Coal Mine Health and Safety: Hearings ... Ninety-first Congress, First Session, on S. 355 [and Others] ...U.S. Government Printing Office, 1969 |
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Σελίδα 1021
... dust of silica , the famous knife grinders of Sheffield , for instance , and tin miners in Cornwall . They were deal- ing with rock dust or in the case of the grinders , with sandstone , which had a high percentage of silica . It was ...
... dust of silica , the famous knife grinders of Sheffield , for instance , and tin miners in Cornwall . They were deal- ing with rock dust or in the case of the grinders , with sandstone , which had a high percentage of silica . It was ...
Σελίδα 1022
... dust , and I take him as an extreme case of normal . He was 90 years old , he was a schoolteacher in our city , so this is as much dust ... rock which contains a very high amount of silica . He has round nodules ; he doesn't have a big black ...
... dust , and I take him as an extreme case of normal . He was 90 years old , he was a schoolteacher in our city , so this is as much dust ... rock which contains a very high amount of silica . He has round nodules ; he doesn't have a big black ...
Σελίδα 1023
... rock dust but the others are working on coal seams where you have the silica content down to 1 percent or so . Senator WILLIAMS . You did give it . Although it might have been missed the cause of death in the case of the coal miner ...
... rock dust but the others are working on coal seams where you have the silica content down to 1 percent or so . Senator WILLIAMS . You did give it . Although it might have been missed the cause of death in the case of the coal miner ...
Σελίδα 1041
... DUST CONTROL The overall situation is given in Table VII Table VII : Working ... rock % by place % by place % by place Stone drifts and hard headings 73 64 ... dust suppression in the industry . Ten mobile x - ray units visited every ...
... DUST CONTROL The overall situation is given in Table VII Table VII : Working ... rock % by place % by place % by place Stone drifts and hard headings 73 64 ... dust suppression in the industry . Ten mobile x - ray units visited every ...
Σελίδα 1094
... Rock Dust and Coal Dust : This section establishes requirements for the control of coal dust through rock dusting . Minimum standards for rock dusting are established . Source , Section 209 ( e ) , Federal Act , with additions . Section ...
... Rock Dust and Coal Dust : This section establishes requirements for the control of coal dust through rock dusting . Minimum standards for rock dusting are established . Source , Section 209 ( e ) , Federal Act , with additions . Section ...
Συχνά εμφανιζόμενοι όροι και φράσεις
bits 0 Cause BLACKWELL blasting BOGGS Bureau of Mines carbide lamp carbide-tipped bits centum Chairman circuit Classification Source Coal Board coal dust COAL MINE IGNITIONS Coal Mine Safety collieries committee continuous miner bits cutting machine bits date State Classification electric arc emitted when bits equipment examination Federal Coal feet flame safety lamp frictional sparks gassy continuous miner gassy cutting machine gassy explosives gassy mines GOUGH hazard health and safety ignited gas ignited methane ignition Fatal Nonfatal IGNITIONS AND EXPLOSIONS industry inspection inspector kerf Linkous loading machine locomotive lung Medical methane at face Methane ignited Methane was ignited milligrams MITTELMAN MULLINS National Coal Board nongassy nonpermissible O'LEARY open flame operator permissible persons pneumoconiosis RALPH NADER rock dust roof fall Secretary Senator RANDOLPH Senator WILLIAMS silicosis Source of ignition Sparks created Sparks emitted standards tion trailing cable U.S. Senate UNDERGROUND COAL ventilation X-ray