Method for controlling precision of drilling trajectory

Abstract

The invention discloses a method for controlling the precision of a drilling trajectory. The method includes the following steps that a predetermined trajectory of a drill rod is determined; a main shaft of the drill rod is divided into finite elements, and the parameter, element mass (please see the description), total weight M and rigidity K of the rill rod are obtained; According to the formula (shown in the description), drill rod offset control is conducted, the allowable offset Ep is set, the rotating speed Omega of the drill rod can be obtained through MATLAB software, in the drilling process, by controlling the drilling speed, the water supply amount of a main pump is reduced, the pressure of water in a hole is reduced, and the actual drilling trajectory is controlled. When the method is applied to control over precision of guide hole digging trajectory of raise-boring machine, related parameters are obtained, a drilling scheme is formulated, after offset occurs, according to the requirement of the scheme, the drilling speed is increased, the method is cooperated with the GPS in use, by controlling the rotation speed and the drilling angle of the drill rod in the inclined shaft excavation process, the drilling depth is positioned in the construction process, and the inclined shaft construction with the guide hole trajectory precision controlled can be achieved.

Description

technical field [0001] The invention relates to a technology for controlling the accuracy of excavation holes in inclined shafts, which belongs to the engineering accuracy control and construction technology of inclined shaft excavation, and in particular relates to a method for controlling the accuracy of guide hole trajectory. Background technique [0002] With the current rapid development of my country's engineering construction, domestic hydropower resources continue to develop to remote, deep mountains and canyons. There will be more and more inclined shaft excavation, especially the construction of gentle slope inclined shafts for hydropower projects. The construction is becoming more and more difficult, and corresponding measures need to be taken. The construction technical measures and technical research results are used to solve a large number of problems faced in the construction of gentle slope inclined shafts. [0003] For the construction of inclined shafts, fir...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to provide a method for controlling the accuracy of the drilling trajectory of the raised well, which can solve the problem caused by the deviation of the drill pipe when drilling along the specified inclination during the excavation of the inclined well.

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