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coal gangue theory

Deformation response of roof in solid backfilling coal mining based on ...

Mar 1, 2021The main lithology of gangue materials is mudstone with a particle size range of 0-30 mm, an average density of 1420 kg/m 3 and a moisture content of 0.4% from Pingdingshan Coal Mine. The gangue size distribution is shown in Table 1 by using the standard size griddle. The X-ray diffraction (XRD) results show that mudstone mainly consists of ...

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An Efficient of Coal and Gangue Recognition Algorithm

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): The separation for coal and gangue is an important process in mine production. In order to automatically select the gangue, this study obtained the difference and distribution regularity of the grayscale distribution by analyzing a large number of image data. By improving Bayesian Decision theory, identifiably ...

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Analysis and Engineering Practice of Factors Affecting Top-Coal ...

6 days agoThe top coal and gangue can reach the coal discharge port at the same time, assisting in recovering the top coal and improving control of the support to the roof. 4. ... "Study on relationship between coal caving step distance and top coal caving recovery rate based on ellipsoid theory," Coal Science and Technology, vol. 43, no. 5, pp. 51 ...

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CDEM simulation of top‐coal caving characteristics under synchronous ...

Jul 1, 2022The dynamic development of the draw body, coal-gangue interface, and distribution of the top-coal velocity field was obtained through CDEM simulation. In addition, the top-coal drawing efficiency and recovery ratio under SMWD were analyzed. Furthermore, a field test of SMWD was conducted in the 8222 automatic LTCC panel of the Tashan Coal Mine.

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Radiation characteristics of natural gamma-ray from coal and gangue for ...

Recognition of coal and gangue (roof rock) is a key technology to realize fully mechanized top coal caving automated mining. ... H. W. Application of fractal theory to top-coal caving. Chaos ...

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thermal coal specifications - thermal coal specifications online ...

Coal Fuel Vertical Electric Thermal Oil Boiler For Wood, High Pressure Quick Details: Model Number: Thermal oil boiler Heat transmission: Radiative, convection Pressure : Both low and high pressure Applications: Carbon, Wood, Metal, Coating, Construction, Air-condition, Electric Specifications: Place of Origin Jiangsu, China (Mainland) Brand Name Olymspan Model Number Thermal oil boiler Fuel ...

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Stability sensitivity for a cable-based coal-gangue picking robot based ...

Nov 24, 2021The coal-gangue picking robot proposed in the present work is a cable-based parallel robot, whose end-effector is set as an end-grab . And therefore, the end-grab can move in any direction freely by extending or retracting cables. ... and calculation of grey correlation degree. 29 Based on grey relational theory, the stability of the robot ...

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Evaluation of Particle Size Distribution of Coal Gangue through Fractal ...

The results indicate that when the value of D is between 1.89 and 2.63, coal gangues are well graded. The use of a fractal method can help to avoid errors associated with calculating grading parameters (C u and C c) in traditional theory, and the fractal dimension D can also be used to evaluate the compactability of coal gangues and other bulk ...

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Coal gangue image segmentation method based on edge detection theory of ...

Jan 7, 2022Aiming at the difficult problem of coal gangue image segmentation in complex backgrounds, this paper proposes an image segmentation method based on the edge detection theory of the star algorithm. The pixel matrix is extracted one by one in the X and Y directions of the coal gangue image, and the central pixel of the matrix satisfying the ...

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Mineral processing - Wikipedia

Industrially, the most common dense media is a suspension of fine magnetite and/or ferrosilicon particles. An aqueous solution as a dense medium is used in coal processing in the form of a belknap wash and suspensions in air are used in water-deficient areas, like areas of China, where sand is used to separate coal from the gangue minerals.

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Vibration Response Analysis of the Tail Beam of Hydraulic Support ...

Jan 19, 2022The vibration response method is currently one of the most effective methods for coal gangue identification. In the process of top coal caving mining, coal and gangue will impact the tail beam of hydraulic support. Due to the difference in the nature of coal and gangue, the effects of coal and gangue impacting on the tail beam are different.

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Electromagnetic wave forward modeling of coal-gangue mixed model in top ...

Jun 28, 2022The automatic control of top coal caving is of great significance to realize intelligent coal mining. In the process of top coal caving, a coal-gangue mixed area containing coal, gangue, and air is formed at the tail beam of the hydraulic support, which has different electromagnetic parameters, different volumes, and different shapes.

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Environmental Problems of Coal Gangue Air Storage in Pingdingshan ...

According to the component character of the coal gangue, the approaches to the coal gangue utilization, such as fuel substitute, building materials, chemical industry products, agriculture fertilizers, filling materials, were expressed in this paper. The measures of coal gangue development and utilization have double meanings of environmental...

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An experimental study of the influence of lithology on compaction ...

The production of coal inevitably results in the accumulation of huge amounts of waste ... 2015 Surface subsidence control theory and application to backfill coal mining technology ... 2012 Simulation experiment of overlying strata movement features of longwall with gangue backfill mining. J. China Coal Soc. 37, 1256-1262. Google Scholar. 16. ...

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Application of Rough Set Theory in Coal Gangue Image Process

：. A novel application of rough set theory in the coal gangue image process is introduced in this paper. Based on rough set theory, the coal gangue image process strategy is proposed to select the coal gangues out from coal bulks on the coal belt transporter. The rough set knowledge representation theory are described, and the coal ...

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On the Equivalent Position Workspace for a Coal Gangue ... - NASA/ADS

Coal gangue separation is of key important for green mining. Robotic separation of coal and gangue based on the machine vision system, which is called a coal gangue picking robot with a gangue grab driven by four cables, is developed in this study. Here, this paper focuses on the equivalent position workspace, within which a coal gangue picking robot possesses the identical stability, to find ...

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Assessment of heavy metal in coal gangue: distribution, leaching ...

In the process of excavation and utilization of the coal gangue hill, gangue at different weathering degree was exposed to the environment, which can be harmful to the surroundings. In order to find the law of heavy metal release and to evaluate the potential ecological risk, five kinds of coal gangue at different weathering degrees were ...

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Chemical reagents in the mineral processing industry

A number of on-stream coal slurry analyzers are presently being developed and commercialized for measuring ash and solids in coal process streams, particularly around flotation circuits. ... This book presents the analysis of a wide range of problems in the process theory of flotation columns, including the first published analysis of models of ...

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Coal and Gangue Separating Robot System Based on Computer Vision ...

Feb 14, 20211. Introduction. In coal production, the raw coal mined directly from coal mines contains a lot of gangue, which contains a lot of heavy metals, and affects the calorific value of coal, causing serious pollution to the environment [].Therefore, it is essential to separate coal and gangue to make them play their respective roles [2,3].As an important part of the coal industry, coal gangue ...

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Synthesis of low-temperature, fast, single-firing body for porcelain ...

Coal gangue is a major industrial solid waste in China, causing great environment pollution. According to phase diagram theory, a low-temperature, fast, single-firing body mix for porcelain stoneware tiles was designed in the quaternary system CaO--MgO--Al₂O₃--SiO₂, using coal gangue as the main raw material.

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Application of Rough Set Theory in Coal Gangue Image Process - INFONA

A novel application of rough set theory in the coal gangue image process is introduced in this paper. Based on rough set theory, the coal gangue image process strategy is proposed to select the coal gangues out from coal bulks on the coal belt transporter. The rough set knowledge representation theory are described, and the coal gangue image processing operations such as the denoising ...

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Easy to use Fertilizer/Coal Gangue Briquette Making Machine - Alibaba

Easy To Use Fertilizer/coal Gangue Briquette Making Machine, Find Complete Details about Easy To Use Fertilizer/coal Gangue Briquette Making Machine,Fertilizer Briquetting Machine,Coal Gangue Briquetting Machine,Easy To Use Briquetting Machine from Briquette Machines Supplier or Manufacturer-Shanghai Yuke Industrial Co., Ltd.

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Accuracy in Systems with Secondary Beneficiation

Secondary enrichment systems are known in the theory and technology of mineral resource processing, but in the case of coal beneficiation, they are used relatively ... and gangue. In the case of ...

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Etal and˜theoretical study on˜kinetic behaviour of˜coal gangue and˜raw ...

gangue and˜raw coal using model reconstruction Bei Li 1 · Gang Liu 1 · Weili Sun 2 · Lili Ye 1 · Mingshu Bi 1 · Wei Gao 1 Reiv: 4 A 2020 / Accept: 6 Oct 2020

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Dynamic response of a coal rock caving impact tail beam for ... - Nature

Jul 7, 2022Zhang Ningbo et al. 18 proposed the method of measuring and identifying the mixed gangue at the coal caving opening in the process of top coal caving by using the natural ray of the coal gangue.

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Researching | Fast Location of Coal Gangue Based on Multispectral Band ...

Coal gangue is identified by machine learning algorithm, and then manipulators or pneumatic devices are used for the separation of coal gangue from coal, which is called intelligent separation of coal gangue. ... Three optimal combination bands are selected from 25 bands for coal gangue detection research by the OIF theory, which can ...

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Dynamic Response Analysis of the Coal Gangue-like Elastic ... - Hindawi

the collision and contact behavior between the coal gangue particles and the hydraulic support in the top coal caving process will trigger the vibration of the hydraulic support and the disorderly collision in the coal gangue rebound process, which is of great significance to clearly understand the dynamic behavior of the hydraulic support in the .

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The use of modified coal gangue for the remediation and removal of ...

Jan 15, 2021Thermally activated coal gangue and lanthanum-modified coal gangue were prepared by thermal activation and hydrothermal methods, respectively. Their struct ... (Fig. S2c, d). The surface areas obtained by application of the BET theory to the nitrogen adsorption isotherms were 9.002 m 2 ·g −1 and 122.231 m 2 ·g −1, respectively, for TACG ...

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Coal gangue image segmentation method based on edge detection theory of ...

Jan 7, 2022Combining the edge detection method of the star algorithm with the morphological method, the fine segmentation of the coal gangue image is completed. The segmentation results are based on the...

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Effect and mechanism of coal gangue concrete ... - ScienceDirect

Aug 2, 2021(1) (1) m c = ρ c × m t × 0.4 ρ g where m c is the mass of coal gangue, m t is the mass of total coarse aggregate, ρ c is the density of coal gangue, and ρ g is the density of gravel. The basic mix proportion of CGC is listed in Table 2.

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Synergistic analysis of co-combustion of sunflower straw and coal gangue

The thermochemical properties of coal gangue, soybean straw, sawdust, and mixtures prepared with different proportions were determined by thermogravimetric analysis. Zhou et al. (2017) found that the ignition performance and thermal reactivity of coal gangue could be improved by adding biomass.

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Selection of herb species for ecological restoration of coal gangue ...

Result The artificially introduced Medicago sativa and Astragalus dahuricus can adapt well to the habitat of the coal gangue pile, and maintain an advantageous position in the vegetation community on the reclaimed slope, with a life cycle of more than 7 months, the maximum sub-coverage of 33.93% and 17.59%, but from June to September, the cover ...

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Novel Process for Alumina Extraction via the Coupling Treatment of Coal ...

A novel process for the coupling treatment of coal gangue and red mud is reported. Red mud containing 23.4% Alâ Oâ, 19.1% SiOâ, and 9.4% Naâ O by weight was used as the blended ingredients of coal gangue for alumina extraction.

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An Efficient of Coal and Gangue Recognition Algorithm - CORE

By improving Bayesian Decision theory, identifiably character Bayesian Discriminant algorithm was proposed to get grayscale division threshold of coal and gangue. Aimed at the problem that impurities gangue and vitrinite in coal affect the accuracy of recognition result, mean smoothing filter algorithm was used to pre-process image and related ...

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Water absorptivity and frost resistance performance of self-ignition ...

Coal gangue (CG) is a type of waste produced during the coal mining process, which wifely stacks around ore fields. The CG stacks are prone to self-ignite because of combustible component in CG, and self-ignition coal gangue (SCG) is generated.

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Separation of gangue from coal based on histogram thresholding -

Xian-min Ma and Che Liang, "Application of rough set theory in coal gangue image process", Fifth International Conference on Information Assurance and Security, pp. 87-90, 2009, IEEE [5].

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ORCID

Jun 13, 2022Coal-gangue Mixture Degree Recognition Using Different Illuminant Method in Underground Coal Mining Optics InfoBase Conference Papers 2019 | Conference paper

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Simulation and optimization of mining-separating-backfilling integrated ...

Mar 29, 2022The main difference between this new technology and the traditional mining technology is that the raw coal separating equipment is moved from the ground to underground to realize the near-zero emission of gangue. China's coal mining technology has experienced a range, from cave mining to underground mining and ground coal dressing (Xia and Wang ...

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Numerical and theoretical investigations of the effect of the gangue ...

May 3, 2022Gangue-coal column theory (Zhang et al. 2018a, b) is adopted here to analyze theoretically the development of the top-coal boundary. In Fig. 3 a, we consider two regions at different places on the hydraulic support (both of which have base areas of δ ). The gangue and coal above these two regions are in two columns.

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Self-Combustion-Depolymerization Approach to Activate Solid-Waste Coal ...

Aug 16, 2022Starting from microspherical precursors composed of SCD-activated coal gangue, FCC catalysts (SCD-Y) bearing in situ -generated Y zeolites with a relative crystallinity of ca. 50% can be readily fabricated via hydrothermal synthesis. SCD-Y shows much higher catalytic activities toward heavy oil cracking than conventional catalysts.

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