The HT-7U super-conducting tokamak is a full super-conducting magnetically confined fusion device, It mainly consists of super-conducting toroidal field (TF) coils and super conducting poloidal field (PF) coils. This...The HT-7U super-conducting tokamak is a full super-conducting magnetically confined fusion device, It mainly consists of super-conducting toroidal field (TF) coils and super conducting poloidal field (PF) coils. This paper describes the distribution of magnetic field, ripple and electromagnetic loads of TF system, some results are necessary to analyze and calculate the stresses and deformation on TF system by a finite element method. Meanwhile, in this paper, the main scope of the calculation is carried out for the case of constant magnetic field on conductor of the TF coil winding in order to provide electromagnet parameters for the quench analysis of Cable-in-Conduit Conductor (CICC) of TF system in HT-7U.展开更多
Prevention and control of water disasters is an important part of coal mine safety. Water accumulation in goaf is a common major flood, especially in shallow coal seams, which brings huge potential safety hazard to th...Prevention and control of water disasters is an important part of coal mine safety. Water accumulation in goaf is a common major flood, especially in shallow coal seams, which brings huge potential safety hazard to the mining of underlying coal seams. In this paper, the 8105 working face of a coal mine is taken as the research object, and the safe mining technology of the working face under the condition of water accumulation in the overlying goaf is studied by using the methods of field test, theoretical analysis and theoretical calculation. The research results show that: ① In rainy season, the atmospheric precipitation leaks along the mining cracks, resulting in water accumulation in the goaf above the 8105 working face;② Faults and structural cracks become hydraulic passages between the 8105 working face and the overlying goaf;③ Reasonable passage and arrangement of groundwater detection and release scheme have realized the safe mining of 8105 working face.展开更多
An integration processing system of three-dimensional laser scanning information visualization in goaf was developed. It is provided with multiple functions, such as laser scanning information management for goaf, clo...An integration processing system of three-dimensional laser scanning information visualization in goaf was developed. It is provided with multiple functions, such as laser scanning information management for goaf, cloud data de-noising optimization, construction, display and operation of three-dimensional model, model editing, profile generation, calculation of goaf volume and roof area, Boolean calculation among models and interaction with the third party soft ware. Concerning this system with a concise interface, plentiful data input/output interfaces, it is featured with high integration, simple and convenient operations of applications. According to practice, in addition to being well-adapted, this system is favorably reliable and stable.展开更多
文摘The HT-7U super-conducting tokamak is a full super-conducting magnetically confined fusion device, It mainly consists of super-conducting toroidal field (TF) coils and super conducting poloidal field (PF) coils. This paper describes the distribution of magnetic field, ripple and electromagnetic loads of TF system, some results are necessary to analyze and calculate the stresses and deformation on TF system by a finite element method. Meanwhile, in this paper, the main scope of the calculation is carried out for the case of constant magnetic field on conductor of the TF coil winding in order to provide electromagnet parameters for the quench analysis of Cable-in-Conduit Conductor (CICC) of TF system in HT-7U.
文摘Prevention and control of water disasters is an important part of coal mine safety. Water accumulation in goaf is a common major flood, especially in shallow coal seams, which brings huge potential safety hazard to the mining of underlying coal seams. In this paper, the 8105 working face of a coal mine is taken as the research object, and the safe mining technology of the working face under the condition of water accumulation in the overlying goaf is studied by using the methods of field test, theoretical analysis and theoretical calculation. The research results show that: ① In rainy season, the atmospheric precipitation leaks along the mining cracks, resulting in water accumulation in the goaf above the 8105 working face;② Faults and structural cracks become hydraulic passages between the 8105 working face and the overlying goaf;③ Reasonable passage and arrangement of groundwater detection and release scheme have realized the safe mining of 8105 working face.
基金Project(51274250)supported by the National Natural Science Foundation of ChinaProject(2012BAK09B02-05)supported by the National Key Technology R&D Program during the 12th Five-year Plan of China
文摘An integration processing system of three-dimensional laser scanning information visualization in goaf was developed. It is provided with multiple functions, such as laser scanning information management for goaf, cloud data de-noising optimization, construction, display and operation of three-dimensional model, model editing, profile generation, calculation of goaf volume and roof area, Boolean calculation among models and interaction with the third party soft ware. Concerning this system with a concise interface, plentiful data input/output interfaces, it is featured with high integration, simple and convenient operations of applications. According to practice, in addition to being well-adapted, this system is favorably reliable and stable.
