Three-dimensional detection method for use before exploitation of working surface coal bed

Abstract

The invention discloses a three-dimensional detection method for use before exploitation of a working surface coal bed. The method comprises the following specific steps of: detecting whether a buried geological structure exists at the position of the working surface coal bed by adopting a radio wave tunnel penetration technology, and determining the specific position and range of the buried geological structure; detecting whether a buried water guide structure exists in the range of a working surface bottom plate or top plate by adopting an amplitude-frequency-electricity penetration technology, and determining the specific position and range of the buried water guide structure; detecting whether a buried water guide structure exists below a tunnel bottom plate by adopting a direct-current depth measurement technology, and evaluating; and completely detecting whether buried water guide structures exist inside the working surface and on the bottom plate, the top plate and the periphery by adopting a transient electromagnetic detection technology. The three-dimensional detection method has the beneficial effects that true space detection is realized, the water inrush hidden trouble situation in the damage influence range of stoping on the working surface coal bed can be checked to the maximum extent, accidents are effectively avoided, and the life and property safety of people are ensured.

Description

technical field

[0001] The invention relates to a detection method, in particular to a pre-mining three-dimensional detection method of a coal seam in a working face, and belongs to the technical field of coal seam pre-mining geophysical prospecting. Background technique

[0002] The traditional pre-mining geophysical prospecting of the working face belongs to the narrow sense detection which takes the inside of the working face and the bottom of the working face as the main detection objects. It can only detect and evaluate whether there are hidden water-guiding structures and hidden water inrush hazards inside the working face and the bottom plate of the working face. It belongs to half-space detection and is a static detection based on the natural state of the working face before mining. There may be hidden water-conducting structures or water bodies in the area affected by the damage of the upper surface and surrounding rock formations, which may cause water inrush. [...