Analysis of mechanical properties, permeability and fracturing mechanism of coal samples at different fracturing time of liquid nitrogen [PDF]
, 2023 In order to study the influence of liquid nitrogen cracking time on mechanical properties and permeability of coal samples, the independently developed WYS-800 triaxial gas seepage test device and acoustic emission detection system were used to conduct ...
Hao WANG +5 more
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Prediction method of surface subsidence due to underground coal gasification under thermal coupling [PDF]
, 2023 Underground coal gasification (UCG) is an essential part of the low-carbon green coal mining technology system. The implementation of the “double carbon” goal of the coal industry has brought excellent development opportunities for UCG. However, UCG will
Chao TANG +6 more
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Study on energy dynamic change law in the process of water-contained coal caused by liquid nitrogen freezing [PDF]
, 2023 To study the energy dynamic change law of moisture-contained coal in the process of liquid nitrogen freezing, a self-developed acoustic emission (AE) experimental system for the whole process of liquid nitrogen frozen coal was utilized to analyze the ...
Botao LI +6 more
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Study on evolution law of mechanical properties of coal samples subjected to freezing and freeze-thaw cycles of liquid nitrogen [PDF]
, 2023 The permeability of coal reservoir is generally low in China, how to effectively improve the permeability of coal reservoir is a key and difficult point of coalbed methane exploitation, Liquid nitrogen fracturing technology as a kind waterless fracturing
Dongming ZHANG +6 more
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Advanced characterization of coal microstructure before and after liquid nitrogen cold soaking [PDF]
, 2023 With the development of coal seam fracturing technology, promote the gas extraction by liquid nitrogen cold soaking fracturing coal has attracted widespread attention. In order to study the effect of liquid nitrogen cold soaking on the microstructures of
Dengke WANG, Shumin LIU, Xuelong LI
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Stress distribution law and adherent dross stability of the copper cooling stave with variable slag coating thickness [PDF]
, 2017 A thermal-mechanical coupling model of a copper cooling stave with variable slag coating was founded based on thermal elastic mechanics, and the influence of the gas temperature, the cooling system, the materials of insert bricks, and the properties of ...
LI Feng-guang, ZHANG Jian-liang
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Thermal deformation analysis of copper-steel composite staves [PDF]
, 2016 The improvement in thermal deformation resistance of the copper stave in the bosh area and lower stack area of a blast furnace is the key factor for prolonging the blast furnace campaign life.
CHENG Shu-sen +4 more
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Coupling numerical simulation of flow field,temperature field and stress field in a wide-thick slab continuous casting mold [PDF]
, 2016 Based on a moving boundary approach, a three-dimensional dynamic model is built for 2400 mm ~400 mm wide-thick slab molds by using ProCAST to realize the coupling simulation of flow field, temperature field and stress field.
CHEN Ping-hu +3 more
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Study on mechanical properties and damage characteristics of granite under thermal shock based on CT scanning [PDF]
, 2023 During the exploitation of deep geothermal resources, the thermal fractures of high-temperature rocks are usually induced by the impact of low-temperature fluids to improve the permeability of reservoir rocks.
Jiamin WANG +5 more
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Research on the Non-uniform Temperature Field for Purifying Polysilicon in Large Directional Solidification Equipment [PDF]
, 2015 太阳能资源分布广泛并可无偿获取，使光伏发电成为新型能源的重要发展方向之一。因其发电组件具备建设周期短、安全可靠、布置灵活等优点得到了人们的青睐。硅作为光伏发电主要的基础材料，已占据市场90%以上的份额。冶金法提纯多晶硅具备投产建设速度快、提纯工艺流程短、成本较化学法低等优点，近年来发展迅速，受到国内外的广泛重视。 定向凝固是冶金法的核心。与中小型提纯相比，大型定向凝固的生产效率高，综合成本较低，但固液界面较难维持水平，晶粒不易保持垂直方向上的整齐排列，凝固和退火过程中裂锭的概率也较大，对温度场构建 ...
朱徐立
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