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Work carried out to stabilize ground below headgear abutments and consolidation of hoisting engine foundation at British mine; injection holes were drilled in 3 phases -- vertical holes into ground about 2 ft away from abutments, raking holes into abutments from surface, and horizontal holes into abutments from inside shaft -- drilled off top of cage; neat cement was used for fine fissures; portland cement was used when sulfates were encountered.
Work carried out to stabilize ground below headgear abutments and consolidation of hoisting engine foundation at British mine; injection holes were drilled in 3 phases -- vertical holes into ground about 2 ft away from abutments, raking holes into abutments from surface, and horizontal holes into abutments from inside shaft -- drilled off top of cage; neat cement was used for fine fissures; portland cement was used when sulfates were encountered.
Consolidation grouting at Cortonwood colliery
Colliery Guardian
Kaye, R.D. (author)
Colliery Guardian ; 206
1963
2 pages
Article (Journal)
English
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