Mapping water-rich goaf utilizing microtremor exploration method

The rich water goaf is one of the primary factors that endanger the safety of the foundation engineering, which will lead to the problems such as setting of ground. It is the method to detect the water-rich goaf accurately, efficiently and lossless that should be solved in engineering geophysics. According to the relationship between saturated water content and different porosity as well as S-shear velocity, this article documents the first application of the microtremor survey method to map the water-rich goaf. Compared with the high-density electrical method, the method is more accurate for the anomaly detection of the water-rich goaf. In the known goaf area, which belongs to one construction project department of the Qingdao Metro Line 8, the S-shear velocity profile using the 2D microtremor method can clearly depict the goaf position, which matches well with the high-density electrical inversion results and drilling data. The microtremor exploration method is proven to be an effective exploration method for mapping water-rich goafs, therefore, microtremor exploration method have technical advantages and bright application prospects for the detection of underground anomalous water-rich areas in engineering construction. Presentation Date: Tuesday, September 17, 2019 Session Start Time: 1:50 PM Presentation Start Time: 2:15 PM Location: Poster Station 3 Presentation Type: Poster