Near-source characterization of the seismic wavefield radiated from quarry blasts     

Sharon K. Reamer  Klaus-G. Hinzen  Brian W. Stump 《Geophysical Journal International》1992,110(3):435-450

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用爆破地震研究湖南省深部构造与地震的关系     

黎品忠  刘北京 《华南地震》1991,11(1):28-33

利用湖南省棋梓桥万罗山定向爆破观测资料,使用迭代法对棋梓桥至酃县剖面进行了二维构造反演,得到4层地壳结构模型:界面1埋深1.8—4km,v<6.0km/s;界面2埋深10.5—15km,6.0km/s相似文献   

河南祁雨沟爆破角砾岩型金矿床包裹体研究   总被引：10，自引：1，他引：10  

谢奕汉  范宏瑞 《矿物学报》1991,11(4):370-376

本文通过包裹体研究了祁雨沟爆破角砾岩型金矿床成矿流体来源、性质和成矿物理化学条件,为该类型金矿找矿与评价提供依据。  相似文献   

连县小带铅锌铁锰矿床特征与喷流沉积机制浅析   总被引：1，自引：0，他引：1  

郑庆年 《矿产与地质》1992,6(2):111-117

连县小带是粤北近几年发现的又一喷流沉积铅锌矿床。简要介绍其成矿环境、地质特征,讨论喷流(喷气)沉积(成矿)作用及成矿分带的主要地球化学机制,如因脉动喷流(喷气)造成盆地内地球化学性质的周期变化,引起矿石组构的周期变化等。  相似文献   

On the determination of the mesh size for numerical simulations of shock wave propagation in near field underwater explosion     

《Applied Ocean Research》2016

It is well known that the accuracy of mesh-based numerical simulations of underwater explosion strongly relies on the mesh size adopted in the analyses. Although a numerical analysis of underwater explosion can be performed with enough accuracy by using considerably fine meshes, such fine meshes may lead to substantially increase in the CPU time and the usage of computer memory. Thus, how to determine a suitable mesh size in numerical simulations is always a problem confronted when attempting to study the shock wave propagation resulting from underwater explosion and the subsequent response of structures. Considering that there is currently no universally accepted method for resolving this problem, this paper aims to propose a simple method to determine the mesh size for numerical simulations of near field underwater explosion. To this end, the mesh size effects on the shock wave propagation of underwater explosion are carefully investigated for different charge weights, through which the correlation between mesh sizes and charge weights is identified. Based on the numerical study, a dimensionless variable (λ), defined as the ratio of the radius of charge to the side length of element, is introduced to be the criterion for determining the mesh size in simulations. It is interesting to note that the presented method is suitable for various charge weights. By using the proposed meshing rule, adequate balance between solution accuracy and computational efficiency can be achieved for different blast scenarios in numerical simulations of underwater explosion.  相似文献   

Underwater Explosion Treatment of Marine Soft Foundation   总被引：11，自引：0，他引：11  

Zheng Zhemin  Yang Zhengsheng Jin Liu Professor  Academician of Chinese Academy of Sciences  Director of Mechanics Institute of Chinese Academy of Sciences  Beijing Professor  Mechanics Institute of Chinese Academy of Sciences  Beijing Senior Engineer  Lianyungang Harbor Construction Command Post  Lianyungang  Province of Jiangsu 《中国海洋工程》1991,(2)

The consolidation of soft foundation is a problem that commonly appears in harbor construction engineering on muddy coast. Introduced in this paper is the experimental study on underwater explosion treatment of soft foundation, including the regulations of explosion hollow development and medium movement, the law of similarity of densification and settlement of filled stone mass by shock wave pressure and explosion energy and their construction technologies, etc. A number of projects have been completed by applying this new technique, and the technique itself has been proved practicable.  相似文献   

福建长乐人工震源波的观测与分析     

张弦  陈绯雯 《台湾海峡》1990,9(1):43-47

使用DCS-302数字磁带记录地震仪在近场(震中距△≤5km)观测人工爆破源产生的地震波,在不同方位、不同震中距和土层条件下得到了9条近场地面运动加速度记录。通过回放及计算机处理研究了近场爆破地震波记录波形特征、频谱特性、振幅特征、衰减情况以及加速度最大幅值和相应的卓越周期。  相似文献   

水下爆破工程中炸药药量的修正计算   总被引：1，自引：0，他引：1  

陈晓强周方毅  张可玉詹发民 《海洋工程》2004,22(1):107-110

在水下爆破工程中，所用药量一般是按照库尔公式来进行计算的。在爆炸过程中自由水面和水底面对爆炸作用会产生界面影响，为此提出了水下爆炸受到界面影响的药量修正系数Ki(i=1、2、3)的概念，以便在水下爆破施工中合理方便地确定实际药量。  相似文献   

Transient dynamic response of submerged sphere shell with an opening subjected to underwater explosion     

Wen-Hao Lai 《Ocean Engineering》2007,34(5-6):653-664

This investigation applies the time domain FEM/DAA coupling procedure to predict the transient dynamic response of submerged sphere shell with an opening subjected to underwater explosions. The elastic–plastic material behavior of the transient fluid–structure interaction relate to structural response equation also presented herein. This analysis also examines the transient responses of structures to different charge distances. The effects of standoff distance on pressure time history of the shell to underwater explosion (3001b TNT) are presented. Additionally, the transient dynamic responses to underwater explosion shockwaves in the sea and the air are compared.  相似文献   

Application of the ALE technique for underwater explosion analysis of a submarine liquefied oxygen tank   总被引：1，自引：0，他引：1  

Jae-Hyun Kim  Hyung-Cheol Shin 《Ocean Engineering》2008,35(8-9):812-822

The design of submarines has continually evolved to improve survivability. Explosions may induce local damage as well as global collapse to a submarine. Therefore, it is important to realistically estimate the possible damage conditions due to underwater explosions in the design stage. The present study applied the Arbitrary Lagrangian–Eulerian (ALE) technique, a fluid–structure interaction approach, to simulate an underwater explosion and investigate the survival capability of a damaged submarine liquefied oxygen tank. The Lagrangian–Eulerian coupling algorithm, the equations of state for explosives and seawater, and the simple calculation method for explosive loading were also reviewed. It is shown that underwater explosion analysis using the ALE technique can accurately evaluate structural damage after attack. This procedure could be applied quantitatively to real structural design.  相似文献