This effect is apparently decisive for the initiation of a zone of instabilities ahead of the crack tip, and, consequently, for conditions favorable to macrocrack caving.
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Experience with the strengthening of beds and foundations beneath structures on soils prone to caving in Ufa is described.
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Strengthening beds and foundations during the rehabilitation of industrial structures on soils prone to caving
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Sampling for microfossils in exploratory wells in basins with hydrocarbon potential is subject to considerable uncertainty, mainly because the samples usually are small and subject to caving.
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The modeling with the finite element method was employed to study the block caving process for mining the Milas diasporite deposit in Western Turkey.
At the New Pit № 1 of Hokang Colliery during these years, satisfactory results have been obtained in adopting precautionary mud-flushing technique to prevent sponta-neous combustion in working extra-thick seams by slice mining with complete caving of roof.This article was written on the basis of the author's experience at this pit. Stress is laid upon the method of mud-flushing, certain technical problems on flushing, condi-tion of mud distribution in caving area and the comparison with hydrauli...
The 15-foot seam and its underlying 8-foot seam of the Tu-er-ping Mine, constitu-ting a group of thick seams with hard roofs lying closely together. This article is based upon obervations made on the 15-foot seam while mining was carried out at the № 2647 Face.Roof control was accomplished by forced-down caving, with entire roof subsiden-ce, thereby noting the breaking-up and the shifting of the roof, for ascertaining the rock pressure and its natural law.Such study brings benefit as to the improvemen...
The paper is written with the attempt to describe the original body (shape and position) possessed by the drawn-ore grains and the moving rules relevant to it,esp for the case that the ore grains drawn from multi-drawpoint during caving.It is of significance to predict the courses of both ore loss and ore dilution and to determine the optimal structural parameters for mining process.As ore grains drawn form single drawpoint which located at the bottom of stope,expressions for the transformation of pos...