Study on Influencing Factors of Working Performance of Fly Ash Paste Filling Materials
In order to promote the popularization and application of filling mining,the orthogonal test method was adopted to study the effects of slurry mass concentration,gangue particle size,gangue-ash ratio and fly ash replacement rate on the transportation and mechanical properties of fly ash paste filling materials through tests of water loss rate,slump and uniaxial compression.The optimal ratio of filling materials in the current experimental stage was given.The results show that the slurry mass concentration is the main factor of transportation performance,followed by fly ash replacement rate and gangue-ash ratio,and the influence of gangue particle size is small.Slurry mass concentration is also the main factor of mechanical properties,followed by gangue-ash ratio,and the effects of fly ash replacement rate and gangue particle size are relatively small.At present,the optimal ratio of fly ash paste filling materials is slurry mass concentration of 80％,gangue particle size of 0-5 mm,gangue ash ratio of 1.0 and fly ash replacement rate of 30％.The research results are of great significance for reducing the filling cost.
万方数据
维普
