coal mine interferometer

Rescue Monitoring System in Coal Mine Disaster Based on …

In view of the low sensitivity and the poor spatial resolution of the OTDR distributed optical fiber vibration sensing technology used in the underground positioning system of coal mines.

A review on surface deformation evaluation using multitemporal …

Subsidence in coal mines can be of three types, viz. (a) crack, ... Venus surface was mapped by Arecibo interferometer at 70 cm wavelength by Campbell and his co-workers in 1970, and then lunar topography was mapped in 1972 by Irwin I. Shapiro and his co-workers by using radar photography .

Find out if a property is affected by coal mining

Check if you need a mining report. You can search using the Coal Authority's online search service.. You'll need to know the property's postcode and boundaries. You'll get the search ...

Coal Mines in the Industrial Revolution

In 1841 about 216,000 people were employed in the mines in Britain. Most coal was mined in the north and the north-east as well as the Midlands and some parts of Scotland. Due to the difficulties of moving coal many towns and industries were established around the large coal mines. How did coal production increase? 1700 : 2.7 million tonnes

Quantifying Time-Averaged Methane Emissions from …

These coal mines were selected for their large coal production rates and/or previous reports of large methane emissions (SACMS 2011; Frankenberg et al., 2016; Ong et al., 2017; Smith et al. 2017). Here we examine 65 GHGSat-D observations of the coal mine vents taken between August 2016 and December 2018, totalling 13-24 cloud-free

Xinyu Zhao | IEEE Xplore Author Details

Biography Xinyu Zhao is currently pursuing the Ph.D. degree in optics with the North University of China, Taiyuan, China. His research interests include interferometric fiber-optic sensors and high-speed white-light interferometry.

Zhenfeng Gong | IEEE Xplore Author Details

Affiliations: [School of Optoelectronic Engineering and Instrument Science, Dalian University of Technology, Dalian, China]. Author Bio: Zhenfeng Gong received

Locating and Defining Underground Goaf Caused by Coal …

This paper focused on monitoring and modeling the single subsidence basin in coal mining area based on SAR interferometry (InSAR).

Coal mining induced land subsidence monitoring using …

In this paper, the DInSAR technique is used to process the spaceborne SAR data including C band ENVISAT ASAR, L band JERS SAR, and ALOS PALSAR data to derive the …

Quantifying CH4 emissions in hard coal mines from …

Abstract. Intensive coal mining activities in the Upper Silesian Coal Basin (USCB) in southern Poland are resulting in large amounts of methane (CH4) emissions. Annual CH4 emissions reached 448 kt according to the European Pollutant Release and Transfer Register (E-PRTR, 2017). As a CH4 emission hotspot in Europe, it is of …

Combining SAR interferometric phase and intensity …

Abstract. Coal mining usually causes drastic large gradient deformation in the earth's surface in a short period, which leads to the formation of collapse basin or collapse pit. …

High Stability Dual Beam Interferometer Sensor for Non …

As a non-contact photoacoustic sensor, the reflector of one arm of dual beam interferometer sensor is usually composed of the upper surface of the ultrasonic coupling liquid coated on the surface of the sample. The vibration of the outside and the scanning motor cause the liquid level to shake, causing the reflected probe light path to …

Ministry of Coal, Government of India

Other than Coal India Ltd. and Neyveli Lignite Corporation India Ltd., the Ministry of Coal also has a joint venture with Government of Telangana called Singareni Collieries Company Limited. Government of Telangana holds 51% equity and Government of India holds 49 % equity.

ERS SAR interferometry for land subsidence …

The paper presents the results of terrain subsidence monitoring in Poland's Upper Silesian Coal Basin (USCB) mining area using Differential Interferometry Synthetic Aperture Radar (DInSAR)...

Sinkhole occurrence monitoring over shallow abandoned coal mines …

Hard coal has been mined in the region since the 17th century, with commercial mining starting around 1750. Currently, 30 underground hard coal mines are operating in that region, and these produce around 66 million tons of hard coal per year (CBDG, 2016).While the depth of mining was less than 50 m at the beginning of the …

Quantifying Time-Averaged Methane Emissions from …

targeted the vents of three underground coal mines: the San Juan mine in New Mexico, USA; the Appin mine in New South Wales, Australia; and the Bulianta mine in Inner Mongolia, China. These coal mines were selected for their large coal production rates and/or previous reports of large methane emissions.4,15,28,29 Here, we examine …

ShI-12 mine interferometer (Journal Article) | ETDEWEB

Made available by U.S. Department of Energy Office of Scientific and Technical Information ...

Determination of methane content at Maokhe coal mine from curent mining

Mao Khe is the biggest underground coal mine in Vietnam. The coal production is about 1.5 million tons in the year of 2005 and will be increased year by year rapidly.

Qingsong Hu | IEEE Xplore Author Details

Affiliations: [Engineering Research Center of Intelligent Control for Underground Space, Ministry of Education, China University of Mining and Technology, Xuzho

Australian Pacific produces first coal in 17 years at Dartbrook mine

Australian Pacific Coal ASX: AQC) has announced that the Dartbrook Joint Venture has produced coal to surface at the Dartbrook mine in New South Wales – after it was shut for more than 17 years.

Highlighting gas emissions from coal mines into the

The paper presents fire and gas hazards occurring in underground hard coal mines; methods of hazard detection and methods of gas concentration measurement used while monitoring and/or mine rescue ...

First multi-tool exploration of a gas-condensate-pyrolysate …

Mineral-forming processes in the burning coal mining heaps. ... GICCOR type interferometer with ZnSe beam splitter material; sample cell with 5.0 m path length, 0.4 L volume, with Viton gaskets, MgF 2 protective coating, and BaF 2 window material; MCTP-type detector. Prior to the final order, a sample analyser model was taken for a …

Insurance

Coal Mines Insurance is responsible for administering the workers compensation scheme for the NSW coal mining industry. Coals Mines Insurance must ensure there is a supportive and sustainable workers compensation scheme for the coal mining industry workers of today and the future.

Subsidence monitoring in coal area using time-series InSAR …

To monitor the ground deformation due to coal mining, a modified time-series InSAR technique combining persistent scatterers (PSs) and distributed scatterers (DSs) …

Developments in monitoring mine slope stability using …

Data collected from field trials at two open cut coal mines (Drayton, NSW Australia and Moura, QLD Australia), demonstrates that after compensation for atmospheric effects, sub-millimeter accuracy can be obtained over distances of 70-150 meters using the Slope Stability Radar (SSR). The two remaining sources of errors are fretting or weathering ...

Fiber-optic Sensing of Coal Mine Gas based on Fabry

In this paper, According to mine gas accident frequent and the shortages of traditional gas monitoring system, puts forward some eigenvalue fabry-perot interference (EFPI) technology, its spectrum domain to study the mechanism of white light interference demodulation. establishing the wavelength fiber methane sensor system, realized the …

Effect of spraying on coal dust diffusion in a coal mine …

In recent years, coal has comprised more than 50% of China's primary energy resources and is without doubt the principal energy source in China (BP, 2019; Hua et al., 2018; Li et al., 2020b; National Bureau of Statistics of China, 2019; China Electric Power Planning & Engineering Institute, 2019).In order to satisfy the energy demands of …

Geometry of repeat-pass interferometric SAR system. Where …

This study provides an assessment of changes in the terrain topography due to opencast coal mining in the Patratu region of Jharkhand state during the period of 1962-2007.

Temperature-insensitive Fabry–Perot interferometer for microseism

This study proposes an inline temperature-insensitive Fabry–Perot interferometer (TI-FPI) for coal mine microseism sensing based on a cantilever structure. The sensor is fabricated by splicing a section of hollow core photonic crystal fibre (HC-PCF) between a lead-in polarisation-maintaining fibre (PMF) and a multi-mode fibre (MMF) …