Mining machineries are generally exposed to intensive vibrations in harsh mining environment. If vibrations are beyond the tolerable limit, the machine and its operator health will be under the risk. In this work, the...Mining machineries are generally exposed to intensive vibrations in harsh mining environment. If vibrations are beyond the tolerable limit, the machine and its operator health will be under the risk. In this work, the vibration of a mining truck at different operational conditions are simulated and discussed. To achieve this aim, three haul roads with low, medium and poor qualities are considered based on the ISO standard. Accordingly, the vibration of a mining truck in different speeds, payload and distribution qualities of materials in the dump body are evaluated in each haul road quality using Trucksim software. The simulation results with statistical discussions indicate that the truck speed and the materials distribution quality have significant effects on the root mean square(RMS) of vertical vibrations. However, the effect of the payload is not considerable on the RMS. Moreover, the accumulation of materials on the rear side of the truck dump body is efficient on the vibrational health risk.展开更多
In the background of modem education, ideological and political education and health education in universities play an important part in quality education. In higher education, ideological and political education and ...In the background of modem education, ideological and political education and health education in universities play an important part in quality education. In higher education, ideological and political education and health education plays a role in their respective fields. Ideological and political education determines socialist direction of education and promotes the development of quality education. Mental health education starting from individual students, which improves student＇ s personality, promotes the comprehensive development of students; further promote the development of quality education. We can say that physical and mental health education and ideological and political education are supplementary to each other as well as enrich and expand health education, ideological and political education.展开更多
文摘Mining machineries are generally exposed to intensive vibrations in harsh mining environment. If vibrations are beyond the tolerable limit, the machine and its operator health will be under the risk. In this work, the vibration of a mining truck at different operational conditions are simulated and discussed. To achieve this aim, three haul roads with low, medium and poor qualities are considered based on the ISO standard. Accordingly, the vibration of a mining truck in different speeds, payload and distribution qualities of materials in the dump body are evaluated in each haul road quality using Trucksim software. The simulation results with statistical discussions indicate that the truck speed and the materials distribution quality have significant effects on the root mean square(RMS) of vertical vibrations. However, the effect of the payload is not considerable on the RMS. Moreover, the accumulation of materials on the rear side of the truck dump body is efficient on the vibrational health risk.
基金ACKNOWLEDGEMENTS National Social Science Fund ＂trend analysis of China＇s rigid social conflicts and resolve countermeasure research＂ （project approval number： 14ZDA061）, National Social Science major projects （14zda052）, the National Natural Science Foundation of China （71373212）
文摘In the background of modem education, ideological and political education and health education in universities play an important part in quality education. In higher education, ideological and political education and health education plays a role in their respective fields. Ideological and political education determines socialist direction of education and promotes the development of quality education. Mental health education starting from individual students, which improves student＇ s personality, promotes the comprehensive development of students; further promote the development of quality education. We can say that physical and mental health education and ideological and political education are supplementary to each other as well as enrich and expand health education, ideological and political education.
