instrument to detect coal mine

Using BHR to detect coal seam interface in coal mine
2023.2.1 The response characteristics of coal formation interface detected by BHR in horizontal wells in coal mine is quite different from BHR detect in ground vertical hole. The electromagnetic wave velocity of coal seam can be calculated by using the reflected
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A Review of Geophysical Exploration Technology for Mine
2017.6.12 Geophysical exploration can be effective in detecting and monitoring potential sources of coal mine water in-rushes and underground watercourses.
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Instrument Solutions for the Coal Mining Industry
and blend coal. Achieve precise and accurate information through the use of Thermo Scientific coal analyzers, weighbelt feeders, electronic belt scales and sample systems.
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Study of a Small Robot for Mine Hole Detection - MDPI
2023.12.14 China is rich in coal resources, but complex hydrogeological conditions lead to difficulties in coal mining, including coal mine collapses, roof and water damage,
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Using BHR to detect coal seam interface in coal mine
2023.2.1 In this paper, the borehole radar (BHR) is used to detect the coal bedding interface in boreholes along the coal seam.
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Frontiers Recent advances in laser gas sensors for
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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Application of Microtremor Survey Technology in a
2022.11.17 In the known goaf area of the Taiyuan Nanling Coal Mine, a linear observation array was arranged to conduct rolling acquisition, observe the microtremor signal records of the natural field and use the
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Inspection Robot and Wall Surface Detection Method
2023.5.4 It is believed that by constantly improving the system structure and detection method, it can be applied to the actual coal mine air shaft detection in the near future and can be suitable for the detection of
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Early detection of spontaneous combustion of coal in
2011.1.1 Gaseous products of sponcom, such as carbon monoxide, ethylene and hydrogen, are commonly used in coal mines as indicators to reflect the state of the
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Coal mine low power laser methane detection and alarm instrument
The instrument can detect methane concentration, ambient temperature and ambient pressure at the same time. It has the functions of sound and light alarm, historical data
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Sensors and Technologies in Coal Mines Monitoring for Better
Geotechnical instrumentation is an essential aspect of monitoring mines as it helps to identify potential safety hazards and ensure the stability of mine structures and the safety of workers.. These hazards pose a significant threat to the safety and health of workers in the mining industry. To mitigate these risks, coal mines have implemented various
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History in gas detection: Coal Mine Canaries
In the early 19 th century we have the first recorded gas detector or gas tester. They enlisted a person to wear a wet blanket and carry a wick with the end lit on fire. They would move the lit wick along the walls of the
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Methane Sensing for Coal Mining Applications
OEM. Gascard NG is an ideal OEM sensing solution for measuring Methane (CH 4) in Mine gas, having been designed for ease of integration. Available with a 0-5% range for CH4, the sensor features on-board Barometric
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Detection of Coal Mine Fire Using Landsat-8 OLI/TIRS Satellite
2021.8.22 In the present study, a wide range mini IR thermometer with a laser pointer (Model No. 42510) manufactured by EXTECH Instruments is used to detect coal fire temperature in the field. The instrument can measure temperature ranges −50 to 538 °C (−58°F to 1000°F), with an accuracy of ±2 °C and 0.95 fixed emissivity.
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Early detection of spontaneous combustion of coal in underground coal ...
2011.1.1 Jinyuan coal mine. Jinyuan is a state-owned underground coal mine and located in Shandong province. The mine extracts #3 coal seam with longwall mining. The coal in Jinyuan is bituminous and its proximate analysis is shown in Table 4. The seam lies between 365 m to 434 m below the surface, is 2.3 m thick, dips about 14° and is prone to
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Underground transient electromagnetic real-time imaging system for coal ...
2022.11.15 According to the actual conditions of the coal mine and the acquisition time of the transient electromagnetic instrument, the stratum resistivity of coal and rock ranges from 10 −3 to 10 4 Ωm, and the sampling time has a range of 10 −6 s ∼ 100 s, so the range of θ is 1.77245 ∼ 56.04991.
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Coal mine low power laser methane detection and alarm instrument
A mobile methane alarm Internet of things(IOT) system for coal mine based on portable instrument has been developed, which realizes real-time upload of data and cloud analysis, makes the traditional mine gas monitoring and control system powerfully supplemented, greatly improves the detection level of coal mine gas, and has broad application
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Detection of Large Foreign Objects on Coal Mine Belt Conveyor
2023.8.16 An algorithm based on the YOLOv5 model is proposed to address safety incidents such as tearing and blockage at transfer points on belt conveyors in coal mines caused by foreign objects mixed in with the coal flow. Given the tough underground conditions and images acquired with low quality, recursive filtering and MSRCR image
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Simulation Research on Application of Azimuth Electromagnetic Wave
electromagnetic wave logging instrument in coal mine was put forward. ... detect coal seams [1-3]. This has led to the rapid development of measurement-while-drilling equipment,
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Research on Methane Measurement and Interference Factors in Coal
2022.7.27 1. Introduction. The coal mine environment contains flammable and explosive gas, the main component of which is CH 4. When the methane content in the environment is 5% to 16%, an explosion may occur in the case of fire, causing serious accidents [ 1 ]. Accidents caused by methane are often referred to as the “number one
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In situ measurement of water accumulation in overlying goaf of coal ...
2021.3.2 In recent years, frequent mine water disasters have posed a major threat to the safety of coal mining. Detection of goaf water distribution by transient electromagnetic (TEM) methods facilitates the prevention of these disasters (Chen 2015; Kang 2018; Wang and Wang 2017).Different states of underground coal and rocks exhibit certain
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Applied Sciences Free Full-Text Numerical Simulation and
2022.11.8 Mine floods caused by water-bearing collapse columns are one of the most significant types of coal mine disasters in advanced detection. The transient electromagnetic method (TEM), one of the most effective means, can detect the collapse column in coal mines. However, the research on TEM used on the ground is mainly
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Using BHR to detect coal seam interface in coal mine
2023.2.1 In this paper, the borehole radar (BHR) is used to detect the coal bedding interface in boreholes along the coal seam. With gprMax, we analyze the conditions of the top and bottom interface of coal bedding with 100 MHz and 200 MHz BHR at an dip angle of 0°;analyze the response characteristics of the 200 MHz BHR when the dip angle is 15°,
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A Review of Geophysical Exploration Technology for Mine
2017.6.12 Geophysical exploration can be effective in detecting and monitoring potential sources of coal mine water in-rushes and underground watercourses. Generally, in-mine seismic, DC resistivity, and transient electromagnetic methods are used for such purposes in China. However, such technologies can be influenced by many factors, such
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Multi loop magnetisation based method for detecting coal mine
2019.6.9 Multi-loop magnetisation based method for detecting coal mine wire rope defects Hongyao Wang 1*, Jie Tian 1*, Sven Bilen2, Xinli Wu 2, Junying Zhou 1, Guoying Meng 1, Gang Hua 3 1School of Mechanical Electronic and Information Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China.
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(PDF) Design and Application of Intelligent Monitoring and ...
2021.2.1 What's more, coal mining operations cause both quantitative and qualitative impacts on water systems in and around a mining area. Based on Ma Chen (2021), an intelligent system and ...
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Application of controlled-source audio-frequency magnetotellurics ...
2022.6.13 The subsidence or collapse of coal mine goaf has a great impact on the construction of various large-scale projects and the environment, and can threaten the safety of people’s lives. In the present study, CSAMT was used to detect coal mine goaf in China’s Fangzi mine. Anti-interference data acquisition and processing strategies were
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Research of Dynamic Azimuth Gamma Instrument while Drilling for Mine
drilling can be used to detect and identify the roof and floor interface of coal seam when drilling along the coal seam. Fig. 4. Instrument structure and the opening window when shielded 4 Experiment In order to verify the accuracy of the instrument, a rotating test platform is built in the laboratory. Use the
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Computer vision detection of foreign objects in coal processing
2021.6.1 Consequently, in order to reduce labor intensity and improve production efficiency of coal preparation plant, there is an urgent need for a new method to detect and remove foreign objects in coal. In recent years, a growing number of researchers use machine vision and imaging technology in various applications (Altan et al., 2019, Altan
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Research on Methane Measurement and Interference Factors in Coal
2022.7.27 The detection of methane has always been an important part of coal mine safety. In order to improve the methane measurement accuracy in coal mines and to determine the influence of environmental interference factors on the measurement results, we designed a spherical, experimental chamber simulating the on-site environment of an
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