The coal sample used in this work was collected from the run-of-mine coal (−50 mm) in Xiegou coal mine, Shanxi Coking Coal Energy Group, China. The clean coal with density lower than 1.4 g/cm 3 was obtained from float-and-sink experiment, and was crushed and ground to −74 μm to conduct the proximate analysis, ultimate analysis, …Web
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The research on DAQ of coal-gangue recognition can be traced back to the 1960s, mainly including natural gamma ray 1,2, image recognition 3,4, sound signal analysis 5, vibration signal analysis 6 ...Web
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analysis diagram of the gravity from the target point and the repulsion from the obstacle is shown in Figure 9 . Based on the artificial potential field method, the virtualWeb
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Ultimate analysis is the elemental composition of coal: C, H, N, and S. This analysis is very important for gasification processes for three reasons: 1. It enables one to determine the amount of oxidant/steam required; 2. The H/C ratio of a coal determines the H 2 /CO ratio in the product gas; and 3. The amount of sulfur in coal must be known ...Web
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The coal flow, moisture variations and other conditions that can have an effect . on the coal stream or coal characteristics must be reviewed. The number of seams, coal types or blends to be used in the test must be established, and the widest range of ash and sulphur values must be selected. The mechanical sampling system should be inspectedWeb
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The analyzer usually incorporates either Prompt Gamma Neutron Activation (PGNAA) or Pulsed Fast Thermal Neutron Activation (PFTNA) technology, and is designed to mount around an existing …Web
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3.1.2 Construction of intelligent coal mine knowledge map. Through the establishment of information entities, the mapping from the physical space to the digital space is realized. This mapping includes not only physical entities (e.g., coal mining machines, hydraulic supports, and tunneling machines), but also time entities (e.g., roof …Web
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2.2 Image acquisition of coal samples. The first task of a machine vision system is the image acquisition of the objects. Image acquisition can be characterized as the act of capturing the image of an object or scene to recall the condition or identification of the object later on using an image analysis technique.Web
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Li, X.; Yang, Y.; Li, G.; Chen, B.; Hu, W. Accuracy improvement of quantitative analysis of calorific value of coal by combining support vector machine and partial …Web
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Polynomial regression (PR) and support vector machines (SVMs) are frequently used for modeling and prediction. ... [20], and rapid analysis of raw coal properties [1], [21]. In this paper, modeling of the ash content for clean coal is presented based on image analysis. Pictures were taken from above the conveyer belt. Clean coal …Web
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ALS Global provides reliable and accurate coal testing and analysis services to ensure safety, quality control, and compliance in the coal industryWeb
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The routine coal quality analysis methods in a coal-fired power plant are based on national standards of coal quality analysis, such as GB/T 213-2008 [], GB/T 214-2007 [] and GB/T 30732-2014 [], which require a long time and tedious procedure to obtain the value of ash, volatile and calorific value for a single sample.The lag in test results …Web
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The TGA801 Thermogravimetric Analyzer determines weight loss, including moisture, ash, volatile content, and Loss-on-Ignition (LOI), in various organic, inorganic, and synthetic materials. Weight change is measured as a function of temperature as samples are exposed to a temperature program in an atmosphere-controlled environment.Web
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Laixin Clean Coal Company uses a spiral sorting machine to sort +0.8 mm fine coal ore, which can effectively improve the sorting accuracy of heavy medium coal selection and reduce production costs (Wang and Wei Citation 2006). A coal preparation plant in Shanxi used a two-stage spiral separator to separate the flotation tailings of No. 1 …Web
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The risk of coal mine accidents rises significantly with mining depth, making it urgent for accident prevention to be supported by both scientific analysis and advanced technologies. Hence, a comprehensive grasp of the research progress and differences in hotspots of coal mine accidents in China serves as a guide to find the shortcomings of …Web
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Intelligence is the inevitable direction of mining development in the future (Li, 2017; Liu, 2017; Yu et al., 2019).Statistical analysis of the main automatic and intelligent working face at home and abroad shows that the technology of automatic recognition of coal and gangue is still the technical bottleneck of the development of intelligent top coal …Web
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In laboratory analysis, first, fresh coal blocks were collected underground with their outer pre-oxidized layers stripped in inert gas, crushed, and put in a coal sample tank where they were allowed to desorb gases in a natural state . After 24 h, the components and concentrations of desorbed gases were analyzed by a gas …Web
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The machine can process about 800-1200 particles per . ... Traditional coal washability analysis is determined by conducting float–sink test, which is time consuming, destructive, and uses ...Web
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Since then, coal analysis research using LIBS has been progressively carried out in both laboratory and industrial sites with reported literature from Australia [7], [8], ... Laser induced breakdown spectroscopy machine for online ash analyses in coal. Spectrochim. Acta B, 63 (2008), pp. 1177-1182. View PDF View article View in Scopus …Web
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Malvern Panalytical delivers tailored analytical solutions to control ash percentage in coal, to monitoring deleterious elements and moisture and to predict graphitization or calorific …Web
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Coal plays an indispensable role in the world's energy structure. Coal converts chemical energy into energy such as electricity, heat, and internal energy through combustion. To realize the energy conversion of coal more efficiently, coal needs to be identified during the stages of mining, combustion, and pyrolysis. On this basis, different …Web
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The analysis shows that the autonomous cutting scheme of the shearer for smart mining 4.0 could cut more coal, produce a higher recovery efficiency, and improve production. ... Xie J, Yang Z, Wang X et al (2018) A virtual reality collaborative planning simulator and its method for three machines in a fully mechanized coal mining face. …Web
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Coal plays an indispensable role in the world's energy structure. Coal converts chemical energy into energy such as electricity, heat, and internal energy through combustion. To realize the energy …Web
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(a) & (b). A typical LHD machine at the workshop and during the repair action. Before performing the reliability analysis, each machinery must be categorized into several subsystems for identifying potential failure modes [].Theses categorizations were made based on past historical records like day-to-day worksheets maintained by …Web
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The four elements (man, machine, environment, and management) in the coal mine and their synthesis are calculated and analyzed by using the Matlab tool and the BP neural network program. The predicted value of the personnel intrinsic safety value is (0.86–0.85). The intrinsic safety value of the equipment is (0.93, 0.95).Web
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The most common coal analysis is proximate analysis. It is used on coals during exploration, mining, and preparation. Four different parameters are measured from one sample in a proximate analyzer, …Web
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Statistical analysis has shown that a thicker coal seam leads to more coal bursts and higher coal burst intensity. The change in coal seam thickness has a significant influence on the occurrence of coal burst events. ... As shown in Figure 3, with the advance of the working face or the cutting machine, the influence zone of front abutment ...Web
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Coal analysis is of great importance to improve coal combustion/utilization efficiency and operation safety and to reduce pollution. In this work, we develop a LIBS …Web
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These tests determine different parameters, and the results from Proximate Analysis determine the rank of Coal and some important indicators related to the commercial value of coal, like heating/Calorific value and application in boilers. Spectro Analytical Labs Pvt. Ltd. conducts testing of Coal, Coke and other fuels as per various national ...Web
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PGNAA or PFTNA coal analyser and software that measure sulfur, ash, moisture, calorific value to control coal quality and blend consistency in coal mining and production. …Web
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Aiming at the typical faults in the coal mills operation process, the kernel extreme learning machine diagnosis model based on variational model feature extraction and kernel principal component analysis is offered. Firstly, the collected signals of vibration and loading force, corresponding to typical faults of coal mill, are decomposed by …Web
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China is a major energy-consuming country and its energy reserves are characterized by limited amounts of oil, low amounts of gas, and relatively abundant coal resources (Zhang et al. 2021a, b), and coal dominates the energy production and consumption chain in China.The main energy structure in China over the past decade is …Web
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