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Tem detection of the distribution of coal mine waterlogged

  • The Research of Distribute Temperature Monitoring System

    The lack of mine belt conveyor fire early warning system of the original mainly manifested: Belt conveyor of coal mine special working environment is not conducive to fire warning system installation and repair detection; The roller at work does not stop rotating, Cause fire early warning system can not effectively monitor each idler roller.

  • Effect of Application of Transient - ScienceDirect

    Jan 01, 2011· Key technical problems in the application of TEM in water hazard control in coal mines In water control in coal mines, the effect of TEM application is evident in geophysical exploration of mining districts in coal mines, detection of water passages inducing flooding of mine from water- accumulating abandoned mines, high precision detection of water inrushing structures inducing flooding of mines, integrated detection

  • metal interference correction method of tunnel transient

    The transient electromagnetic method (TEM) has been widely applied in the advanced detection of tunnel water-bearing structures. However, the metal interference of both supports and tools in the tunnel has become a bottleneck that reduces the forecast accuracy of this method.

  • metal interference correction method of tunnel transient

    In recent research, the TEM advanced detection method has been applied with a combination of magnetic resonance sounding methods, which provide decent detection performance (Shang et al. 2018 ). In the practice of tunnel TEM advanced detection, one of the most challengeable issues we are facing is the electromagnetic interference problem.

  • Design and Implementation of Coal Mine Safety using IoT

    applications Coal mine combustion is major safety hazard which is conventionally detected by monitoring characteristic gases such as CO, C2H4 and C2H2.Fiber optic multi gas sensors have been developed which provide advantage of real time in detection, low cross sensitivity and low cost for coal mine combustion detection. C. Light Weight Mash up

  • Open Access proceedings Journal of Physics: Conference series

    of resistivity distribution in different depths of the earth's internal medium [11-12]. By analyzing the resistivity difference between the gob and the surrounding ordinary rock, the distribution characteristics of the coal mining area are defined. 2.3. Geophysical characteristics of goaf in the coal mine

  • Application of Comprehensive Geophysical Prospecting

    And the distribution of mined-out areas and water accumulation in the coal mine are investigated in detail by using the comprehensive geophysical prospecting method of the transient electromagnetic method (TEM) and controlled source audio-frequency magnetotellurics (CSAMT).

  • Quantitative Calculation of Aquifer Water Quantity Using

    Mine water is a menace to coal mining. Mine water quantity is generally detected by drilling in the coal mine roadway, and the disadvantage is high workload and low efficiency. Therefore, transient electromagnetic method (TEM) was proposed, and TEM data was processed to detect the water yield property of a targeted layer in coal mine.

  • Numerical Simulation and Application of Mine TEM Detection

    Sep 01, 2017· Presently, the transient electromagnetic method (TEM) is widely used, which shows good performance in detecting WBCCs in coal mines. However, traditional numerical simulation approaches have failed to be adapted to complicated underground environments affected by roadways, and the application of boundary conditions require a large grid.

  • CN102506940A - Comprehensive detection device and method

    The invention relates to a comprehensive detection device and method of a coal mine fire area environment by introducing a GPS signal, belonging to comprehensive detection of the coal mine fire area environment. The detection device comprises a sensor module, a GPS positioning module and a GPS antenna thereof, a GPRS communication module and a GPRS antenna thereof, a data memory,

  • Research on Monitoring Technology of Influence Range of

    Coal mine underground simulation results show, fracture affected area location distribution is more complicated than expected, there may be a composite area of influence between the horizontally affected area and the vertically affected area[2].

  • Highly sensitive carbon monoxide sensor for coal mine

    Sep 17, 2019· 1. INTRODUCTION. There are a great variety of health and safety hazards in the coal mines, such as water flooding, rock roof collapse, methane gas explosion, and coal mine combustion etc 1.According to the published statistics, the coal mine combustion has been recognized as one of the major hazards in coal mine production, which can be classified as coal spontaneous combustion and

  • Speculum Observation and Trajectory Measurement in Gas

    minable coal seams in the mine, namely, C 5 b,C 6 a, and C c. The dip angle of coal seam is 2 degrees to 10 degrees, and most of them are below 8 degrees with small coal seam spac-ing. The coal seam characteristics are shown in Table 1. 2.2. Drilling Layout. The design technical parameters of C 5 b coal seam gas drainage borehole are shown in

  • Handbook for Methane Control in Mining

    Other coal mine chapters deal with methane emission forecasting and predicting the excess gas from troublesome geologic features like faults. Additional coal chapters contain methane controls for shaft sinking and shaft filling, for surface highwall mines, and for coal storage silos. Major coal mine explosion disasters have always involved the

  • Numerical Simulation and Application of Mine TEM Detection

    Sep 01, 2017· Presently, the transient electromagnetic method (TEM) is widely used, which shows good performance in detecting WBCCs in coal mines. However, traditional numerical simulation approaches have failed to be adapted to complicated underground environments affected by roadways, and the application of boundary conditions require a large grid.

  • Analysis of the Detection Effects in Coal Mine Goaf by

    shielding layer and high lateral resolution, etc. It is sensitive to coal mine goaf and has played good effects in the detection on the coal mine goaf [3, 4]. The Principles of TEM . Transient electromagnetic method (referred to as TEM) is a kind of electromagnetic detection method in time domain.

  • Radiation characteristics of natural gamma-ray from coal

    Jan 09, 2018· The methods used for coal-gangue recognition such as tail beam vibration detection,γ-ray detection, radar detection, cutting force response, infrared detection, and image detection have been

  • Application of Distributed Optical Fiber Temperature

    Fully distributed temperature sensing (DTS) systems via silica fiber are already used in coal mine health monitoring [8], large oil tank reservoirs [9], and long-distance oil and gas pipe leak

  • Emissions from Coal Fires and Their Impact on the Environment

    Early detection and routine monitoring of coal fires are two critical components in strategizing fire fighting efforts and con-trolling these fires. Hot spots (local areas of elevated tempera-tures) are a precursor to impending coal mine fires (Prakash and others, 1997). Temperature profiles across developing hot spots,

  • Quantitative calculation of aquifer water quantity using

    Mar 01, 2017· Mine water is a menace to coal mining. Mine water quantity is detected by drilling in the coal mine roadway, and the disadvantage is the high workload and low efficiency. Therefore, transient electromagnetic method (TEM) was proposed, and TEM data was processed to detect the water yield property of a targeted layer in the coal mine.

  • Theory and Technology System of Green Coal Mining for

    Fig.1 Theory and technology system of green coal mining for mine areas with high confined pressure groundwater 1 The forecast and detection technology of Karst sinkholes Green Mine should be built upon safety production. The main hidden trouble of production safety for Hanxing subjacent coal mining come from the water

  • Anthony Bonventre Bo Deng Luke Figueroa

    Introduction: Coal Mine Fires Coal mine fires are burning deposits of coal. Either human-induced or a result of natural occurrence Human induced: Ignition due to mining operations Naturally occurring: 3 Lightning Forest Fires Spontaneous combustion from heat, sun, water vapor Most extreme case: Coal Mine Fire lasting for over 30 years

  • Monitoring and Safety System For Underground Coal Mines

    temperature, humidity, g ases, low cross sensitivity and low cost for coal mine combustion detection. We report latest development of a multi-gas sensor which has sub-ppm detection sensitivity

  • Study on Environmental Noise of the Mine TEM Detection

    become a common coal mine electrical prospecting methods used [1-3]. This kind of devices have been more widely used in the detection of the spatial distribution of coal faces roof and floor moisture anomalies and in the detection of hidden structure that is water conductible or containing water in roadway excavation heading direction.

  • Optical fiber temperature safety system for coal mines

    Jul 23, 2002· Read "Optical fiber temperature safety system for coal mines, Proceedings of SPIE" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • Gas Sensing Technology Improves Mine Safety - Mar 14 2013

    In both deep and open cast coal mines methane gas is an ever-present hazard. Citys methane and other flammable gas sensors have extensive approvals to the various global mining specifications. Specific regional issues are a further complication, for example, in South African mines, hydrogen cross-sensitivity is a particular concern.

  • Coal Mine Inclined Shaft Advanced Detection Method and

    Coal, as one of the most abundant, widely distributed, and economically used energy sources in the world, takes an important position in the energy structure. Numerous mines are required in coal mining, and as a significant means to improve coal productivity in mining areas, inclined shaft development is adopted by most of the mines.

  • Paper No. 85 ISMS 2016

    generally used to detect. Coal mine detection by TEM and Ground Penetrating Radar (GPR), was detection. 2) The commonly used method of water disaster governance was adit water gravity in South China coal mine. In the aspect of karst water prevention, drainage was the best way to control. Slip-casting was also a better way for controlling karst

  • Distributed optical fiber temperature sensor applied in

    Distributed optical fiber temperature sensor (DTS) for underground coal gasification (UCG) system using is studied in this paper. By measuring temperature of reacting mine gasification process can be controlled. Calibration of DTS and experiment result are introduced. The results show that, DTS can play an important role in UCG systems.

  • Study on fracture shape distribution characteristics and

    In this study, the fracture shape characteristics of a sample coal surface were classified based on the morphological edge detection method, and the shape distribution of the main fractures on the middling coal surface was obtained.

  • Flammable gas detection in coal mines a historical

    Underground coal mines are dangerous places in which to work. This short article explores why, in part, this is so. It also provides conclusions that indicate how a study of one of the hazards encountered, namely flammable gas, and the associated control measures that were developed, may help reduce the risk to modern-day workers.

  • Application of Comprehensive Geophysical Prospecting

    And the distribution of mined-out areas and water accumulation in the coal mine are investigated in detail by using the comprehensive geophysical prospecting method of transient electromagnetic method (TEM) and controlled source audio-frequency magnetotellurics (CSAMT).

  • PAPER OPEN ACCESS Transient Electromagnetic Pseudo

    3 Beijing Mine Safety Engineering Technology Research Center, Beijing, 100013, China *Corresponding authors e-mail: [email protected] Abstract. In order to detect accurate watery goaf distribution and impact area in coal mine, and on the base of Transient Electromagnetic detection for Gushuyuan Coal, Simulation of Seismic

  • Coal Mine Water Hazard Accurate Detection and Efficient

    Shaanxi Key Laboratory of Coal Mine Water Hazard Prevention and Control Technology, Xian, 710077, Shaanxi, China Introduction Water hazards in coal mines mean the phe-nomena that surface and underground water enters suddenly into a mine during construc-tion and production. Water hazard in coal mines is related to factors such as geological

  • Distribution and Bioavailability of Metals in Subsidence

    Sep 22, 2012· Land subsidence in coal mine would change the type of soil so that it influences the distribution and bioavailability of metals. The results show that the total metal concentration was in the range from 0.41 ± 0.26 mg/kg (Cd) to 94.16 ± 12.06 mg/kg (Zn) and Cd was the serious pollution metal. In spatial, the concentration of most metals (except Sb) was highest in perennial waterlogged zone

  • Quantitative Calculation of Aquifer Water Quantity Using

    distribution range of an aquifer can be determined. Then, with the water-filling coefficient of the aquifer, its water quantity can be estimated. The water yield property detection results in the No.4 coal seam goaf of the No.80101 workface in Jude Mine of Shanxi, China, demonstrates that the apparent resistivity of this goaf is less than 3

  • Distribution law of temperature changes during methane

    The temperature distribution in across the whole area of each specimen was obtained via interpolation calculation. The distribution of temperature changes measured using thermography for both sets of coal samples versus time during the two stages at different gas pressures are shown in

  • USING A MAGNETOMETER. FOR INVESTIGATING

    The burning material in an underground mine fire consists of the coal pillars, binder material, and sometimes roof rock. Pyrite is common to all these materials. Temperatures in the burning zone commonly are in the range of 800 to 1000 degrees C, well above the Curie temperature (Chaiken et al 1989). Upon heating above the Curie temperature

  • Temperature inspection system for open-air coal yard based

    Aug 22, 2016· Abstract: To monitor the coal temperature in the open-air coal yard timely and effectively is one of the most important means for the coal mine to prevent its spontaneous combustion [4].According to the characteristics of the open-air coal stack and the requirements of inspection, a temperature patrol measurement system using four rotor unmanned aerial vehicle (UAV) has been

  • Binford ThermDetector 3000

    The dangers that coal mine fires pose to human life should not be underestimated A solution has been reached through the creation of the Binford ThermDetector 3000: Coal Mine Fire Detection System. By utilizing analog light sensors, a digital IR thermometer, and a Hall-effect sensor, it will detect dangerous levels of heat and changing magnetic

  • Detection and delineation of coal mine fire in Jharia coal

    Sep 29, 2018· The coal mine fire can be detected with different techniques such as borehole temperature measurement, thermo-compositional analysis, remote sensing techniques, thermo-graphic measurement and geophysical methods. In this study, various geophysical methods were used to detect the surface and subsurface coal mine fires.

  • Distributed Temperature Monitoring System for Mining

    Belt transportation parts, power distribution transmission parts, cable bridge parts, coal yard, etc. Optical cable laying mode of belt conveyor: Along the belt direction, both sides are laid in a straight line; the key parts (bridge stack, head and tail) are monitored by the constant temperature disk (the length of optical cable is 10m).

  • The Research of On-Line Monitoring System Design for

    With some residual coal and much leaking air in gob area, fire happens frequently in those areas. Thus, it has become one of main factors of restricting mine development. With the technology of optical fiber pyrometer, the monitoring system has been designed for temperature distribution in coalmine gob area. In addition, by combining it with line laying system, power supply system, data


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