WEBJan 3, 2023 · Coal gangue (CG), one of the world's largest industrial solid wastes produced during coal mining, is extremely difficult to be used owing to its combined contents of clay minerals and organic macromolecules. This study explored a novel process of degrading the harmful organic compounds in the CG into humic acid using a biological method .
WEBFeb 15, 2024 · Zhang et al. used YOLOv4 to detect coal and gangue; the mAP and detection speed of Ourv8 were 2% and FPS higher than theirs, respectively. Wen et al. proposed a YOLOv5Swin to detect coal and gangue, with an mAP of % and a detection speed of 147 FPS. However, the detection accuracy is still slightly lower than .
WEBApr 1, 2000 · The main goal of the work was to determine whether a radarbased system could be used to detect coalrock interfaces in order to establish a suitable mining horizon within the coal seam.
WEBFeb 1, 2023 · The geological transparency of working face is the premise and guarantee to realize the intelligent and accurate mining for coal large number of gas drainage holes, water exploration holes and other boreholes are constructed before and during coal mining. In this paper, the borehole radar (BHR) is used to detect the coal .
WEBAug 18, 2023 · Coal spontaneous combustion disasters are one of the most serious types of mine disasters in China at present, posing a huge threat to underground personal safety and coal production operations. In order to prevent and control coal spontaneous combustion hazards and construct an efficient early warning system, this paper presents .
WEBDec 26, 2022 · Another point to note is that large amounts of extracted coal gangue accumulation causes severe damage to ecological environments. Heaps of gangue cause soil erosion, occupy land resources, and pollute water resources and soil resources (as shown in Fig. 4).The waste gangue generated by mining is difficult to handle, is widely .
WEBFound in Bulgaria are some of the oldest gold artifacts known to mankind, in the Varna Necropolis, a collection of graves built between 4700 and 4200 BC. This finding, dating back nearly 7000 years, provides evidence of the first civilization to use gold mining equipment. Some archeologists claim the Sakdrisi site in southern Georgia, which ...
WEBSep 13, 2022 · 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 everincreasing population and industries. However, coal mining has resulted in environmental changes, including deforestation, air, water, soil, and landform deterioration. This study .
WEBSep 1, 2023 · In view of the inconsistency of guided wave energy in distributed acoustic sensing coal mine maps and the difficulty in distinguishing the vibration levels of coal mines, which leads to the poor sensitivity and accuracy of microseism detection, a coal mine microseism detection method based on time–space characteristics and a support .
WEBRadiocarbon dating helped verify the authenticity of the Dead Sea scrolls.. Radiocarbon dating (also referred to as carbon dating or carbon14 dating) is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon.. The method was developed in the late 1940s at the .
WEBOct 1, 2022 · Estimation of soil heavy metal from hyperspectral image and the uncertainty analysis. For soil heavy metal monitoring based on hyperspectral remote sensing, the accuracy is susceptible to image endmember spectrum and soil properties.
WEBIdentify the most commonly use in wildland firefighting. High expansion fluid . Low expansion solution. Low expansion dry . Medium expansion wet . Low expansion solution. Stir and mix hot embers with dirt. Dry mop up. Cut into burning and unburned sections.
WEBAI Detector for ChatGPT, GPT4, Gemini, and more. Scribbr's AI and ChatGPT Detector confidently detects texts generated by the most popular tools, like ChatGPT, Gemini, and Copilot. Our advanced AI checker tool can detect GPT2, GPT3, and with high accuracy, while the detection of GPT4 is supported on an experimental basis.
WEBJun 3, 2021 · A precise estimation of the heavy metal concentrations in soils using multispectral remote sensing technology is challenging. Herein, Landsat8 imagery, a digital elevation model, and geochemical ...
WEBIt is unlikely to detect coal tars, creosotes, pentachlorophenols, or bunker C. It does not detect polychlorinated biphenyls, chlorinated alkenes and alkanes, or explosives. Detection limits are in the 100 to 500 ppm range, depending upon soil and petroleum type.
WEBNov 16, 2020 · The rapid development of industry and agriculture has made soil heavy metal pollution a serious threat to the environment, food safety and health (Zhao et al. 2019). Such pollution not only degr... Use of hyperspectral imagery to detect affected vegetation and heavy metal polluted areas: a coal mining area, China: Geocarto .
WEBThe device is the firstever example of technology that can detect NRN in its vapor phase. In order to probe the soil under a concrete slab for that NRN, a oneeighth inch hole need only be ...
WEBJun 1, 2021 · 1. Introduction. Coal is the main energy source in China and has accounted for approximately 60% of the nation's primary energy production and consumption for many years (Qiao et al., 2019).However, coal mining activities have also caused serious damage to the environment, including from the removal of vegetative covers and topsoils, .
WEBMining tools is a general phrase that refers to all the mining equipment and mining machines used to extract minerals from the earth. Mined minerals appear in almost every consumer product—from cars, to electronics, to jewelry and more. Minerals like uranium and coal are major energy sources that account for 50% of the US's energy supply.
WEBOct 1, 2019 · Other researchers [83] [84][85][86][87] used ML models to segment coal types (classified by different fixed carbon content in coal) [83], geology type (bituminous coal, lignite, sandstone, soil ...
WEBFeb 26, 2024 · The Xinjiang coalfield fire area ranks No. 1 in the world in terms of its area, and it has been burning for nearly a thousand years. According to the results of the fifth coalfield fire area ...
WEBJul 8, 2023 · The front end is a part of the field of soil detection, which is mainly used to monitor, extract and transmit soil temperature and humidity data. In this case, sensors are used in conjunction with serial communiion techniques to determine sensor data capture, and to receive and transmit data using shortcircuit wireless transmission ...
WEBJan 14, 2022 · Xray fluorescence (XRF) is widely used to rapidly detect heavy metals in soil. Spectra processing has been an important research topic to improve accuracy. In this study, 80 soil samples were analyzed by XRF under indoor conditions, where different preprocessing and quantitative analysis methods were compared in terms of prediction .
WEBShovel. Shovel is tool which is used for the purpose of lifting of excavated soil. It is also similar to spade the difference between spade and shovel is the difference in leading edge. The curvature of metal plate of shovel is generally higher when compared to spade so we can hold the soil easily and lifted it.
WEBOnly the QED can do all this: Identifies the type of petroleum hydrocarbon in the sample. In fact the QED can identify up to three different hydrocarbons in one sample in a single 2 second analysis. Gives you the hydrocarbon concentration. Provides accurate results for Coal Tar, total BTEX, GRO, DRO, TPH, sum 16 PAH and BaP in one 2 second test.
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