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The results showed that coal mine area along with the damage that occurred in it can be detected from multitemporal Landsat data using NDSI value based change detection method The area damage due to coal mining activities can be classified into high moderate and low classes based on the mean and standard deviation of NDSI changes ΔNDSI
Abstract Underground coal mine environmental monitoring is required to ensure and maximize the safe working conditions in mines For safety monitoring there is a need to develop an active communication and information network that will be able to detect quickly and efficiently the mine environmental condition and take necessary actions to warn the workers about the
A novel index to detect surface coal mines is presented and the average accuracy of the proposed method over the season is found to be ${%} and the proposed index can be further used for classification and area monitoring of opencast coal mine regions Detection classification and monitoring of surface mining region from satellite images have vast
·The Jiangjun Gobi No 1 open pit coal mine is situated in the Kalamaili fault zone and is characterized by a high groundwater content In certain mining sites within the study area the inflow of
Meanwhile the model mine intrinsically safe bolt nondestructive detection instrument was developed that can be applied to field measurement A test system was also designed for the calibration of nondestructive testing results on characteristic length and axial load of bolts
·Coal Mines Abhishek Kumar Tripathi Mangalpady Aruna N R N V Gowripathi Rao and Shashwati Ray There are various techniques and instruments are available to detect the presence of above said gasses CH 4 can be detected using Flame Safety Lamp M S A D 6 Methanometer Automatic Fire Damp Detector Methane Monitor MEMACS
·Knowing these results can help extend the life of the mine because coal suppliers can mine lower quality coals and then blend coals of varying quality together to meet customer requirements In fact quality coal blends that meet specific needs can help the environment and the bottom line Boiler efficiency can be increased when they are fed a
·world s main coal mining regions The top four regions are China which in 2011 accounted for just under 50% of world coal production the USA with a 14% share India which accounts for 6% and Europe 4% Methane is arguably the most dangerous gas in mining present both in the mines themselves and also in coal washeries
Prevention and control of coal spontaneous combustion are key to coal mining and storage Existing technologies for the detection of coal spontaneous combustion have limitations but coal spontaneous combustion creates some serious disasters in areas of the world where coal mining and/or storage exists New technologies to detect coal spontaneous combustion are urgently
·Coal mine fire is a severe problem causing environmental degradation and substantial economic loss in coal producing countries of the world Geographic distribution of coal fire affected countries are USA China India Russia Indonesia Venezuela Germany Australia and South Africa and at a small scale in Germany Romania etc Mishra et al 2020; Pandey
·Coal mines has the maximum mining subsidence due to the irregularities of filling of sand in the mines after the over exploitation of coal DInSAR technique is the most efficient and precision giving technique to measure the subsidence in this technique we can detect the mm level changes in the land formation
·Several successful implementations of WSN based monitoring systems have been reported such as early detection of fires in coal mines and detection of toxic mine gases in the environment
·Geophysical and intrusive site investigations to detect an abandoned coal mine access shaft Apedale Staffordshire UK Banham Banham School of Physical Sciences & Geography William Smith Building Keele University Keele ST5 5BG UK Search for more papers by this author
·Since 1840s the Fangzi coal mine in China has been successively mined and the locations of many goaves are unclear Zhang et al 2019a; Zhang et al 2019c To reduce and prevent geological disasters caused by coal mine goaf accurate detection of the goaf location is vital However the Fangzi coal mine is located in the Yishu fault zone
·ABSTRACT Underground coal fires occur normally under inaccessible dangerous steep hills As a light weight and cost effective equipment unmanned aerial vehicles UAVs based thermal infrared TIR imaging technique provides a choice to safely timely and accurately map characteristics of coal fires which is difficult to realize using the conventional
·Electromagnetic non destructive testing/evaluation is an important means for assessment of the performance of chairlift ropes in a mining installation The visual method produces the possibility of inadequate inspection due to its subjectivity Magnetic flaw detectors which measure loss of metallic area LMA and detect local faults LF such as broken wires
·Design and Realization of E MWD Instrument in Coal Mine Lian Jie 1 Published under licence by IOP Publishing Ltd In order to ensure safe and efficient coal mining it is usually necessary to construct a large number of gas drainage holes and water exploring and drainage holes in the coal mine Rotational state detection of
·China is the largest producer and consumer of coal in the world The extraction of coal is increasing intensively to meet the needs of the ever increasing population and industries However coal mining has resulted in environmental changes including deforestation air water soil and landform deterioration This study investigates the impact of mining on the
·Blasting operations used within mines can cause large volumes of carbon monoxide to occur alongside hydrogen sulphide Mine gas presents as both a liberated gas in fissures and an absorbed gas on the inner surface of coal When mine gas is released within mining operations a hazard is posed due to its flammability
·Personnel detection in a coal mine is of great significance for monitoring the safety and real time positioning of underground personnel However the uneven illumination large dust imaging noise and other factors give the existing methods a high false detection rate for personnel detection To overcome this problem an improved YOLOv4 network for
·Instrument Based on PIC Single Chip Abstract In order to automatically monitor the gas concentration in the mine in real time ensure the safety of coal mine production and protect the life safety 3 sensor to detect the gas
·The Airflow Developments AM5000 Reproduced by kind permission of Airflow Developments Limited
·Meanwhile the model mine intrinsically safe bolt nondestructive detection instrument was developed that can be applied to field measurement A test system was also designed for the calibration of nondestructive testing results on characteristic length and axial load of bolts Roadways in coal mining districts from development to
