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Journal of Sensors
Volume 2014, Article ID 172016, 11 pages
http://dx.doi.org/10.1155/2014/172016
Research Article

A Gas Monitoring and Control System in a Coal and Gas Outburst Laboratory

1State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
2Faculty of Resources & Safety Engineering, China University of Mining & Technology, Beijing 100083, China

Received 28 May 2014; Revised 21 July 2014; Accepted 23 July 2014; Published 19 August 2014

Academic Editor: Jesus Corres

Copyright © 2014 W. Nie et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Coal and gas outburst is a phenomenon characterized by the ejection of gas and coal from the solid face of a mine. Physical minioutburst experiments are a very important tool for analyzing outbursts of coal and gas. However, few reports have focused on the safety problem produced by gas concentration or the role of gas spread during the physical experiments. In this study, we designed a simple monitoring and control system for the safety of staff during the minioutburst experiments. The results showed that, in the simulation of four dangerous situations, the system based on a sensors feedback loop can monitor the development of gas content in the temporal and spatial domains for the enhancement of accurate warnings. The system also automatically chooses the appropriate ventilation measures to lower the gas content considering different degrees of danger.