Early-Warning Model of Gas Outburst Hazard in Excavation Roadway Based on Microseismic Parameters
International Journal of Oil, Gas and Coal Engineering
Volume 4, Issue 3, May 2016, Pages: 30-37
Received: Jun. 20, 2016; Accepted: Jul. 1, 2016; Published: Jul. 18, 2016
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Authors
Chao Liu, College of Mineral Engineering, Xi’an University of Science and Technology, Xi’an, People’s Republic of China
Shu Gang Li, College of Mineral Engineering, Xi’an University of Science and Technology, Xi’an, People’s Republic of China
Jun Hua Xue, State Key Laboratory of Deep Coal Mining and Environment Protection, Huainan Mining Industry Group, Huainan, People’s Republic of China
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Abstract
In order to evaluate and give a early-warning about the gas outburst risk during excavation, comprehensive indexes used to evaluate the gas outburst risk are put forward and a gas outburst early-warning model based on the normal distribution function (2σ) is created; a typical working face with gas outburst risk in Xinzhuangzi Mine of Huainan Mining Area is selected as the object of tracking and monitoring, and a microseismic monitoring system is created to track and monitor comprehensively the destruction process, destruction degree, and distribution of the coal mass ahead of the tunnel during excavation; the gas outburst risk is evaluated according to the monitoring data and using the comprehensive gas outburst risk evaluation indexes and early-warning model, and a timely and effective early warning about the gas outburst risk is given; the gas outburst indexes are used to check the effect of the gas outburst risk evaluation and early warning. The results show that the microseismic monitoring technology can provide reference for gas outburst evaluation and early warning; the comprehensive gas outburst evaluation indexes and the early-warning model (2σ) can reflect the variation trend of the outburst risk, accurately and effectively evaluate and give an early warning about the outburst risk during the excavation, and optimize the advance gas drainage drill hole design parameters to improve the gas drainage ratio, thus providing effective guidance for taking risk removal measures and ensuring safe and rapid tunnel excavation.
Keywords
Outburst Hazard, Excavation Roadway, Evaluation Index, Early-Warning Model, Microseismic Monitoring Technology
To cite this article
Chao Liu, Shu Gang Li, Jun Hua Xue, Early-Warning Model of Gas Outburst Hazard in Excavation Roadway Based on Microseismic Parameters, International Journal of Oil, Gas and Coal Engineering. Vol. 4, No. 3, 2016, pp. 30-37. doi: 10.11648/j.ogce.20160403.12
Copyright
Copyright © 2016 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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