With the upgrading of modern mining technology, for the construction of water conservancy projects, the mining planning of the comprehensive material yard has a certain impact on the investment benefit of earth and ro...With the upgrading of modern mining technology, for the construction of water conservancy projects, the mining planning of the comprehensive material yard has a certain impact on the investment benefit of earth and rock dam. The relevant technical personnel need to plan the project scientifically and reasonably, and the project investment and project quality will be designed to require strict control. Based on this, this paper first expounds the selection principle of comprehensive material site, secondly, the comprehensive material site verification and mining planning are analyzed, and finally, from three aspects of investment mining planning, mining mode and operation scheme to explore the impact of comprehensive material site mining planning on earth-rock dam investment, for the reference of relevant personnel.展开更多
The objective of this paper was to develop a comprehensive evaluation method and index to evaluate the performance of sealants and fillers for cracks in asphalt concrete pavements using the method of principal compone...The objective of this paper was to develop a comprehensive evaluation method and index to evaluate the performance of sealants and fillers for cracks in asphalt concrete pavements using the method of principal component analysis. The performance experiments including cone penetration, softening point, flow, resilience and tension at low temperature respectively were conducted by reference of ASTM D5329 for eight sealants and fillers often used in China. There by a principal component model was developed and weight of every index was calculated. The experimental results show that there are significantly different performances for sealants and fillers often used in China. Principal component analysis is an objective method that evaluates and selects the performance of sealants and fillers for cracks in asphalt concrete pavements.展开更多
文摘With the upgrading of modern mining technology, for the construction of water conservancy projects, the mining planning of the comprehensive material yard has a certain impact on the investment benefit of earth and rock dam. The relevant technical personnel need to plan the project scientifically and reasonably, and the project investment and project quality will be designed to require strict control. Based on this, this paper first expounds the selection principle of comprehensive material site, secondly, the comprehensive material site verification and mining planning are analyzed, and finally, from three aspects of investment mining planning, mining mode and operation scheme to explore the impact of comprehensive material site mining planning on earth-rock dam investment, for the reference of relevant personnel.
基金Funded by the National Natural Science Foundation of China(Nos.51408287 and 51668038)the Rolls Supported by Program for Changjiang Scholars and Innovative Research Team in University(IRT_15R29)+2 种基金the Distinguished Young Scholars Fund of Gansu Province(1606RJDA318)the Natural Science Foundation of Gansu Province(1506RJZA064)the Excellent Program of Lanzhou Jiaotong University(201606)
文摘The objective of this paper was to develop a comprehensive evaluation method and index to evaluate the performance of sealants and fillers for cracks in asphalt concrete pavements using the method of principal component analysis. The performance experiments including cone penetration, softening point, flow, resilience and tension at low temperature respectively were conducted by reference of ASTM D5329 for eight sealants and fillers often used in China. There by a principal component model was developed and weight of every index was calculated. The experimental results show that there are significantly different performances for sealants and fillers often used in China. Principal component analysis is an objective method that evaluates and selects the performance of sealants and fillers for cracks in asphalt concrete pavements.
