The pillar and stall is generally practised in preference to the long wall system of " getting" the coal. None of the mines are of great depth, and a perfect freedom from fire and choke damp render it possible to carry on the work without its being necessary... The Imperial Gazetteer of India - Page 503by William Wilson Hunter - 1886 - 430 pagesFull view - About this book
| Valentine Ball - Bengal (India) - 1880 - 786 pages
...getting " the coal None of the mines are of great depth, and a perfect freedom from fire and choke damp renders it possible to carry on the work without its...best coal. Compared with ordinary English coal, the Ranigunj coals, and Indian coals generally, are very much inferior in working power, still they are... | |
| Royal Geological Society of Ireland - Geology - 1880 - 324 pages
...the coal. None of the mines are of great depth, and a perfect freedom from fire and choke-damp render it possible to carry on the work without its being...considerable thickness, one which is worked contains nearly forty feet of coal. As a rule, however, the thick seams, especially those in the lower measures, do... | |
| William Wilson Hunter - India - 1881 - 554 pages
...Calcutta, tends to give it pre-eminence over other less favourably situated localities. In the year 1 774, coal was known to occur there, and so long ago as...best coal. Compared with ordinary English coal, the Ram'ganj coals, and Indian coals generally, are very much inferior in working power ; still they are... | |
| Valentine Ball - Coal - 1881 - 152 pages
...the coal. None of the mines are of great depth, and a perfect freedom from fire and choke damp render it possible to carry on the work without its being...best coal. Compared with ordinary English coal, the Ranigunj coals, and Indian coals generally, are very much inferior in working power. Still they are... | |
| Valentine Ball - Coal - 1881 - 152 pages
...the coal. None of the mines are of great depth, and a perfect freedom from fire and choke damp render it possible to carry on the work without its being...especially those in the lower measures, do not contain the-best coal. Compared with ordinary English coal, the Ranigunj coals, and Indian coals generally,... | |
| Royal Dublin Society - Natural history - 1880 - 804 pages
...the coal. None of the mines are of great depth, and a perfect freedom from fire and choke damp render it possible to carry on the work without its being...considerable thickness, one which is worked contains nearly forty feet of coal. As a rule, however, the thick seams, especially those in the lower measures, do... | |
| Royal Dublin Society - Natural history - 1880 - 712 pages
...the coal. None of the mines are of great depth, and a perfect freedom from fire and choke damp render it possible to carry on the work without its being...considerable thickness, one which is worked contains nearly forty feet of coal. As a rule, however, the thick seams, especially those in the lower measures, do... | |
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