3 edition of Analysis of cutter roof failure induced by clastic dikes in an underground coal mine found in the catalog.
Bibliography: p. 22-23.
|Statement||U.S. Dept. of the Interior, Bureau of Mines|
|Publishers||U.S. Dept. of the Interior, Bureau of Mines|
|The Physical Object|
|Pagination||xvi, 82 p. :|
|Number of Pages||97|
|3||Report of investigations (United States. Bureau of Mines) ;|
nodata File Size: 4MB.
Hydraulic mining is used for placer deposits of gold, tin, and other metals. A developing heading driven to the dip, usually the full dip of the coal seam; worked by rope haulage. 2 Failure of pillars Prognostication of pillars durability without taking into account rheological properties is a difficult task. A staging or platform suspended in a sinking shaft on which masons stand when building brick walling. The aim was to determine the main parameters for supported immediate roof deformation in areas with great entry advance rates.
- Irregular interbedding stands for rock formations with non-parallel boundaries. Since one is not derivable from the other by any rotation, there is no twinning axis. 336 DIMENSIONAL STONE QUARRYING 9.
BA: Ledvina-Christopher-Thomas PY: 1991 DG: Doctoral DI: Northwestern University. AU: Kane-William-F; Milici-Robert-C; Gathright-Thomas-M II SO: Bulletin of the Association of Engineering Geologists. Hard overburden consists of limestone layers and is blasted before excavation. A fibrous variety of baddeleyite. The results can be useful in further planning of anchor-bolt grid. Seismic attributes are useful tools for identifying and characterizing geological properties.Characterization of Deep Marine Clastic Systems, Geological Society Special Publication Londonp.
An improved scheme is proposed for monitoring the water inrush against traditional MS technology based on the above conclusions. A trigonal mineral, K sub 2 Ca CO sub 3 sub 2 ; dimorphous with fairchildite. A jigger operated by a hand lever. AU: Xu-Lin-Sheng; Shong-Yong-Jing BK: In: Rock mechanics as a guide for efficient utilization of natural resources; proceedings of the 30th U.
The flotation process, which is versatile, can separate minerals as large as 3.
This has been studied essentially in the Euclidean case.
A hexagonal mineral, Ca,Th,Ce PO sub 4.
Available analytical tools are sufficient for most types of analyses required by the industry.