Study On The Hydrogeological Characteristics And Water Yield Prediction In Meijiang Tunnel Engineering

In the process of tunnel construction, the safety of the construction and water inflow are closely related, how to accurately predict the inflow is crucial, and the size of the water inflow control is mainly controlled hy lithology, rock structure, structure and other factors. Calculation of the prediction of water inrush is mainly through the hydrogeological parameters, research on hydrogeological test so the strata structure, permeability, regional structure, obtaining hydrogeological parameters is of practical significance.This paper set out from practice, introduces the study area topography and meteorological and hydrological conditions, rock formation, geological features, analysis of the structure of permeability hydrogeological significance, rock mass and its structure in the study area of the porous media, permeability structure types of rock were divided in detail, and the permeability. Research. By optimizing method of geological test of hydrology, main hydrogeological test methods identified in the study area, and the key process, the hydrogeological test of hydrogeological test materials were summarized, and then the prediction of inflow hydrogeological parameters and tunnel is analyzed and calculated, and reached the following understanding:1, Study area the main water-bearing medium rock cranny, diagenetic porosity, loose sediments porosity, the permeability structure with the space distribution;2, Permeability structure types of the study area was divided in detail;3, The main factors controlling the permeability of rock masses are summarized, and the corresponding physical work in the field;4, Method of test for geological hydrology are optimized, the hydrogeological test method to determine the study area;5, Analysis of the calculation method of prediction of water inflow into a tunnel, the most close to the actual inflow of water;6, Method is proposed to solve the problem through the water inrush may occur in the construction process and measures in the pipeline.The above research results for Meijiang tunnel engineering and obtain accurate inflow has guiding significance for similar engineering prediction.