Determination of ejection velocity of rock fragments during rock burst in consideration of damage

被引：27

作者：

Zuo, YJ ^{[1
]}

Li, XB ^{[1
]}

Zhou, ZL ^{[1
]}

机构：

[1] Cent S Univ, Sch Resources & Safety Engn, Changsha 410083, Peoples R China

来源：

JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY | 2005年 / 12卷 / 05期

基金：

中国国家自然科学基金;

关键词：

rock burst; ejection velocity; support design; energy equilibrium; damage;

D O I：

10.1007/s11771-005-0133-7

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The ejection velocity of rock fragments during rock burst, one of the important indexes representing the rock burst strength, is used most conveniently in the supporting design of tunnel with rock burst tendency and is often determined by means of observation devices. In order to calculate the average ejection velocity of rock fragments theoretically, the energy of rock burst was divided into damage consuming energy and kinetic energy gained by unit volume of rock firstly, and then the rock burst kinetic proportional coefficient eta was brought up which could be determined according to the rock-burst damage energy index W-D, at last the expression of the average ejection velocity of rock fragments during rock burst was obtained and one deep level underground tunnel was researched using the mentioned method. The results show that the calculation method is valid with or without considering the tectonic stress of tunnels, and that the method can be a reference for supporting design of deep mining.

引用

页码：618 / 622

页数：5

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