Method and device for detecting water body in advance area of multi-aquifer arborescence directional drilling of top plate

Abstract

The invention relates to a method and device for detecting water body in advance area of multi-aquifer arborescence directional drilling of top plate. According to the invention, a drilling geologicalguide directional drilling tool is used for carrying out arborescence directional drilling construction, the drilling trajectory is controlled to extend along the designed aquifer and the designed trajectory, and the water body is thinned after the holes are formed; the arborescence directional drilling is composed of a main hole and a plurality of upward arborescence holes, wherein the main holeextends along the lower aquifer for a long distance and is used for detecting the water body in the lower aquifer; the upward arborescence holes passe through the upper aquifer and is used for detecting the water body in the upper aquifer. According to the invention, the problems of low water body detecting efficiency, large detecting error, high treatment cost and the like when the number of thewater layers of the top plate of the coal layer is large is solved, the method has the advantages of high detection efficiency, small construction quantity, high detection precision, wide coverage area and the like, realizes the advanced detecting of the water body of multi-aquifer for once and ensures the safe and efficient coal mining.

Description

technical field [0001] The invention relates to a method and device for detecting and discharging water body in an advanced area, belonging to the technical field of coal mining, in particular to a method and a device for detecting and releasing water body in an advanced area by dendritic directional drilling with multiple aquifers on the roof. Background technique [0002] The hydrogeological conditions of coal occurrence in my country are relatively complex. Roof water damage is one of the main types of coal mine water damage in my country. It is extremely destructive and brings great hidden dangers and losses to coal mine safety production. With the depletion of shallow resources, coal mining gradually develops into areas with large buried depth, high ground stress and strong water abundance, and mine roof water damage presents high frequency and strong hazard characteristics. [0003] It is one of the effective ways to avoid roof water damage accidents by using drilling ...

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Problems solved by technology

[0003] It is one of the effective ways to avoid roof water damage accidents by using drilling holes to detect and discharge roof water in advance. At present, roof penetration drilling or conventional directional drilling are mainly used for water detection and drainage, and there are the following problems: ①Current mining The development of water-conducting fissure zones is mainly obtained by theoretical calculation or numerical simulation, and there is a deviation from the actual value. The hydrogeological data on the roof of some coal mines is simple, and the number of aquifers on the roof is large. Grasp; ② The depth of the roof penetration drilling is shallow, the trajectory cannot be measured and controlled, the construction work is large, and the construction needs to be carried out after the mining roadway is formed, the water drainage time is short, and the roof water exploration and release in the advanced area cannot be realized, which is not conducive to the expansion of the production scale of the mine long-term planning requirements; ③Conventional directional drilling can extend along the water body for a long distance, but it is guided by the geometric trajectory of the drill hole. put

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