Zobrazeno 1 - 10
of 211
pro vyhledávání: '"Changyou, Liu"'
Publikováno v:
Meitan xuebao, Vol 49, Iss 9, Pp 3745-3758 (2024)
With the aim of addressing the frequent occurrence of water inrush and support crushing (WISC) accidents in the fold structure belt of the Yonglong mining area, this study is conducted against the engineering background of the Guojiahe Coal Mine. The
Externí odkaz:
https://doaj.org/article/208647ae13be4a5d92d0fcfbbb67f267
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-14 (2024)
Abstract To address the technical limitations of automatic coal and gangue detection technology in fully mechanized top coal caving mining operations, the low radiation level radioactivity measurement method is utilized to assess the degree of coal-g
Externí odkaz:
https://doaj.org/article/489c23486e6640f89418d1badd607b1b
Autor:
Jiuyang Ding, Baofei Sun, Yingdong Gao, Juan Zheng, Changyou Liu, Jian Huang, Nannan Jia, Xianglin Pei, Xueyu Jiang, Shanshan Hu, Bing Xia, Yunle Meng, Zhuihui Dai, Xiaolan Qi, Jiawen Wang
Publikováno v:
Ecotoxicology and Environmental Safety, Vol 273, Iss , Pp 116179- (2024)
It has been shown that exposure to hexavalent Chromium, Cr (Ⅵ), via nasal cavity can have neurotoxicological effects and induces behavioral impairment due to the fact that blood brain barrier (BBB) does not cover olfactory bulb. But whether Cr (Ⅵ
Externí odkaz:
https://doaj.org/article/31291bdeffdc4f6c898853aa6e16fbf6
Publikováno v:
Results in Physics, Vol 57, Iss , Pp 107340- (2024)
Two new nitrates Rb3ZnNO3Cl4 and Rb5Na(NO3)4Cl2 have been synthesized by hydrothermal method, and they are crystallized in orthorhombic space group Pnma (no. 62) and tetragonal space group P4/mnc (no. 128), respectively. ZnCl4 and RbO3Cl6 polyhedron,
Externí odkaz:
https://doaj.org/article/7a02f9c963e64bfbb8c5f879346b6a0d
Publikováno v:
Applied Sciences, Vol 14, Iss 10, p 4106 (2024)
Fracture expansion in rock masses can be observed by monitoring the break of contacts between the bounding particles via the discrete element method. The latter’s realization in this study via the PFC2D program tracked the evolution process of the
Externí odkaz:
https://doaj.org/article/ce7216cd52dc4111b8965b83ec3de68e
Publikováno v:
Energy Science & Engineering, Vol 10, Iss 7, Pp 2253-2267 (2022)
Abstract The vertically‐jointed coal seam, especially after water drainage, is easy to lead to large‐area coal wall spalling (CWS). To alleviate the problem, a strut subjected to equivalent central‐concentrated force was proposed for elaboratin
Externí odkaz:
https://doaj.org/article/1722b072ca3e496c9b8d8b47de818391
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-10 (2022)
Abstract This paper analyzes the instability movement characteristics of overburden in shallow thick coal seam mining and its influence on the development and distribution of fault fractures. The similarity simulation experiment and theoretical analy
Externí odkaz:
https://doaj.org/article/a74b86c3672f4e3bab1887fb883822e5
Publikováno v:
Frontiers in Psychology, Vol 14 (2023)
This study investigated the effects of stress on school bullying behaviors among middle school students, and the moderating role of gender and grade level in this relationship. To this end, the Olweus Child Bullying Questionnaire (OBVQ) secondary sch
Externí odkaz:
https://doaj.org/article/4787af34a5744acdb5e3a8ec3b205270
Publikováno v:
Lithosphere, Vol 2022, Iss 1 (2022)
AbstractPre-excavated withdrawal channel (PWC) is an effective means to shorten the withdrawal time of fully mechanized working face and improve the efficiency, safety, and reliability during the withdrawal. However, the key to the success of the wit
Externí odkaz:
https://doaj.org/article/591ddbb8e9e54076a93d93103322a680
Autor:
Fengfeng Wu, Haoyuan Gu, Jian Zhang, Changyou Liu, Xingmin Chang, Mintao Wei, Yufei Jiang, Ping Wang, Peiju Yang, Huaidong Liu, Xin Yu, Hanrui Zhang, Yuxiang Lv, Yuan Chu, Shibao Liu, Zhiqiang Gao
Publikováno v:
Applied Sciences, Vol 13, Iss 16, p 9344 (2023)
To address the challenging issues of large deformation, control difficulties, and susceptibility to failure in the support structure of soft coal roadways, this study utilizes the CVISC block creep model in UDEC software. The model incorporates Coulo
Externí odkaz:
https://doaj.org/article/8f631ed87d134b8ab5922fa14481aaf3