Abstract:

Shaft aquifer pre-grouting working face, in order to prevent the grouting process in a lot of slurry infiltrated into the working face, reducing the grouting effect, therefore we must construct high strength concrete grouting pad reasonable, if the condition allows setting of rock cap and grout pad constitute pressure, grout pad design is reasonable or not directly effect of the grouting effect, there are many factors affecting grouting pad, is discussed in this paper through the analysis of the effects of grouting pad and combined with the geological and hydrological conditions the fourth coal mine, design and calculate the working face pre - grouting grout pad forms and parameters, guarantee the grouting effect, provides a safe working environment and reliable to work during the 4th coal mine main shaft excavation face pre-grouting, it also provides a theoretical basis for the rational design of the same conditions pre-concreting grout pad.

Key words: pregrouting of working face, grouting pad, parameters of grouting pad, deep shaft