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고진석 ( Jin Suk Ko ),김봉주 ( Bong Ju Kim ),최낙철 ( Nag Choul Choi ),김성배 ( Song Bae Kim ),박정안 ( Jeong Ann Park ),박천영 ( Cheon Young Park ) 대한지질공학회 2012 지질공학 Vol.22 No.4
In this study, an electrical resistivity survey and a drilling investigation were conducted at an animal carcass disposal site. Chemical analysis of leachate collected from the site was also performed (sampling times: May 2011 and June 2012). Five lines of dipole?dipole electrical resistivity surveys were carried out, along with drilling investigations at 3 points within the disposal areas and 11 points near the disposal site. Two-dimensional inverse modeling of the collected resistivity data was performed to evaluate the properties (size, depth, and form) of the disposal site. Leachate analysis showed that PH of leachate decreased from 7.4 to 6.7, while Eh changed from-358mV to -48mV over time. In addition, dissolved ions increased due to the progression of carcass decomposition. Resuits of the electrical resistivity survey indicated that low resistivity zones(minimum value, 0.64Ωm) existed at a depth of 8 m from the surface. Considering the bedrock location and carcass disposal depth, there was no evidence of bedrock contamination by leachat. The results of the electrical resistivity survey are consistent with those of the drilling investigation, which indicates that electrical resistivity effectively depicted the properties of the disposal site. This study demonstrates that electrical resistivity survey is a suitable technique for investigation of animal carcass dis-posal sites.
이상호(Sang-ho Lee),고진석(Jin-suk Ko),정연하(Yeon-ha Jung),신현수(Hyun-Soo Shin),김창준(Chang-Joon Kim),이승열(Seoung-yeol Lee),한창수(Chang-soo Han) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
A tracked robot has an excellent mobility on the rough terrain. Especially, a tracked robot for driving has to get structural function in the every field. In this paper, we propose a tracked robot of a small rear wheel typed. Also compared and estimated a driving analysis about the tracked robot in considered the general environment. Compared 2 models are different in size of rear wheels but front wheels are same size each other. From comparing model, the radius of front wheels is 100㎜ and the radius of rear wheels is 100㎜. The radius of front wheels is 100㎜ and the radius of rear wheels is 70㎜ from proposed tracked robot. Depend on these radiuses of values we are known driving torque values of an actuating wheel using Recurdyn. And estimated stress of rotated track by an actuating wheel using Ansys. finally, the designed robot has size of 600㎜ × 330㎜ × 150㎜, weight is 27㎏ and the tracked robot is actuated by 2 geared DC motors.
Dock Wall에서 Pre-splitting 발파의 적용성에 관한 연구
강추원,고진석,강석곤 조선대학교 동력자원연구소 1997 動力資源硏究所誌 Vol.19 No.1
The contour blasting minimize the strain and the rocks are destroyed to the theoretical projected line by adding or substracting the explosive compound amounts. On pre-splitting blasting, the most important factors are the base rock conditions, accuracy of drilling, kind of explosive compound used, and charge. The first test blast is classified in eight groups, which is done to find more accurate blasting conditions after a variety of blasting methods are used. Through the conditions of charge of the first test blast, after the best blast method is selected the second test blast is performed. The number of holes and hole spacing are corrected on the second test blast, which takes change to reduce construction days and working conditions. In the second test blast charge conditions. Pattern Y is the method for see a cutting plane of 90˚ for the reducing of dock-wall parts.
강추원,고진석,이형주 조선대학교 에너지.자원신기술연구소 1998 에너지·자원신기술연구소 논문지 Vol.20 No.1
One of the most troublesome and controversial issues facing the construction is that of ground vibrations, fly rock and air blasts produced from blasting Particularly, ground vibrations bring on directly or indirectly many damages On this study, data of vibration was collected in rock blasting then analyzied data and frequency characterizations of blasting vibration was studied The results can be summarized as follow 1 the formular of square and cube root scaled distance which have a confidence level at the point of 95% are as follows V = 6159.564(D/W^(1/2))^(-1 824) V = 11368.677(D/W^(1/3))^(-1 846), respectively 2 It was found that is proper to get principal frequency by Fast Fourier Transform among two methods 3. This study suggests that new allowable values of vibration according to frequency Namely, If principal frequency is more than 20㎐, then allowable values of vibration should be 0 5㎝/sec and less than 20㎐, then allowable values of vibration should be 0 3㎝/sec.