Explosive fluid transmitted shock method for mining deeply buried coal

Patent · Tue Jun 22 00:00:00 EDT 1976

OSTI ID:862576

Archibald, Paul B ^[1]

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1. Pleasanton, CA

A method for recovering coal from deeply buried deposits comprising drilling a hole down into a coal seam, filling the hole with water, and periodically detonating an explosive charge at the bottom of the water-filled hole. The water transmits the explosive shock wave to the face of the coal seam, thereby fracturing and dislodging the coal. The resulting suspension of loose coal in water is then pumped to the surface where the coal is recovered and the water is recycled to the mining operation.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States Energy (Washington, DC)
• Patent Number(s): US 3964792
• OSTI ID: 862576
• Country of Publication: United States
• Language: English

Related Subjects

explosive
fluid
transmitted
shock
method
mining
deeply
buried
coal
recovering
deposits
comprising
drilling
seam
filling
water
periodically
detonating
charge
bottom
water-filled
transmits
wave
fracturing
dislodging
resulting
suspension
loose
pumped
surface
recovered
recycled
operation
coal seam
shock wave
explosive charge
recovering coal
comprising drilling
deeply buried
/299/102/166/