A Method for Detecting Fluid and Gas in Underground Rock Mass Using Elastic Wave Reflection Method

Abstract

The invention discloses a method for exploring fluid and gas in an underground rock mass by adopting an elastic wave reflection method. An elastic wave which is used for finding an explored object needs to be capable of bypassing the explored object, propagating in media, including a rock mass, on the periphery of the explored object, reaching an interface on the side, which is far relative to a survey line, of the explored object, and being reflected; moreover, the used elastic wave also needs to be capable of penetrating space or filling substance of the explored object, reaching the interface on the far side of the explored object and being reflected. According to the method, a method capable of separating longitudinal and transverse waves and a method capable of receiving a high broadband elastic wave are provided; the problem about exploring underground water and other fluid and gas substances by using the elastic wave which cannot be solved in industry at present is solved; particularly, the substances, with influence on engineering safety and quality, in a karst cave or an underground river with the diameter of over one meter can be explored.

Description

technical field [0001] The invention relates to geophysical exploration technology, especially the method and technology for directly detecting groundwater and other liquids and gases by using the elastic wave reflection method. Background technique [0002] The elastic wave reflection method has been widely used since it was put forward in the 1920s, and has been widely used in energy exploration, engineering and shallow exploration. It is the method with the largest application workload in geophysical exploration technology at home and abroad. In recent decades, the industry has been continuously researching the direct exploration of groundwater and other fluid and gas substances by elastic wave method. In particular, the longitudinal wave can pass through the medium containing liquid and gas, but the shear wave cannot pass through the liquid and gas. Many people in the industry want to use these characteristics to realize the elastic wave reflection method to find water d...

AI Technical Summary

Problems solved by technology

But have not been able to break through

At the same time, in the tunnel construction forecast, when the detection equipment needs to be installed on the full-face tunnel boring machine for automatic detection, the huge moving metal machinery such as the shield machine and TBM is a strong interference to the electromagnetic geophysical method.

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