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公开(公告)号：US11034054B2
公开(公告)日：2021-06-15
申请号：US17043686
申请日：2019-10-08
Applicant: China University of Mining and Technology , China Mining & Civil New Material Science and Technology Ltd. , BOXIA MINING TECHNOLOGY LTD.
Inventor： Hong Chang , Junwu Xia , Xiaofang Xiang , Xia Bai
Abstract: A prefabricated stair modular assembly mold comprises a base, a step standard module, an upside module of a lower platform, an underside rotating module of a lower platform, an upside module of an upper platform, an underside rotating module of an upper platform, an underside common module, and an underside adjustment modules. Prefabricated stair molds of different dimensions are formed by means of locating holes provided in the assembling modules, and are then fixed by means of sliding holes at two ends. Further disclosed is a mounting method for said assembly mold. Said assembly mold has high positioning accuracy, and small accumulated error, improving the mounting efficiency of the prefabricated staircase mold.
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公开(公告)号：US20210263003A1
公开(公告)日：2021-08-26
申请号：US17043707
申请日：2019-10-08
Applicant: China University of Mining and Technology , China Mining & Civil New Material Science and Technology Ltd. , BOXIA MINING TECHNOLOGY LTD.
Inventor： Xiangyu WANG , Jiangbiao BAI , Junwu XIA , Shuai YAN
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.
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公开(公告)号：US11209415B2
公开(公告)日：2021-12-28
申请号：US17043707
申请日：2019-10-08
Applicant: China University of Mining and Technology , China Mining & Civil New Material Science and Technology Ltd. , BOXIA MINING TECHNOLOGY LTD.
Inventor： Xiangyu Wang , Jianbiao Bai , Junwu Xia , Shuai Yan
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.
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公开(公告)号：US20210017775A1
公开(公告)日：2021-01-21
申请号：US17043686
申请日：2019-10-08
Applicant: China University of Mining and Technology , China Mining & Civil New Material Science and Technology Ltd. , BOXIA MINING TECHNOLOGY LTD.
Inventor： Hong CHANG , Junwu XIA , Xiaofang XIANG , Xia BAI
Abstract: A prefabricated stair modular assembly mold comprises a base, a step standard module, an upside module of a lower platform, an underside rotating module of a lower platform, an upside module of an upper platform, an underside rotating module of an upper platform, an underside common module, and an underside adjustment modules. Prefabricated stair molds of different dimensions are formed by means of locating holes provided in the assembling modules, and are then fixed by means of sliding holes at two ends. Further disclosed is a mounting method for said assembly mold. Said assembly mold has high positioning accuracy, and small accumulated error, improving the mounting efficiency of the prefabricated staircase mold.
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