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RISS 인기검색어
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- 저자 : 金昇坤 (검색결과 2 건)
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朴洪民,金永錫,金昇坤,金溢中 全北大學校 1982 論文集 Vol.24 No.-
This study was performed for the purpose of the physical and mechanical properties of Rhyolite, Andesite, Granite-gneiss, Quartz-porphyry, in Deogon mine. The main results obtained were as follows ; (1) The angle of internal friction and the brittleness of samples were proportioned to the ratio of compressive strength to Brazillian tensile strength. (2) The shear strength by the equation (3-3-2) was nearly equal to that on the common tangent line of Mohr's circle. (3) The stress-volumetric strain curves of all samples were divided into three stages ; the preexisting cracks were clossed at the first stage(Ⅰ), the linear elastic deformation occurred because of frictional sliding on crack face at the second stage (Ⅱ), the micro-crack was started in the sample at the third stage (Ⅲ). and the lateral strain was greater that the axial strain at the failure stage of the sample. (4) The lowering ratio of Brazilian tensile strength for dry state and saturation state of samples were high in the following order ; Quartz-porphyry, Andesite, Rhyolite, Granite-gneiss. (5) The normal stress acting on failure plane was proportioned to the compressive strength. (6) The store energy was proportioned to the strain energy.
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