Concrete structures in main coal cleaning plants have been rebuilt and reinforced in the coal mines of the Shanghai Datun Energy Sources Co. Ltd., the first colliery of the Pingdingshan Coal Co. Ltd. and the Sanhejian...Concrete structures in main coal cleaning plants have been rebuilt and reinforced in the coal mines of the Shanghai Datun Energy Sources Co. Ltd., the first colliery of the Pingdingshan Coal Co. Ltd. and the Sanhejian mine of the Xuzhou Mining Group Co. Ltd. In these projects, the operating environment and reliability of concrete structures in the main plants of the three companies were investigated and the safety of the structures inspected. Qualitative and quantitative analyses were made on the special natural, technological and mechanical environments around the structures. On the basis of these analyses, we discuss the long-term, combined actions of the harsh natural (corrosive gases, liquids and solids) and mechanical environments on concrete structures and further investigated the damage and deteriorating mechanisms and curing techniques of concrete structures in the main coal cleaning plants. Our study can provide a theoretical basis for ensuring the reliability of concrete structures in main coal cleaning plants.展开更多
The mechanic properties, lasting strength and microstructural properties of straight and elbow pipesof 12CrMo, 10CrMo910 and 12CrlMoV low alloy steel main steam piping system after long-time service weretested and stu...The mechanic properties, lasting strength and microstructural properties of straight and elbow pipesof 12CrMo, 10CrMo910 and 12CrlMoV low alloy steel main steam piping system after long-time service weretested and studied. The testing results showed that, for straight and elbow pipes of mainsteam piping under theconditions of high temperature and high pressure, the numerical operating performance indexes of their metalchanged with little difference, generally both within 5%, and the Values of elbow were higher than those ofstraight pipes. These phenomena proved that the aging processes of pipe metal at different positions are thesame. And the cause for higher numerical performance indexes of elbow and higher failure rate at elbow posi-tion during operation of steam pipes were investigated.展开更多
基金Project BK2008128 supported by the Natural Science Foundation of Jiangsu Province
文摘Concrete structures in main coal cleaning plants have been rebuilt and reinforced in the coal mines of the Shanghai Datun Energy Sources Co. Ltd., the first colliery of the Pingdingshan Coal Co. Ltd. and the Sanhejian mine of the Xuzhou Mining Group Co. Ltd. In these projects, the operating environment and reliability of concrete structures in the main plants of the three companies were investigated and the safety of the structures inspected. Qualitative and quantitative analyses were made on the special natural, technological and mechanical environments around the structures. On the basis of these analyses, we discuss the long-term, combined actions of the harsh natural (corrosive gases, liquids and solids) and mechanical environments on concrete structures and further investigated the damage and deteriorating mechanisms and curing techniques of concrete structures in the main coal cleaning plants. Our study can provide a theoretical basis for ensuring the reliability of concrete structures in main coal cleaning plants.
文摘The mechanic properties, lasting strength and microstructural properties of straight and elbow pipesof 12CrMo, 10CrMo910 and 12CrlMoV low alloy steel main steam piping system after long-time service weretested and studied. The testing results showed that, for straight and elbow pipes of mainsteam piping under theconditions of high temperature and high pressure, the numerical operating performance indexes of their metalchanged with little difference, generally both within 5%, and the Values of elbow were higher than those ofstraight pipes. These phenomena proved that the aging processes of pipe metal at different positions are thesame. And the cause for higher numerical performance indexes of elbow and higher failure rate at elbow posi-tion during operation of steam pipes were investigated.
