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Numerical Simulation of Gas Flow within a Radial Fracture Created by Single-Hole Blasting  

Jeng, Yong-Hun (서울대학교 에너지자원신기술연구소)
Lee, Chung-In (서울대학교 공과대학 지구환경시스템공학부)
Publication Information
Tunnel and Underground Space / v.16, no.5, 2006 , pp. 413-421 More about this Journal
Abstract
In order to explain entirely dynamic fracture process induced by blasting in rock mass, it needs to consider detonation pressure and gas pressure acting on blasthole wall simultaneously. In this study, prior to simulating the coupling between gas flow and rock mass, we analyzed effects of gas pressure-time history, length of cracks and equation of state adopted to calculate the gas pressure on the gas flow within a radial fracture created by single-hole blasting. The effects were investigated on two assumptions: (a) the radial fracture was composed of 5 cracks which were 0.01 m in length and 0.001 m in asperity each and (b) the PETN explosive which diameter was 36 mm was charged in a blasthole of 45 mm diameter. It was concluded that the maximum gas pressure and its travel time were dependent on characteristics of charged explosives and geometrical properties of radial fracture.
Keywords
Gas pressure; Gas flow; Radial fracture; Single-hole blasting; Numerical simulation;
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1 최병희, 2005, PFC 폭원모델링과 콘크리트 기둥 발파에의 적용 연구, 공학박사학위논문, 전남대학교 대학원
2 Nilson, R.H., Proffer, W.J., Duff, R.E., 1985, Modelling of gas-driven fractures induced by propellant cornbustion within a borehole, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, Vol. 22, No. I., pp. 3-19
3 Roberts, J.M., Swenson, D.V., Numerical model of gasdriven dynamic fractures with an application to borehole simulation, Computers in Engineering 1988, Vol. 3, pp. 1-6
4 정용훈, 2006, 발파에 의한 굴착손상영역의 수치해석적 산정, 서울대학교 공학박사학위논문, 255 p
5 Preece, D.S., Thorne, B.J., Baer, M.R., Swegle, J.W., 1994, Computer simulation of rock blasting: a summary of work from 1987 through 1993, Report No. SAND92-1027, Sandia National Laboratories
6 Munjiza, A., Owen, D.R.J., Bicanic, N., Owen, J.R., 1994, On a rational approach to rock blasting, Computer Methods & Advances in Geornechanics, pp. 857-862
7 Cho, S.H., Nakamura, Y, Kaneko, K., 2004, Dynamic fracture process analysis of rock subjected to stress wave and gas pressurization, International Journal of Rock Mechanics and Mining Sciences, Vol. 41, No.3 (CD-Rom)
8 Urtiew, P.A., Hayes, B., 1991, Parametric study of the dynamic JWL-EOS for detonation products, Combustion, Explosion, and Shock Waves, Vol. 27, No.4, pp. 126-137
9 Munjiza, A., Latham, J.P., Andrews, K.R.F., 2000, Detonation gas model for combined finite-discrete element simulation of fracture and fragmentation, International Journal for Numerical Methods in Engineering, Vol. 49, pp. 1495-1520   DOI   ScienceOn
10 Nilson, R.H., 1988, Similarity solutions for wedgeshaped hydraulic fractures driven into a permeable medium by a constant inlet pressure, International Journal for Numerical and Analytical Methods in Gcornechanics, Vol. 12, pp. 477-495   DOI   ScienceOn
11 윤지선, 1992, 최신 발파기술, 구미서관, 216 p
12 Cho, S.H., Risei, K., Kato, M., Nakamura, Y., Kaneko, K., 2002, Development of numerical simulation method for dynamic fracture propagation due to gas pressurization and stress wave, Proceedings of 2002 ISRM Regional Symposium (3rd Korea-Japan Joint Symposium) on Rock Engineering Problem and Approaches in Underground Construction, Seoul (Korea), pp. 755-762
13 Singh, S.P., 1993, Prediction and determination of explosive induced damage, Proceeding of the 4th International Symposium on Rock Fragmentation by Blasting (Fragblast-4), pp. 183-192