Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Blasthole spacing for control of particle size

Blasthole spacing for control of particle size

US Patent 4489983 · Granted Dec 25, 1984

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Two-level, horizontal free face mining system for in situ oil shale retorts1986
Method for control of geometry of fragmented mass in an situ oil shale retort1985
Method for explosively expanding a pillar1985
Method for forming uniform flow rubble bed1985
Stability control in underground workings adjacent an in situ oil shale retort1985
Method for loading explosive charges into blastholes formed in a subterranean fo1985
Method of forming an in situ oil shale retort in formation with joints1984
Horizontal free face blasting for minimizing channeling and mounding in situ ret1984
In situ oil shale retort having horizontal voids with side pillars1984
Method for bulking full a retort1984
Method for forming an in situ oil shale retort in differing grades of oil shale1984
Explosive expansion of formation in lifts for forming an in situ oil shale retor1984