Výsledky vyhledávání - "Han Zhicheng"

Akademický článek

Research on reasonable layout parameters of working faces based on the concept of harmonic extraction to reduce the damage of coal seam waiting for upward mining

Autor: Chai Jing, Han Zhicheng, Lv Weiming, Zhu Haitao, Hou Shuhong

Publikováno v: Scientific Reports, Vol 13, Iss 1, Pp 1-15 (2023)

Abstract Based on the idea of harmonic extraction, the problem of reducing the damage of the coal seam waiting for upward mining. Using the theoretical analysis method, a schematic diagram of coordinated mining along the dip direction of coal seam is

Externí odkaz: https://doaj.org/article/9ac700a6618842edb83d924cd03bf072

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Akademický článek

CatBoost mine pressure appearance prediction based on Bayesian algorithm optimization

Autor: CHAI Jing, ZHANG Ruixin, OUYANG Yibo, ZHANG Dingding, WANG Runpei, TIAN Zhicheng, LIU Hongrui, HAN Zhicheng

Publikováno v: Gong-kuang zidonghua, Vol 49, Iss 7, Pp 83-91 (2023)

Obtaining mine pressure data through traditional monitoring methods and using statistical or machine learning algorithms to predict mine pressure can no longer meet the requirements of intelligent development in mines. It is necessary to seek new met

Externí odkaz: https://doaj.org/article/4107cdfe281a46a684a03122f3c3631a

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Akademický článek

Deformation analysis and support optimization of adit surrounding rock under overburden load disturbance

Autor: CHAI Jing, LIU Hongrui, ZHANG Dingding, LIU Yongliang, HAN Zhicheng, TIAN Zhicheng, ZHANG Ruixin

Publikováno v: Gong-kuang zidonghua, Vol 49, Iss 3, Pp 13-22 (2023)

The traditional convergence instrument, 3D laser scanning and other monitoring technologies for the deformation of surrounding rock in the mine roadway can not meet the comprehensive monitoring requirements of complex projects. The technologies have

Externí odkaz: https://doaj.org/article/7a052b4fa2744b11aacfa0d377344628

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Akademický článek

Distributed optical fiber measurement of floor heave evolution in mining roadway

Autor: CHAI Jing, HAN Zhicheng, LEI Wulin, ZHANG Dingding, MA Chenyang, SUN Kai, WENG Mingyue, ZHANG Youzhi, DING Guoli, ZHENG Zhongyou, ZHANG Yin, HAN Gang

Publikováno v: Meitan kexue jishu, Vol 51, Iss 1, Pp 146-156 (2023)

With the deepening of coal mining and the upsizing of mining equipment, the floor heave of the mining roadway has become an important problem that restricts the efficient and safe mining of the working face. It is of great significance to reveal the

Externí odkaz: https://doaj.org/article/6536aa1dda6b455b87bfe101808fb466

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Akademický článek

Roof stability evaluation of large section open-off cut in lower slice of slicing mining

Autor: CHAI Jing, QIAO Yu, GAO Shigang, GAO Dengyan, CHEN Sushe, LYU Qingxu, DU Wengang, HAN Zhicheng

Publikováno v: Gong-kuang zidonghua, Vol 48, Iss 5, Pp 21-31 (2022)

In order to study the roof stability of large-section open-off cut in lower slice of slicing mining, the 14 boreholes in the top coal of the 203 open-off cut in the lower slice of 1−2 coal seam in Huojitu Mine of Daliuta Mine is taken as the resear

Externí odkaz: https://doaj.org/article/aa0824ffd9e94c43a22c1780285e8c4e

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Report

On the Schwartz estimate for Hodge Laplacians on semisimple Lie groups

Autor: Han, Zhicheng

In this paper, we prove Schwartz estimates for Hodge Laplacian and Dirac operators on semisimple Lie groups. Alongside, we gives a version of Kuga lemma for its Lie algebra cohomology. This is a generalization of similar results on symmetric spaces.

Externí odkaz: http://arxiv.org/abs/2404.19091