Fiber Optic Temperature and Gas Concentration Sensor for Mine Goaf Area Inner Detecting

Abstract

Spontaneous combustion in coal goaf area is one of major disasters in coal mines. Detection technology based on signature Gas and Temperature is the primary means of spontaneous combustion forecasting of coal goaf area. A real-time remote fire detection system is proposed based on tunable diode laser absorption spectroscopy technology and FBG temperature sensing technology, to achieve valid detect of gas concentration and temperature. The System include fiber mathen concentration sensor and fiber temperature sensor based FBG. The system achieved remote on-line monitoring of gas concentration and temperature in mine goaf, meet the fire forecast need for Coal goaf area. There are obvious advantages Compared with the existing beam tube monitoring system in coal mine.

Coal spontaneous combustion prediction in gob using chaos analysis on gas indicators from upper tunnel

“…So far, the main methods of temperature monitoring in coal mine fall into three classes-sensor temperature measuring, infrared temperature measuring and fiber temperature measuring (Liang and Wang, 2011;Wei et al, 2012). Whether combustion is happening or not could be confirmed by checking the temperature and its variation from sensors embedded in the dump or thermal signals monitored by calorimeters.…”