Fiber Optic Sensors for Coal Mine Hazard Detection
Fiber Optic Methane Gas Sensors Methane (CH 4) is by far the most important gas in coal mine safety monitoring, explosion occurs upon ignition when methane level in air reaches 5–16%.Conventional catalytic-type methane gas sensors contain a sensing resistor element with platinum heater, which will burn in combustible gases and …
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The temperature of Britain's coalfields | Quarterly Journal of
This broad correlation between the two datasets implies that the post-closure flooded temperature of coal mine workings has reached an approximate temperature equilibrium with the surrounding strata. The historical in situ strata temperature data ( Fig. 3 ) report that between 1000 and 1200 mbgl the mean temperature of the mined Coal Measured ...
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Frontiers | Recent advances in laser gas sensors …
In the past decade, gas sensors based on tunable diode laser absorption spectroscopy (TDLAS) have been extensively studied and tailored for use in the coal mine industry because of their advantages of high sensitivity, …
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Distributed FBG Temperature Sensor for Coal Mine Fire …
We have obtained the characteristics of FBG sensor by changing different values of the temperature for detecting the gradual increase in coal mine fire. The …
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A Fiber Bragg Grating-Based Monitoring System for Roof …
A FBG temperature sensor consists of a FBG sensor, stainless steel case, and fiber jumper, ... A novel monitoring system for roof safety control in underground coal mines using FBG sensors has been developed. This system can be used to conduct accurate, reliable, and continuous online monitoring of roadway roof activity, with the help …
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Fiber optic sensors-based intelligent coal mines
The functionalities of the intelligent coal mine proposed include the following: Monitoring of the freezing earth temperature profile in the monitoring holes at the mine construction phase. t.liu ...
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A novel temperature compensation approach of IR gas …
In summary, this study obtained the appropriate heating range of IR gas sensors, established the error optimization model under different ambient temperature …
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Wireless sensor network based fire monitoring in underground coal mines
In this paper, we propose a WSN-based fire monitoring system for underground coal mines using fuzzy logic approach. The sensor nodes are deployed in the underground coal mines for collecting the monitoring data, such as temperature and concentrations of various gases like CO, CO 2 and O 2. These data are input to the fuzzy …
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Research on Methane Measurement and Interference Factors in Coal Mines …
The used temperature and humidity sensor chip is a digital temperature and humidity sensor SHT20 (Sensirion, Stafa, Switzerland). The air-pressure sensor is an XGZP6847, with a relative pressure measurement range of 0–200 kPa, a resolution of 2 kPa, and a working temperature range of −20–100 °C.
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Thermal Environment Control at Deep Intelligent Coal Mines …
Mechanical cooling of the entire mining tunnel, widely used in deep coal mines, has a significant energy-intensive consumption, particularly for intelligent mining tunnels. Therefore, localized cooling would benefit the intelligent mining industry. Current studies on the temperature, relative humidity, and air velocity under localized cooling for …
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Design of Intelligent Temperature Monitoring System Using …
Design of Intelligent Temperature Monitoring System Using ZigBee Network and TMP102 Sensor Technology. Abstract: In recent years, with the rapid development of mechanized …
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Inspection Robots in Hard Coal Mines | SpringerLink
The review of mining inspection robots designed for use in coal mines developed in different countries was performed. The functionality of the robots and – if available – their technical parameters were described. ... The internal sensor of temperature has a diagnos function as regards functioning of the sensors at a …
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High performance and low temperature coal mine gas sensor …
The sensor at room temperature (25 °C) under UV excitation showed an acceptable response (~23%) which makes it possible to use it in coal mines. The response and recovery time of the sensor exposed to 250–1500 ppm CMM at 100 °C operating temperature were 210–57s and 142–241 s respectively.
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Sensor and Monitoring System for Mining Applications
In coal mining sites, due to the presence of moisture content in the coal and its volatile nature, combustion of coal becomes a significant hazard and is required to be monitored at its early stage in order to take appropriate controls to prevent accidents such as fires, explosions, asphyxiation, loss of life, equipment and resources.
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High performance and low temperature coal mine gas …
The sensor at room temperature (25 °C) under UV excitation showed an acceptable response (~23%) which makes it possible to use it in coal mines. The …
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Frontiers | Recent advances in laser gas sensors …
Due to the extremely complex working conditions, various health and safety hazards are present in underground coal mines, which cause economic losses and heavy casualties. Among these hazards, methane gas …
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(PDF) Research and Application of Intrinsically Safe …
Based on the demand for temperature detection in coal mines, the types and implementation principles of commonly used temperature sensors were …
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Recent advances in laser gas sensors for applications to …
operating temperature, and optical power output, which is the ... Laser methane sensor and applications to on-line monitoring of coal mine gas Laser methane sensor Methane(CH 4 ...
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Time Series Modeling of Methane Gas in Underground Mines
In the last decades, the number of disasters and fatalities has considerably decreased mainly due to the remarkable effort made by the mining industry, academia, and governmental agencies to develop new technologies and techniques to monitor and more efficiently control methane gas in underground coal mining operations [5, 40].However, …
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Hybrid CNN-LSTM and IoT-based coal mine hazards
This study aims to develop a prediction model using IoT and hybrid CNN-LSTM for forecasting underground mine hazards. The forecasting model predicts temperature, humidity, and gases based on the sensors' data collected from underground coal mines (Mardonova and Choi, 2018).The prediction model effectively improves …
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Coal Mine Safety Monitoring and Alerting System with …
provided by the temperature sensor, humidity sensor, IR flame sensor, and gas sensor. ... mine roof integrity and dangerous gases in coal mines, fibre optic sensors have been developed and ...
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Design of Intelligent Temperature Monitoring System Using …
In recent years, with the rapid development of mechanized coal mining technology, the types and quantity of explosion-proof combination switches in coal mines are increasing. Based on the analysis of temperature wax Discoloration method, optical fiber technology temperature measurement method, infrared handheld device temperature …
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Monitoring System for Coal Mine Safety Based on Wireless …
Abstract: In view of the problems of explosive, corrosion and accidents in underground coal mine production, this paper designs a monitoring system based on wireless sensor …
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Recent advances in laser gas sensors for applications to …
This invited paper introduces the recent progress and typical applications of TDLAS-based methane sensors, carbon monoxide sensors, and multi-gas monitoring systems in coal mine gas monitoring ...
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Research on Temperature Variation during Coal and Gas …
Nine temperature sensors, labeled T1–T9, were fixed on the x = 205 mm plane of the coal sample to monitor the temperature variation during the outburst (Figure 4). Another temperature sensor (labeled T0) outside of the coal sample box recorded the evolution of the ambient temperature. The time constants of the temperature …
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Application of Gas Monitoring Sensors in …
Therefore, to ensure the safety of underground coal mines, The article lists the principle of operation, mode of operation and applications of various types of sensors for monitoring toxic and ...
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Research on Temperature Variation during Coal and Gas …
Nine temperature sensors, labeled T1–T9, were fixed on the x = 205 mm plane of the coal sample to monitor the temperature variation during the outburst . …
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Data on methane concentration collected by underground coal mine sensors
The data is collected from 28 different sensors placed at various locations around the coal mine. All the attributes except one are numeric, and the examples collected form a time series.
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Sensors and Technologies in Coal Mines Monitoring for …
Seismic sensors are used to detect ground vibrations and seismic activity in coal mines. These sensors can detect the slightest vibrations caused by explosions, machinery, or natural events, such as earthquakes. Seismic sensors are essential for monitoring the stability of the mine and detecting potential rock falls or collapses.
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IoT and LoRa based smart underground coal mine …
The work in Jo et al. ( 2019) integrated Arduino-based sensors, IoT, and cloud computing to build a system to monitor the mine environment, control ventilation and establish emergency communication in an underground mine. This system was installed in the operating Hassan Kishore coal mine, situated in the Mahiwal region of eastern salt …
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