关键词: 水泥基泡沫;屈服应力;塑性黏度;倾斜裂隙;均匀设计

Abstract: Cement based foam fluid is a new type of fracture prevention and control material for high temperature coal and rock , and its rheological property is the key index in the process of engineering application .On the basis of analysis of rheological parameters of three-phase foam slurry material using rheometer and ring tube test , the force and motion analysis of foam in inclined slit channel were carried out.The relation equations between yield stress and plastic viscosity at different fracture angles were obtained .A physical model of foam flow in inclined slit channel was established .The regression equation of rheological parameters was obtained by uniform design .And the order of the four factors is as follows:mud water cement ratio , cement base foam content , coagulant dosage and fly ash content .Then, with the actual engineering application index , the material ratio with lower yield stress and plastic viscosity was obtained.Specifically, the amount of water base foam is 4V, the mud water cement ratio is 0.5, the content of fly ash is 30%, and the dosage of the coagulant is 5%.

Key words: cement based foam;yield stress;plastic viscosity;inclined fracture;uniform design