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Title: 長壁上炭採掘における支持の採掘圧力に対する緩い上炭の影響
Other Titles: The effects of loose top-coal on the mining pressure of support in longwall top-coal caving mining
Authors: 李, 兆欣1 Browse this author
王, 家臣2 Browse this author
藤井, 義明3 Browse this author →KAKEN DB
児玉, 淳一4 Browse this author →KAKEN DB
福田, 大祐5 Browse this author →KAKEN DB
Authors(alt): Li, Zhaoxin2
Wang, Jiachen3
Fujii, Yoshiaki4
Kodama, Jun-ichi5
Fukuda, Daisuke6
Keywords: トップ石炭
Loose top-coal
Top-coal caving mining
Dynamic load
Issue Date: 15-Mar-2020
Publisher: 資源・素材学会
Journal Title: 資源・素材講演集
Journal Title(alt): Proceedings of MMIJ Annual Meeting
Volume: 8(2020)
Issue: 1(春・千葉)
Abstract: The peak value of mining pressure on hydraulic support is supposed to increase with the mining height in the longwall top-coal caving mining. The supporting pressure of hydraulic support is therefore selected based on the mining height. However, it is also known that the pressure may not significantly increase as expected. This study mainly aims to clarify the effects of the loose top-coal on the reduction of the mining pressure of the hydraulic support for the geological conditions of Jiaozuo Coal Mine in Henan Province, China. A series of dynamic loading tests for loose top-coal, which was simulated by particles having different types and sizes, with different thicknesses, was carried out. It was found that the buffering effect became more prominent for softer or larger particles, or with the thickness within a certain value. The interaction model between the support and loose top-coal was built and the constitutive equations between them were derived. In the analysis using the constitutive equations, it was confirmed that the top-coal became more stable with the stiffness of the support. It was found from the numerical analysis using ANSYS software that the stratification of stress occurred during the propagation of loading in the top-coal and that the buffering effect became better with the thickness within a certain value.
Description: 一般社団法人資源・素材学会 2020年度 春季大会、2020年3月15日~17日、千葉工業大学 津田沼キャンパス、習志野市(開催中止)
Conference Name: 一般社団法人資源・素材学会 2020年度 春季大会
Conference Place: 習志野市
Type: proceedings
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 藤井 義明

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