Three dimensional mechanical numerical analyzing on mine pass construction of metal mine
Mine use sublevel caving method, in the production process, the mine pass is an essential ore transport channel, in the production plays an very important role. Therefore the stability of the chute is an important technical support of the mining production and the safety in underground metal mines. Taking a sublevel caving method mining as the research background, Using the MIDAS / GTS finite element software to do numerical analysis of the chute excavation and support of three-dimensional mechanical problems. Results show that: After chute excavation, the wall within 0.3m of a significant displacement, shift several millimeters; different levels of access road excavation, the wall is affected little, But the access road junction with the chute significant displacement, especially with the chute increase the depth of wall the displacement increases; Slip road connecting the wells and different levels of support according to the design parameters, the effect of displacement control of the range of wall displacement and the interchange of access road and chute is significant.
Numerical simulation of structural parameters of large section pillarless sublevel caving of Jinshandian Ore Mine
Aiming at the problem of pillarless sublevel caving structural parameters of the third period mining area of Jinshandian Ore Mine,the possible structural parameters are simulated and analyzed by using sublevel caving simulation system –SLS which is developed by Northeastern University of China and the geotechnical engineer software-FLAC3D which is developed by ITASCA Inc.The numerical experiment indicates that independent advance of ore breaking influences the recovery index evidently,and the independent advance of ore breaking of 3.5-4.5 m has more advantage in recovery index.Also considering the rock blasting effect,the independent advance of ore breaking of 3.5 m is recommended.The numerical simulation of sequential excavation of tunnel groups in a mine block is also carried out.By analyzing the displacements,stresses and plastic zone of excavation simulation,it is concluded that the tunnel groups have satisfactory stability with the designed structural parameters.To sum up,sublevel height of 14 m,drift interval of 16 m,tunnel width of 3.6 m and tunnel height of 3.2 m are reasonable for both the recovery index and the surrounding rock stability.
Project management education: The human skills imperative
Abstract This paper is intended to provide an insight into the importance of human skills in project management success and the apparent lack of emphasis placed on this within the context of university education. The discussion will call upon the viewpoints of many notable authors in respect to the human or ‘soft’ skills that are necessary in the management of projects. Against this background a review will be conducted into how well project management literature and university education equips potential project managers in the area of human skills. As the PMBOK ® Guide is one of the major recommended texts in Australian universities offering project management education, the paper will identify that it predominantly emphasises the required ‘hard (technical) skills’ at the expense of the ‘soft (human) skills’. Subsequent discussion will highlight the need for a balance between hard and soft skills within project management education in universities. It will conclude that educators within this discipline should recognise the importance of incorporating greater human skills aspects into their educational programs.