A method to excavation and expand underground tunnel for a catchment of a bedrock aquifer and an apparatus to expand underground tunnel for a catchment of a bedrock aquifer

摘要

The present invention relates to an underground bedrock water harvesting hole expansion method and a water extraction hole expansion device, comprising the steps of inserting the sealing part of the extraction hole expansion device into a collection hole formed in a bedrock aquifer, and compressing the sealing part to separate the collection hole from the first space Separating into two spaces and sealing the first space, injecting air into the first space to raise the pressure higher than the pressure in the second space, and allowing air and sludge in the first space to flow into the second space and connecting the first space and the second space.