2009, Volume 11, Issue 4
Strategic Study of CAE >> 2009, Volume 11, Issue 4
Experimental study on enhanced coupling of underground explosions by water-filled cavities
Northwest Institute of Nuclear Technology, Xi'an 710024, China
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Abstract
A series of laboratory experiments have been performed to study the enhanced coupling of explosions by placing them in water-filled cavities or in air-filled cavities on a half sphere apparatus of cement mortar with 1.6 m in diameter. There is a cavity of 0.3 m in diameter at the center of the apparatus, the cavity can be filled with water or inserted a core of cement mortar, the source conditions consisted of tamped source and spherical cavities with a spherical charge of yield equivalent to 1.00 g of TNT. Measurements consisted of longitudinal strains of the aluminum bars sticking on the surface of the sphere apparatus at several points, and from which particle velocities, displacements were obtained. On the basis of the results of these small-scale experiments, conclusions are drawn concerning the coupling of the explosive energy. The effect of cavity decoupling in water is not as good as in cement mortar. When the explosive source is detonated in a water-filled cavity, the stress wave coupled into cement mortar is greatly enhanced. It follows that the damage of surrounding rock or dam by underwater explosion would be more possibly compared to the explosion detonated in themselves with same yield and same distance, and the enhanced coupling seems to be shown for air explosion nearby water.
Keywords
underwater explosions ; surrounding rocks enhanced coupling ; cement mortar ; stress waves ; cavity decoupling
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References
[ 1 ] Latter A L, Lelevier R E, Martinelli E A, et al.A method of con- cealing underground nuclear explosions [ J ] . J Geophys Res, 1961 , 66 ( 3 ) :943 -946 link1
[ 2 ] Herbst R F, Werth G C, Springer D L.Use of large cavities to re- duce seismic waves from underground explosion [ J ] .J Geophys Res, 1961 , 66 ( 3 ) : 959 -978 link1
[ 3 ] Rodean H C.Cavity decoupling of nuclear explosions[ R] .UCRL -51097 , 1971
[ 4 ] Sykes L R.Yields of underground nuclear explosions at Azgir and Shagan River, USSR and implications for identifying decoupled nuclear testing in salt[ R] .AD -A250971 , 1991
[ 5 ] Sykes L R.Dealing with decoupled nuclear explosions under a comprehensive test ban treaty[ R] .AD -A290740 , 1994
[ 6 ] Murphy J R, Kitov I O, Stevens J L, et al.Analysis of the seismic characteristics of U.S.and Russian cavity decoupled explosions [ R] .AD -A293244 , 1994
[ 7 ] Murphy J R, Kitov I O, Rimer N, et al.Further studies of the seismic characteristics of Russian explosions in cavities: Implica- tions for cavity decoupling of underground nuclear explosions[ R] . AD -A305955 , 1996
[ 8 ] 王占江,李孝兰,林俊德,等.微药量爆炸激发的水泥砂浆球表运动测量和分析[J].固体力学学报,2002,23(专辑):119-123
[ 9 ] 王占江.岩土中填实与空腔解耦爆炸的化爆模拟实验研究[D].长沙:国防科技大学,2003 link1
[10] 王占江,李焰,张德志,等.高强度水泥砂浆的一维应变动力学特性[J].爆炸与冲击,1999,13(增刊):344-348
[11] Cizek J C, Florence A L, Keough D D, et al.Experimental stud- y of the effects of faults on spherical wave propagation, phase 1 [ R] .AD -A081080 , 1979
[12] Cizek J C,Florence A L.Laboratory investigation of containment in underground nuclear tests[ R] .AD -A130292 , 1982
[13] Cizek J C,Florence A L.Laboratory investigation of containment of underground explosions[ R] .AD -A151712 , 1983
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