Search Constraints

You searched for: Topical Subjects Coal Mines and Mining--Surface Mining. Remove constraint Topical Subjects: Coal Mines and Mining--Surface Mining.
Number of results to display per page

Search Results

'The Mountaineer,60 cubic yard shovel: the Mountaineer is the world's largest shovel; it is the largest unit of mobile land machinery ever constructed in this country. It will be used to remove earth and rock overburden, with a maximum average of 90 feet in depth (under favorable contour conditions, the machine will be able to go to a top maximum of 120 feet of overburden), from the 4 1/2 foot Pittsburgh coal seam in Eastern Ohio. Although the four large machines which Hanna has had in service for several years at its open-cut mines are among the largest ever built, they are not capable of removing overburden averaging as much as 90 feet in depth. The Mountaineer makes possible the recovery of millions of tons of coal not recoverable with the smaller machines.'
'50 Cubic-Yard Shovel at Georgetown No. 12 Mine of Hanna Coal Company, Division of Pittsburgh Consolidation Coal Company: These electric shovels are used to remove the earth and rock overburden from the coal seam. In a month's time, they will each remove as much as 1,600,000 cubic yards, or some 2,400,000 tons. If this material were to be loaded into open railroad cars, it would fill some 48,000 of them.'
'Fifty-five ton tractor trailer units at Bradford No. 1 Mine near Cadiz, Ohio: Coal from the Bradford open-cut mine is loaded into 55-ton trator-trailer trucks to be transported to the Georgetown Preparation Plant where it is washed, dried and sized. Thes tractor-trailer trucks are powered by 400 H.P. Deisel V-12 engines. They have a rated capacity approximately equal to that of a railroad car (55-tons). The overall length of this unit is 55 feet. It is 12 feet in width and at its highest point, is 11 1/2 feet from the ground. The front tires on these units are 14:00 x 24. The rear tires on the tractor and the tires on the trailer are 18:00 x 25. These tractor-trailer units are lubricated while in operation by an electrically-times, automatically-controlled lubricating system, which lubricates each of the 63 bearings once each operating hour. Similar but slightly smaller capacity trucks are in use at the Georgetown No. 12 Mine. The coal is loaded, without being shot, by electric shovels having dippers of 9 cubic yards capacity.'
View of Highwall: Many feet of overburden are removed by the large electric shovels to expose the coal seam. After completion of mining operations, the land is graded. It is then planted in forage crops, and beef cattle graze on it. Many trees have also been planted on lands affected by open-cut mining operations. At approximately the vertical center of the picture is a stratum of limestone which is quarried for use as road aggregate, track ballast and agricultural meal.  Hanna Coal Company, Division of Pittsburgh Consolidation Coal Company
'Cadiz Drive-In Theater Near Cadiz, Ohio: The theater is located on land which had been affected by open-cut mining. The mining of the coal and the grading of the land after completion of mining operations was done by Hanna Coal Company, Division of Pittsburgh Consolidation Coal Company.'
'Hanna Coal Company, Division of Pittsburgh Consolidation Coal Company has planted many millions of trees on lands which have been affected by open-cut mining. It is evident from the photograph that the trees thrive very well on this land. These newly created forests provide sanctuary for wild life, and in recent years there has been a moticeable increase in the amount of wild life present in these new forest areas. The trees in this photograph had been planted for some seven years at the time the photograph was taken. When these trees reach maturity they will have many uses, including that of supplying roof support material for Hanna's underground mines.'
'The nature of Hanna Coal's surface mining operations is illustrated here. Among the company's seven strip shovels for removing the overburden and uncovering the 52-inch vein of coal, are four giants weighing in the neighborhood of 1,800 tons each, equipped with booms up to 120 feet long, and with scoops having a capacity up to 50 cubic yards. Each of these large shovels can move enough stone and earth per year to cover a football field more than a mile high.'
'The nature of Hanna Coal's surface mining operations is illustrated here. Among the company's seven strip shovels for removing the overburden and uncovering the 52-inch vein of coal, are four giants weighing in the neighborhood of 1,800 tons each, equipped with booms up to 120 feet long, and with scoops having a capacity up to 50 cubic yards. Each of these large shovels can move enough stone and earth per year to cover a football field more than a mile high.'
Marion Shovel Model 28 during strip mining.  Donkey is pulling a cart.
Marion Power Shovel Company shovel, The Mountaineer, working on a surface mine.
Hanna Coal Co. Shovels: 'looks like 'The Mountaineer' on the right and probably 'The Tiger' on 'The Green Hornet' on the left.'