The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 28, 2021
Filed:
Oct. 08, 2019
China University of Mining and Technology, Jiangsu, CN;
China Mining & Civil New Material Science and Technology Ltd., Jiangsu, CN;
Boxia Mining Technology Ltd., Jiangsu, CN;
Xiangyu Wang, Jiangsu, CN;
Jianbiao Bai, Jiangsu, CN;
Junwu Xia, Jiangsu, CN;
Shuai Yan, Jiangsu, CN;
China University of Mining and Technology, Jiangsu, CN;
China Mining & Civil New Material Science and Technology Ltd., Jiangsu, CN;
BOXIA MINING TECHNOLOGY LTD., Jiangsu, CN;
Abstract
A discrete element method for modelling fracture evolution of roadway surrounding rock is provided, which includes: taking rock cores from a coal seam in the field and recording RQD values, observing roadway deformation, and making a statistical analysis on distribution characteristics of fractures in the coal seam; testing mechanical parameters of coal-rock samples indoors, and calculating strength of a rock mass according to the RQD values; creating a numerical model by using a UDEC-Trigon module to adjust the parameters to match the strength of the rock mass, and correcting model parameters; and creating a numerical model of an engineering scale to adjust the parameters to match field deformation characteristics, and finally simulating fracture evolution of the roadway surrounding rock. The present invention provides accurate and basic mechanical parameters for discrete-element numerical simulation of roadway deformation, guaranteeing realistic and reliable simulation results.