China University of Mining and Technology (CUMT)

China Mining & Civil New Material Science and Technology Ltd.

Suzhou Metabrain Intelligent Technology Co., Ltd.

Boxia Mining Technology Ltd.

Xiangyu Wang

Junwu Xia

Jianbiao Bai

Shuai Yan

Rui Wang

Zhili Hou

Xiubo Zhang

Zaizhuang Fan

Ying Xu

Gongyuan Wang

Ningkang Meng

A data acquisition method and apparatus and a computer device. The method includes: configuring a server cluster and a network file system server to a target wide area network; broadcasting, by a baseboard management controller, serving as a target baseboard management controller, a link layer discovery protocol data frame to the target wide area network, and receiving, by a baseboard management controller serving as a preset baseboard management controller in the target wide area network except for the target baseboard management controller, the link layer discovery protocol data frame broadcast by the target baseboard management controller, to achieve successful handshake communication of two servers; obtaining a preset data acquisition rule of the baseboard management controller in response to the baseboard management controller reporting an error; and acquiring data of the baseboard management controller based on the preset data acquisition rule through the network file system server.

Data acquisition method and apparatus, and computer device

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.

Discrete element method for modelling a fracture evolution of a roadway surrounding rock

An apparatus for protecting a roof tray when a gob-side entry retaining end support migrates is provided. The apparatus is mounted at a top end position of a hydraulic support, and includes a movable bearing mechanism, an automatic expansion/contraction connecting groove mechanism, and an active reset mechanism. The movable bearing mechanism includes two parallel belts and a plurality of rollers supporting the belts, and the rollers are mounted on and supported by a bearing mechanism. The automatic expansion/contraction connecting groove mechanism is two concave base plates fixed between the two belts, and the two concave base plates are spaced by a distance. The active reset mechanism includes two telescopic rods and reset springs sleeved on the telescopic rods, and the telescopic rod is connected to an end portion of the reset spring to form a synchronous mechanism.

Apparatus for protecting roof tray when gob-side entry retaining end support migrates

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Jiangsu, China

Xiangyu Wang