERENCES:
patent: 3342257 (1967-09-01), Jacobs et al.
patent: 4243100 (1981-01-01), Cha
Redpath "Applic. of Cratering Char. to Conventional Blast Design" Soc. of Min. Eng. & Am. Inst. of Min. Met. & Pet. Eng., 1977.

Affiliated with

Also associated with

Rating

Horizontal free face blasting for minimizing channeling and moun does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Horizontal free face blasting for minimizing channeling and moun, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Horizontal free face blasting for minimizing channeling and moun will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-480756