crushed coal control

  • Experimental study on the permeability of crushed coal

    2021年11月29日  Dukhan and Mohamed 20 investigated the effects of wall surface and size on permeability and shape drag coefficient by laboratory experiments. Cheng 3 presented a capillary-type model on a modified...

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  • Study on the distribution pattern of particle re-crushing in

    2022年1月18日  The test results show that: the crushing of coal rock particles exists in almost the whole compaction process of the crushed coal rock body, and the crushing of

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  • Micro-structure of crushed coal with different

    2020年8月1日  Therefore, from the perspective of the microstructure of coal, the study of the evolution of the chemical structures of coals of different metamorphic degrees in the

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  • Evolution of Broken Coal Permeability Under the Condition

    2019年6月5日  This paper focuses on the effective permeability. The effects of stress, particle size, moisture content, and temperature on the effective permeability of crushed

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  • Effect of particle size on re-crushing characteristics of

    2022年7月1日  Caved zones have been identified as porous media comprising crushed rock and coal of different particle sizes [4]. As the working face progresses, the caved

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  • Secondary oxidation of crushed coal based on free radicals

    2021年4月15日  Coal that had been initially oxidized at 130 °C was the most prone to spontaneous combustion, while that oxidized initially below 110 °C could suppress

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  • Method for prevention and control of spontaneous

    2017年9月1日  Hence, the prevention and protection from coal fires, specifically spontaneous combustion, is of great importance to safe production of mining industry

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  • Experimental Study on Crushing Characteristics of Lignite

    2022年3月31日  The process of spontaneous combustion is primarily influenced by the temperature, oxidation history of coal, coal properties, particle size distribution of the

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  • Coal Crushing and Conveyer System - researchpublish

    project consists of a conveyer belt which helps us in getting the coal directly from the mining area towards the industry. We have also use another conveyer belt for the crushed coal

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  • 中国清洁煤技术:现状和未来前景 - 工程 CAE

    2016年12月27日  煤炭是我国最主要的一次能源,也是最主要的温室气体排放源和大气污染物排放源。. 本文综述了我国煤炭发电、煤炭转化、污染控制及碳捕集、利用和封存四种

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  • Micro-structure of crushed coal with different

    2020年8月1日  As the mining deepens, the coal seam is subject to increased mine pressure and ground stress, and the coal is thus more likely to be crushed (Alexeev et al., 2007; Wang et al., 2016b; Xu et al., 2017; Zhao et al., 2020). Affected by the mining activities, a large amount of spontaneous combustion coal is crushed to generate internal fractures.

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  • Evolution of Broken Coal Permeability Under the Condition

    2019年6月5日  The permeability of crushed coal is not only mainly controlled by coal structure, but also unavoidably influenced by variations of stress, particle size, moisture content, and temperature. ... State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, 174 Shazhengjie, Shapingba, Chongqing, 400030, China.

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  • Sustainability Free Full-Text Experimental Study on

    2020年5月11日  The crushed gangue materials which are filled into the goaf in solid-backfilling coal mining become the main body of bearing the overburden after the tamping process. Its resistance to deformation is the key to control overburden movement and surface subsidence. Particle breakage affects the resistance to deformation of filling

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  • Breakage law and fractal characteristics of broken coal and

    2019年3月25日  State Key Laboratory of Coal Mine Disaster Dynamics and Control, College of Resources and Environment Science, Chongqing University, Chongqing, China. ... particle breakage mainly appeared before the stress reached to 8 MPa while the coal and rock particles were hardly crushed after the stress was larger than 8 MPa. With

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  • Study on the distribution pattern of particle re-crushing in

    1 Introduction. In recent years, the fine view research of bulk filling materials has gradually received attention, and the compaction mechanical properties of bulk filling materials as the key factor of rock control in the coal mining technology of filling directly determine the effect and quality of filling mining [1, 2].The grading structure of the crushed coal body is an

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  • Research on Energy Dissipation Laws of Coal Crushing

    2021年6月21日  The fractal theory relating the coal particle size was developed to calculate the crushing energy of coal. The fractal model and crushed coal particle size distribution data fitted, ... the pneumatic control of driving device was controlled at 0.2∼0.7 MPa, and the corresponding impact speed of the bullet was 3.21∼10.81 m/s. A total of 14 ...

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  • Crack Propagation Characteristics of Coal Samples

    2021年12月7日  Gas drainage is the primary measure to control gas disasters in coal mines. However, more than 70% of the coal seams have low permeability, with a permeability coefficient of (0.001–0.1) × 10 –3 mD in China, which greatl Since then, the HVEP technology has witnessed a rapid development, and the technology has been

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  • Compressive deformation and energy dissipation of

    2016年9月1日  Yanan Sun, Peisen Zhang, Wei Yan, Fenqian Yan, WU Junda. Geology. 2020. In this study, the compressive deformation of crushed sandstone was tested using a crushed rock deformation-seepage test system, and the effects of various factors, including crushed rock grade,. Expand.

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  • Coal Crushing and Conveyer System - researchpublish

    coal crushed so the system will work automatically and man work can be reduced. 2. OBJECTIVE AND SCOPE ... When used as part of a burglar alarm, the electronics in the PIR typically control a small relay. This relay completes the circuit across a pair of electrical contacts connected to a detection input zone of the burglar alarm

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  • Radiation characteristics of natural gamma-ray from coal

    2018年1月9日  Top coal caving simulation test: put 300 mm crushed coal in the funnel, and then tiled 500 mm crushed gangues, the detector height was reduced to 200 mm from the platform bottom plate, the ...

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  • Evolution of Broken Coal Permeability Under the Condition

    2019年6月5日  The permeability of crushed coal is not only mainly controlled by coal structure, but also unavoidably influenced by variations of stress, particle size, moisture content, and temperature. ... State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, 174 Shazhengjie, Shapingba, Chongqing, 400030, China.

    Charlar en Línea
  • Sustainability Free Full-Text Experimental Study on

    2020年5月11日  The crushed gangue materials which are filled into the goaf in solid-backfilling coal mining become the main body of bearing the overburden after the tamping process. Its resistance to deformation is the key to control overburden movement and surface subsidence. Particle breakage affects the resistance to deformation of filling

    Charlar en Línea
  • Investigating the effects of effective stress on pore

    2021年12月23日  The lateral limit compression test of the crushed coal body was designed, and the pore-dominated permeability calculation method was given to reveal the mechanism of the action of the effective stress. ... (XUST001) was homemade, mainly including: axial pressure control part, permeation pressure control part, and data acquisition part; the ...

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  • Investigating the effects of effective stress on pore

    2021年12月23日  The process of deformation and destruction of crushed coal grains can be divided into three stages: when the grains are subjected to a force of 1.2 kN–1.4 kN, the grains may compress each other ...

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  • Research on Energy Dissipation Laws of Coal Crushing

    2021年6月21日  The fractal theory relating the coal particle size was developed to calculate the crushing energy of coal. The fractal model and crushed coal particle size distribution data fitted, ... the pneumatic control of driving device was controlled at 0.2∼0.7 MPa, and the corresponding impact speed of the bullet was 3.21∼10.81 m/s. A total of 14 ...

    Charlar en Línea
  • Properties and Application of Backfill Materials

    2019年1月17日  Coal is the basic resource underpinning energy generation in China, however, constant, large-scale mining of coal results in many problems such as ecological destruction of mining areas. As a result,

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  • Crack Propagation Characteristics of Coal Samples

    2021年12月7日  Gas drainage is the primary measure to control gas disasters in coal mines. However, more than 70% of the coal seams have low permeability, with a permeability coefficient of (0.001–0.1) × 10 –3 mD in China, which greatl Since then, the HVEP technology has witnessed a rapid development, and the technology has been

    Charlar en Línea
  • Compressive deformation and energy dissipation of

    2016年9月1日  Yanan Sun, Peisen Zhang, Wei Yan, Fenqian Yan, WU Junda. Geology. 2020. In this study, the compressive deformation of crushed sandstone was tested using a crushed rock deformation-seepage test system, and the effects of various factors, including crushed rock grade,. Expand.

    Charlar en Línea
  • Coal Crushing and Conveyer System - researchpublish

    coal crushed so the system will work automatically and man work can be reduced. 2. OBJECTIVE AND SCOPE ... When used as part of a burglar alarm, the electronics in the PIR typically control a small relay. This relay completes the circuit across a pair of electrical contacts connected to a detection input zone of the burglar alarm

    Charlar en Línea
  • Radiation characteristics of natural gamma-ray from coal

    2018年1月9日  Top coal caving simulation test: put 300 mm crushed coal in the funnel, and then tiled 500 mm crushed gangues, the detector height was reduced to 200 mm from the platform bottom plate, the ...

    Charlar en Línea
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