On the basis of considering the heterogeneity and using the finite element numerical simulation, this thesis investi- gates the damage of the roof and coal as well as the failure of evolutionary process during the re-...On the basis of considering the heterogeneity and using the finite element numerical simulation, this thesis investi- gates the damage of the roof and coal as well as the failure of evolutionary process during the re-exploitation of the residual coal. According to the analysis of the damage field, stress field and the failure process, it explores the damage evolution, stress distribution laws and the damage models. Besides, this thesis puts forward the idea of penetrating and establishing drilling steels aimed at solving the problem of wall carving and roof fall, meanwhile this suggestion accomplishes the successful appli- cation effect in the testing ground. This thesis demonstrates that the re-exploitation of the residual coal can be carried out and the safe production can be ensured by adopting some measures. What＇s more, the research result provides the theoretical and practical experience for the re-exploitation of the residual coal in the similar conditions.展开更多
Computer supported collaborative design (CSCD) technology has been applied extensively with intensive market competition.The key technologies and problems of CSCD are analyzed and a CSCD design frame faced to product ...Computer supported collaborative design (CSCD) technology has been applied extensively with intensive market competition.The key technologies and problems of CSCD are analyzed and a CSCD design frame faced to product design is estab- lished.Then a CSCD system faced to radar key components is founded with Pro/INTRALINK software and re-exploiting technolo- gy.Some key processes are also designed,such as database management,work flow programming,information communication, file release,conflict identification and safety management.These will provide a reference for constructing a cooperative design en- vironment.展开更多
基金Supported by the Natural Science Foundation of Shanxi （2013021029-2）, the 12th Five-Year Science and Technology Support Program （2012BAB 13B04）, the Research Fund for the Doctoral Program of Higher Education of China （20111402120004）
文摘On the basis of considering the heterogeneity and using the finite element numerical simulation, this thesis investi- gates the damage of the roof and coal as well as the failure of evolutionary process during the re-exploitation of the residual coal. According to the analysis of the damage field, stress field and the failure process, it explores the damage evolution, stress distribution laws and the damage models. Besides, this thesis puts forward the idea of penetrating and establishing drilling steels aimed at solving the problem of wall carving and roof fall, meanwhile this suggestion accomplishes the successful appli- cation effect in the testing ground. This thesis demonstrates that the re-exploitation of the residual coal can be carried out and the safe production can be ensured by adopting some measures. What＇s more, the research result provides the theoretical and practical experience for the re-exploitation of the residual coal in the similar conditions.
基金Funded by Tackling Item of Minister of Science and Technology(2001BA201A56)
文摘Computer supported collaborative design (CSCD) technology has been applied extensively with intensive market competition.The key technologies and problems of CSCD are analyzed and a CSCD design frame faced to product design is estab- lished.Then a CSCD system faced to radar key components is founded with Pro/INTRALINK software and re-exploiting technolo- gy.Some key processes are also designed,such as database management,work flow programming,information communication, file release,conflict identification and safety management.These will provide a reference for constructing a cooperative design en- vironment.
