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Date submitted2009-07-19
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Date accepted2009-09-11
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Date published2010-04-22
Calculation of supports of parallel workings divided with yieldable pillars at anthracite seams
The article presents the methods for calculation of supports of parallel workings divided with yieldable pillars at anthracite seams. Consideration is given to the development of experimental data card for protection and maintenance of paired conveyor entries with using the steelpolymer anchor supports.
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Date submitted2009-07-09
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Date accepted2009-09-01
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Date published2010-04-22
Method of calculation stability of the open pit edges
- Authors:
- A. V. Chebakov
During the opencast mining operations with bating and opening-up of new horizons as a result of the process duration in the near-edge rock mass, fatigue accumulates, which leads to slope deformations in the form of slide rocks, rock falls, roof breaks, and, in some cases, large-scale landslides. Given that the open pit edges are complex engineering structures, on the state of which mining operations effectiveness and safety depend, their stability control is a very urgent problem.
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Date submitted1950-07-11
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Date accepted1950-09-30
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Date published1951-04-30
On fault-type displacements in cover structures
- Authors:
- I. N. Ushakov
The described displacements belong to a special type of fault tectonics, which occurs in cover structures and develops in them as a result of movements of the underlying rigid base. Therefore, displacements of this type are of interest as a characteristic example of tectonics manifestation in the coal-bearing strata of the Lower Tertiary age. A general idea of the nature of the manifestation of displacements is given by the schematic map of displacements and outcrops of coal seams (Fig. 1) and the geological section (Fig. 2). The coal-bearing strata of the Lower Tertiary age (Fig. 2) unconformably lies on the eroded surface of Mesozoic rocks. It is composed mainly of sandy clayey rocks. The underlying Mesozoic rocks in the area of contact with coal-bearing deposits are represented by destroyed conglomerate and quartz-feldspar sandstones.