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According to the principle of effective stress action of rock and soil, we established a mechanical model of water flooding into roadways,analyzed the constitutive relation of hydrodynamic pressure and contact pressure of rock and soil and discovered that the process of pre-grouting of a roadway curtain is a dynamically balancing process in which effective stress keeps gradually in- creasing and pore water pressure gradually declines. In such a grouting process, the initial water plugging effect is realized when the effective stress and total stress reaches equilibrium. A rigid-flexible packing layer is designed behind the brickwork to increase the effective stress and reduce pore water pressure in order to have a permanent water proof performance. This provides a theoretical basis for roadway driving and permanent water prevention. The monitoring and application results show that the initial and perma- nent waterproof theory has provided an effective method for roadway driving and making it waterproof.
According to the principle of effective stress action of rock and soil, we established a mechanical model of water flooding into roadways, analyzed the constitutive relation of hydrodynamic pressure and contact pressure of rock and soil and discovered that the process of pre-grouting of a roadway在 这种 灌注 过程 进行 过程 的 应用. A dynamic-packing process in which the effective stress and total water stress gradually equilibrium. A rigid-flexible packing This is a theoretical basis for roadway driving and permanent water prevention. The monitoring and application results show that the initial and perma - nent waterproof theory has provided an effective method for roadway driving and mak ing it waterproof.