Study On Shaft Surface Pre Grouting Technology In Huainan Mine Area

Coal resources become increasingly scarce, Deep Mining will be developed by the coal mine and be the inevitable trend in future. However, Ground water treatment become more difficult during the shaft excavation construction At present, In the prevention and cure of shaft water inflowing, it formed a ground pre-grouting of advanced construction craft and technology. But because of the lack of research and understanding enough for grouting mechanism, and the grouting is relatively hidden, When the slurry infiltration in soil, it can not be in-depth study, it has very big difference between the theoretical calculation and engineering practice, people tend to rely on experience and engineering analogy method to guide the construction, it is difficult to ensure the water plugging and grouting, and it can not effectively solve the practical engineering problems in the grouting process.This paper first analyzes the grouting mechanism of surface pretreatment, including its diffusion mechanism, mechanism of action, grouting parameters, etc. it focused on the analysis of the penetration of slurry in the formation of the diffusion, and it designed the reasonable ground pre-grouting construction scheme through the study of the mechanism of grouting, one of the "three simultaneity" construction technology greatly shortened the construction time. the finite element software was used to simulate grouting penetration, the main influence factors of slurry diffusion and diffusion was studied, providing the necessary theoretical basis for the construction of grouting design.This paper summarizes the shaft surface pre grouting parameters designs and constructions of the Huainan mine, the Zhangji Coal Mine vice well shaft surface pre grouting engineering works as an example, it was reasonable to design shaft grouting construction scheme. Work safety in accordance with the relevant provisions. and use monitoring equipment to monitor the grouting process, adjust the grouting parameters according to the real-time measured data analysis, and make sure the safety of the grouting process, it ensured that the grouting quality and management of water quality, This big success of the shaft surface pre grouting engineering not only provided a reference in Huainan mining area, but also provided important reference basis for guiding the ground pre-grouting project, it gained remarkable economic benefits and social benefits.