coal mining displacement sensor

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  • (PDF) Design and Optimization of a Novel Hydro Cylinder

    coal mine, subject to service conditions, is the displacement sensor[14-16], which utilizes the magnetostrictive principle to generate a strain pulse signal through thePredicting roof displacement of roadways in underground,2021-9-16 · Nowadays, most underground coal mines worldwide entered the stage of deep mining, and longwall mining has been widely applied with many technological advances (Sinha and Walton, 2019; Darvishi et al., 2020).In advanced longwall mining, roadways play an essential role in terms of safety and coal production efficiency (Jiao et al., 2013).However, longwall mining allows the roof to collapse once

  • An improved method of three-dimensional displacement

    2021-8-26 · horizontal displacement Generally, the mining direction follows the strike direction, which is perpendicular to the inclined direction, to extract coal easily. Figure 1 illustrates the profile of a mining subsidence basin after the coal mine has been exploited in the strike direction. At this point, the coal seam can be regarded as horizontal.Experimental analysis of control technology and,2021-10-22 · The No. 2 Mining Area of Shitanjing is located in the high mountain area of western Ningxia. The dip angle of coal strata is 18°–27°, with an average of 23°.

  • (PDF) Framework and Application of a Big Data Monitoring

    2019-5-23 · coal mining in which roadways must be excavated before coal mining. This is a major change in coal mining technology and one of the important developments in the sustainable mining of coal resources.Dynamical behavior of coal shearer under the influence of,2021-9-16 · Aiming at the problem of severe vibration and abnormal wear and tear of various components in coal shearer under slant-cutting conditions, a

  • The Research on Characteristics of Hydraulic Support

    2018-1-18 · Mathematical Model of Displacement Sensor. Displacement sensor is an important part of electro-hydraulic servo-positional control system, and its performance directly affects the control accuracy of the hydraulic support position and electro control system. Therefore, the accuracy of displacement sensors should be one more grade higher thanOptical Fiber Frequency Shift Characterization of,2021-9-9 · Research Article Optical Fiber Frequency Shift Characterization of Overburden Deformation in Short-Distance Coal Seam Mining Dingding Zhang ,1,2 Qiang Chen,3 Zhengshuai Wang,4 Jianfeng Yang,1,2 and Jing Chai1,2 1School of Energy Engineering, Xi ’an University of Science and Technology, Xian 710054, China 2Key Laboratory of Western Mine Exploitation and Hazard Prevention, Xi’an

  • Coal Engineering

    2021-9-24 · Coal mine safety production is still the main issue during the "14th Five-Year Plan" period. And relevant suggestions are put forward from the perspectives of government supervision, enterprise risk control and coal mine intelligent construction.Field Distributed Displacement Monitoring of the Coal,2020-10-10 · The roof displacement monitoring of coal mine roadways is the most common means to prevent the roof accident, and is the key to ensure the coal mine safety production. But the sensor to monitor the changes of various physical measurands along the axial direction of the

  • Sensor and Monitoring System for Mining Applications

    2021-10-28 · 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.Predicting roof displacement of roadways in underground,2021-9-16 · Nowadays, most underground coal mines worldwide entered the stage of deep mining, and longwall mining has been widely applied with many technological advances (Sinha and Walton, 2019; Darvishi et al., 2020).In advanced longwall mining, roadways play an essential role in terms of safety and coal production efficiency (Jiao et al., 2013).However, longwall mining allows the roof to collapse once

  • Project > Statistical analysis of coal-silo vibrations

    About this project. At its coal mine near Underwood, North Dakota, Falkirk Mining noticed unusual vibrations occurring in its silo during certain periods. Concerned about the silo’s structural stability, the company asked Barr to investigate the cause. Our structural engineers installed four vibration and displacement sensors at variousAn improved method of three-dimensional displacement ,2021-8-26 · horizontal displacement Generally, the mining direction follows the strike direction, which is perpendicular to the inclined direction, to extract coal easily. Figure 1 illustrates the profile of a mining subsidence basin after the coal mine has been exploited in the strike direction. At this point, the coal seam can be regarded as horizontal.

  • Investigation of Fault Displacement Evolution During

    2019-11-23 · A physical simulation model is constructed to study the characteristics of fault displacement evolution at Yima mining area, Henan Province, China. The geological condition at Yima mining area is complicated with high in situ stress, reverse faults and extremely thick conglomerate rock strata. In this study, the fault movement process during extraction of a coal seam is simulated and theApplication of Distributed Optical Fiber Sensing,2019-7-30 · In recent 20 years, as the depletion of coal resources in shallow strata, coal mining operations have been moving to deeper strata [1]. Approximately 60% of the coal mining works are conducted with a mining depth of over 800m in China [2]. Mining works in deep strata are facing the chal-lenges ofhighground stresses andcomplexgeological condi

  • (PDF) Framework and Application of a Big Data Monitoring

    2019-5-23 · coal mining in which roadways must be excavated before coal mining. This is a major change in coal mining technology and one of the important developments in the sustainable mining of coal resources.Internal Strain Monitoring of Coal Samples Based on Fiber,2021-10-19 · 1. Introduction. Nowadays, coal mining is reaching greater intensity and depth, and compared with shallow mines, the complex mining conditions and the stress state of surrounding rocks have resulted in more and more complicated mechanical characteristics and deformation characteristics of the surrounding rock in deep roadways.

  • Field Distributed Displacement Monitoring of the Coal

    2020-10-10 · The roof displacement monitoring of coal mine roadways is the most common means to prevent the roof accident, and is the key to ensure the coal mine safety production. But the sensor to monitor the changes of various physical measurands along the axial direction of thePredicting roof displacement of roadways in underground,2021-9-16 · Nowadays, most underground coal mines worldwide entered the stage of deep mining, and longwall mining has been widely applied with many technological advances (Sinha and Walton, 2019; Darvishi et al., 2020).In advanced longwall mining, roadways play an essential role in terms of safety and coal production efficiency (Jiao et al., 2013).However, longwall mining allows the roof to collapse once

  • A physical and numerical model-based research on the

    2017-10-19 · The subsidence curve diagrams of strata settlement deformation caused by coal mining (①, ②,,⑥ represent the serial number of displacement sensor in the strata. The settlement curve of each layer is, respectively, obtained from the observation records of the displacement sensors located at the corresponding layer.Coal mine Safety Features Dec 2007 Photonics Spectra,Coal mine Safety. Intelligent optical fiber sensor systems may help reduce the number of mining disasters. Tongyu Liu, Shandong Micro-Sensor Photonics Ltd., and Eric Bergles and William Yang, BaySpec Inc. According to the latest official mining statistics, from 2003 to 2006, more than 20,000 people died from coal mining accidents in China.

  • Fibre optic sensors for mine hazard detection

    bars as strain gauges and long gauge length displacement sensors were developed to monitor the rock displacement. The range of the fibre optic displacement sensor is 0- 200 mm, accuracy of 0.1% were achieved. 2.3. Fibre Optic Micro-Seismic Detection . A fiber optic accelerometer was developed for the detection of micro-seismic events intechnical Monitoring underground coal mining-induced,2014-1-15 · for detecting surface displacement caused by underground coal mining is mentioned. Post-mining subsidence:This example deals with subsidence in an abandoned coal mining area located in Gaeun, Korea, reported by Jung et al. [21]. From November 1992 to October 1998, 25 JERS-1 SAR interferometric pairs were used, and the crack level obtained by a

  • Seismic Monitoring Strategies for Deep Longwall Coal

    2016-10-11 · 4. Implementation of a mine-wide or district-wide network 5. Installation of a dense microseismic network These strategies take into consideration: (1) the variety of potential objectives for seismic monitoring, (2) the notable contrast of coal mining environments with conditions in hardrockUniversity of Wollongong Research Online,2020-7-2 · 2006 Coal Operators’ Conference The AusIMM Illawarra Branch 68 6 7 July 2006 . Seismic sensors . A total of 12 seismic sensors were installed in two locations. 11 of them were installed at the fourth cut-through (4 C/T) where the roof fracturing and damage during mining was monitored in detail. One sensor was installed at the

  • Application of Distributed Optical Fiber Sensing

    2019-7-30 · In recent 20 years, as the depletion of coal resources in shallow strata, coal mining operations have been moving to deeper strata [1]. Approximately 60% of the coal mining works are conducted with a mining depth of over 800m in China [2]. Mining works in deep strata are facing the chal-lenges ofhighground stresses andcomplexgeological condiFully mechanized coal mining technology for thin coal ,2021-7-7 · recovery rate of coal resource and extend the mine lives. With the implementation of the fully mechanized thin coal seam mining technology in highly gassy mines, it can speed up the mining of methane releasing coal seams, achieve a balanced extraction of thick and thin seams and, ultimately, reach the goal of safe mining operations. 2.