Three-dimensional time-lapse velocity tomography of an underground longwall panel

被引：95

作者：

Luxbacher, Kray ^{[1
]}

Westman, Erik ^{[1
]}

Swanson, Peter ^{[2
]}

Karfakis, Mario ^{[1
]}

机构：

[1] Virginia Tech, Dept Min & Minerals Engn, Blacksburg, VA 24061 USA

[2] NIOSH, Spokane Res Lab, Spokane, WA 99207 USA

来源：

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES | 2008年 / 45卷 / 04期

基金：

美国国家科学基金会;

关键词：

rockbursts; longwall; coal; tomography; velocity; stress;

D O I：

10.1016/j.ijrmms.2007.07.015

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Three-dimensional velocity tomograms were generated to image the stress redistribution around an underground coal longwall panel to produce a better understanding of the mechanisms that lead to ground failure, especially rockbursts. Mining-induced microseismic events provided passive sources for the three-dimensional velocity tomography. Surface-mounted geophones monitored microseismic activity for 18 days. Eighteen tomograms were generated and high-velocity regions correlated with high abutment stresses predicted by numerical modeling. Additionally, the high-velocity regions were observed to redistribute as the longwall face retreated, indicating that velocity tomography may be an appropriate technology for monitoring stress redistribution in underground mines. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：478 / 485

页数：8

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