Drilling deviation rectification method for 60-meter-long hole drilling of tunnel large pipe shed

Abstract

The invention discloses a drilling deviation rectification method for 60-meter-long hole drilling of a tunnel large pipe shed. The method comprises the steps that a guide probe arranged on the rear portion of a drill bit monitors the orientation of a facing angle and the deviation direction of the drill bit; a signal line penetrating through a drill pipe is connected to a display screen located at a drill machine operation table; the display screen displays the inclination angle, namely, the horizontal angle, of the drill bit and the facing angle, namely, the direction of a guide plate; and the drilling direction is adjusted according to the inclination angle and the facing angle displayed by the display screen. The wedge face of the drill bit is adjusted to be in the deviated direction; and after a drill machine is stopped from rotating, stress application jacking is carried out, the drill bit deviates in the opposite direction due to the action of a slope, and therefore the drilling direction is adjusted. The drilling deviation rectification method has the advantages that a 60-meter-long drilling hole is formed in a single drilling process; the construction period is greatly shortened; great economic benefit is obtained; the drilling quality is ensured; and safety guarantee is provided for construction in the next step.

Description

technical field [0001] The invention relates to a deviation correction method used in the drilling process of a long pipe shed at the entrance section of a tunnel, in particular to a deviation correction method for drilling a large pipe shed in a 60-meter-long tunnel, which belongs to the tunnel drilling field. Background technique [0002] At present, the common pipe shed construction at the entrance of the tunnel, especially in the drilling process of the long pipe shed at the tunnel entrance, has the following disadvantages: (1) the length of the pipe shed for one construction is short, generally 10 to 30 meters; The longer the drilling length during the construction of the shed, the position and direction of the drilling cannot be guaranteed due to the weight of the drill bit and the drill pipe and the geological conditions; , Angle back calculation Theoretically, the position of the drill bit has many uncertain factors, resulting in the inability to guarantee the drill...

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Problems solved by technology

[0002] At present, the common pipe shed construction at the entrance of the tunnel, especially in the drilling process of the long pipe shed at the tunnel entrance, has the following disadvantages: (1) the length of the pipe shed for one construction is short, generally 10 to 30 meters; The longer the drilling length during the construction of the shed, the position and direction of the drilling cannot be guaranteed due to the weight of the drill bit and the drill pipe and the geological conditions; , Theoretically, the position of the drill bit is calculated in reverse angle, and there are many uncertain factors, resulting in the inability to guarantee the drilling quality

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