The Engineering Application Research Of Dual Fluid Silicification Grouting To Reinforce The Sedimentary Sand Layer Of Fluvial Facies

In the construction of the drift in Xiayukou mine, a nearly 1000 m length sedimentary sand layer of fluvial faces should be crossed. Traditional method couldn’t solve the problem and the research of the reinforcement by using dual fluid silicification grouting is greatly needed.This paper combines the engineering application with the scientific data of laboratory test and via analyzing of each kind of test data,the basic soil mechanics parameters have been optimized and obtained. According to the laboratory test data, the grouting parameter of α, which is important to grouting reinforcement project, is acquired. Start with the material composition of dual fluid silicification grouting and analyzing the micro chemical reaction, the change mechanisms of soil samples intensity will be more clear. The equation of Maag has been optimized by pressure head relation and permeability coefficient of grouting. The introduction of grouting coefficient of soil void will optimize the formula of Magg’s osmotic grouting theory. The application of simulated sand grouting test results which have proved the rationality of the modified Magg’s formula. The paper has acquired the parameters of dual fluid silicification grouting and laid the foundation for industrial application with the analysis of experimental data and modified Maag’s formula. An effective drainage scheme has been designed, which makes full use of geographical advantage, and made remarkable profit.The paper contributes to control the deformation of footrill as well as the upper formation and ensure the security of surface structures.