UNDER-ICE MINING TECHNIQUES.
Methods of excavating in the Greenland Ice Cap, and the planning required, equipment employed, and problems encountered are described individually for each of 5 operating seasons (1955-1959), and relative cost evaluations of the different methods are given. Three basic methods were used: hand-pickin...
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ftdtic:AD0652711 2023-05-15T15:06:21+02:00 UNDER-ICE MINING TECHNIQUES. Abel,John F. , Jr SNOW ICE AND PERMAFROST RESEARCH ESTABLISHMENT WILMETTE ILL 1961-01 text/html http://www.dtic.mil/docs/citations/AD0652711 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0652711 en eng http://www.dtic.mil/docs/citations/AD0652711 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Mining Engineering Snow Ice and Permafrost (*COOLING *MINING ENGINEERING) CONSTRUCTION MATERIALS GREENLAND COSTS VENTILATION ARCTIC REGIONS DRILLING UNDERGROUND STRUCTURES ICE DETONATIONS Text 1961 ftdtic 2016-02-18T20:08:34Z Methods of excavating in the Greenland Ice Cap, and the planning required, equipment employed, and problems encountered are described individually for each of 5 operating seasons (1955-1959), and relative cost evaluations of the different methods are given. Three basic methods were used: hand-picking and manual haulage; explosives and manual haulage (drill-blast-muck cycle); and mechanized mining and haulage. Manual methods, which are of low capacity and limited to widths under 12 ft, are justified only when small openings are required, and in remote, inaccessible regions. The drill-blast-muck cycle of mining has a slightly higher capacity than manual methods, but requires power to operate the drills and to ventilate after blasting. Explosives can be used for room spans not exceeding 12 ft; when greater spans are excavated by blasting, the resulting roof is unstable. The machine method using mechanized coal mining equipment has the highest capacity and the lowest unit cost. Openings with roof spans in excess of 36 ft have been made with coal mining machines without dangerous roof conditions developing. Text Arctic Greenland Ice Ice cap permafrost Defense Technical Information Center: DTIC Technical Reports database Arctic Greenland |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Mining Engineering Snow Ice and Permafrost (*COOLING *MINING ENGINEERING) CONSTRUCTION MATERIALS GREENLAND COSTS VENTILATION ARCTIC REGIONS DRILLING UNDERGROUND STRUCTURES ICE DETONATIONS |
spellingShingle |
Mining Engineering Snow Ice and Permafrost (*COOLING *MINING ENGINEERING) CONSTRUCTION MATERIALS GREENLAND COSTS VENTILATION ARCTIC REGIONS DRILLING UNDERGROUND STRUCTURES ICE DETONATIONS Abel,John F. , Jr UNDER-ICE MINING TECHNIQUES. |
topic_facet |
Mining Engineering Snow Ice and Permafrost (*COOLING *MINING ENGINEERING) CONSTRUCTION MATERIALS GREENLAND COSTS VENTILATION ARCTIC REGIONS DRILLING UNDERGROUND STRUCTURES ICE DETONATIONS |
description |
Methods of excavating in the Greenland Ice Cap, and the planning required, equipment employed, and problems encountered are described individually for each of 5 operating seasons (1955-1959), and relative cost evaluations of the different methods are given. Three basic methods were used: hand-picking and manual haulage; explosives and manual haulage (drill-blast-muck cycle); and mechanized mining and haulage. Manual methods, which are of low capacity and limited to widths under 12 ft, are justified only when small openings are required, and in remote, inaccessible regions. The drill-blast-muck cycle of mining has a slightly higher capacity than manual methods, but requires power to operate the drills and to ventilate after blasting. Explosives can be used for room spans not exceeding 12 ft; when greater spans are excavated by blasting, the resulting roof is unstable. The machine method using mechanized coal mining equipment has the highest capacity and the lowest unit cost. Openings with roof spans in excess of 36 ft have been made with coal mining machines without dangerous roof conditions developing. |
author2 |
SNOW ICE AND PERMAFROST RESEARCH ESTABLISHMENT WILMETTE ILL |
format |
Text |
author |
Abel,John F. , Jr |
author_facet |
Abel,John F. , Jr |
author_sort |
Abel,John F. , Jr |
title |
UNDER-ICE MINING TECHNIQUES. |
title_short |
UNDER-ICE MINING TECHNIQUES. |
title_full |
UNDER-ICE MINING TECHNIQUES. |
title_fullStr |
UNDER-ICE MINING TECHNIQUES. |
title_full_unstemmed |
UNDER-ICE MINING TECHNIQUES. |
title_sort |
under-ice mining techniques. |
publishDate |
1961 |
url |
http://www.dtic.mil/docs/citations/AD0652711 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0652711 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Ice Ice cap permafrost |
genre_facet |
Arctic Greenland Ice Ice cap permafrost |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/AD0652711 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766337974676488192 |