Hydrological exploration drilling well pipe, coal mining pipe descending method and hydrological exploration method

Abstract

The invention discloses a hydrological exploration drilling well pipe, a coal mining pipe descending method and a hydrological exploration method. The hydrological exploration drilling well pipe comprises a top pipe, a middle pipe and a bottom pipe, wherein the upper end of the top pipe is exposed from the ground, and the lower end of the top pipe is buried in an exploration hole; first external threads are formed at the lower end of the top pipe; the middle pipe is arranged below the top pipe; first internal threads which are matched with the first external threads are formed at the upper end of the middle pipe; second external threads are formed at the lower end of the middle pipe; the bottom pipe is arranged below the middle pipe; second internal threads are formed at the upper end of the bottom pipe; and the bottom pipe can be in screwed connection with the middle pipe. By adoption of the hydrological exploration drilling well pipe, the coal mining pipe descending method and the hydrological exploration method, the bottom pipe, the middle pipe and the top pipe are sequentially arranged in the exploration hole and fixed in a screwed connection mode. During soil layer stripping after exploration is finished, the exploration hole cannot be buried by sands due to supporting of the well pipe. Compared with the prior art, the hydrological exploration drilling well pipe has the advantages that repeated drilling operation is avoided, and working efficiency is improved.

Description

Technical field [0001] The invention relates to hydrogeological prospecting technology, in particular to a hydrological prospecting drilling well pipe, a method for down-pipe in coal mining and a hydrological prospecting method. Background technique [0002] In the early stage of coal mining, hydrological exploration of underground aquifers is required. For open-pit coal mining, hydrological exploration is to drill hydrological exploration holes on the ground and observe through the exploration holes. After hydrological exploration, geological stripping of coal mining can be carried out. During the advancement of the stripping work, exploration holes will gradually be buried, and continuous mining requires continuous hydrological exploration, so drilling operations must be repeated, which has a great impact on production efficiency. Summary of the invention [0003] The invention provides a hydrological exploration drilling well pipe, a coal mining downpipe method, and a hydrolog...

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Problems solved by technology

[0003] The invention provides a drilling well pipe for hydrological exploration, a method for lowering the pipe in coal mining and a hydrological exploration

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