Directional drilling method for cross-border mined-out area

Abstract

The invention discloses a directional drilling method for a cross-border mined-out area. The directional drilling method for the cross-border mined-out area comprises the following steps that S101, data of a mine drilling area and the cross-border mined-out area are collected; S102, a drilling scheme is determined according to the collected data; S103, drilling operation is carried out between thecross-border mined-out area and the mine drilling area according to the drilling scheme to form an arc-shaped drilling track, and the drilling track circles the cross-border mined-out area. Accordingto the directional drilling method for the cross-border mined-out area, the cross-border mined-out area is circled by the arc-shaped drilling track, the number of drill holes is reduced, the construction efficiency is improved, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of advanced detection, in particular to a directional drilling method aiming at cross-boundary mined-out areas. Background technique [0002] There are abandoned goafs and small coal kilns in the shallow part of many mining areas in my country. Old empty water is formed after these abandoned goafs and small coal kilns accumulate water. The geometric shape of these old empty water is irregular, and the water volume can reach Millions of cubic meters, once the mining face is close to or exposed, it often causes water inrush and flooding and personal casualties, which poses a great threat to the safety of coal mine production. [0003] There are 11 local small coal mines around the mine of Halagou Coal Mine, most of which have cross-border mining, which poses a major threat to the safety of mine roadway excavation. When excavating close to the boundary of the mine field, in order to prevent accidents in the goaf crossing...

AI Technical Summary

Problems solved by technology

[0004] The head of roadway excavation is 200m away from the boundary of the minefield or the goaf. In order to ensure that the detection side distance reaches 20m, the horizontal distance between the final hole of a single hole is not greater than 3m. 14 holes need to be constructed each time, and the depth of a single hole is 70m. , the allowable excavation distance is 40m, and a total of 70 boreholes need to be constructed 5 times. Generally, 1-2 boreholes can be constructed per shift, and at least 7 shifts are required for each construction. During the drilling process, the excavation head needs to stop production. The production impact of the excavation face is large, the number of holes is large, the construction frequency is high, the impact on the excavation efficiency is serious, and the cost is high

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