Characteristics of surface ground motions induced by blasts in jointed rock mass

被引：107

作者：

Hao, H

Wu, YK

Ma, GW

Zhou, YX

机构：

[1] Nanyang Technol Univ, Protect Technol Res Ctr, Singapore 639798, Singapore

[2] Minist Def, Lands & Estates Org, Singapore 109679, Singapore

来源：

SOIL DYNAMICS AND EARTHQUAKE ENGINEERING | 2001年 / 21卷 / 02期

关键词：

D O I：

10.1016/S0267-7261(00)00104-4

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

An in-situ experimental program in a jointed rock mass was designed and implemented to investigate the rock joint effects on stress wave propagation. Accelerometers were placed on rock surface along three lines at 0, 45 and 90 degrees to the predominant rock joint strike direction. Eight blasts were detonated in a charge hole drilled in the rock mass. The equivalent TNT blast weight ranged from 2.5 to 50.0 kg and the loading density (charge weight divided by the charge chamber volume) varied from 1 to 20.0 kg/m(3). A fully coupled detonation with a charge weight of 25.0 kg was also exploded to study the coupling effect. The recorded data are presented and analyzed in this paper. The effects of rock joints on characteristics of stress wave propagation such as peak value attenuation, spectrum, and spatial variations are discussed. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：85 / 98

页数：14