Positioning device and method for tunnel oblique hole slotting blast hole

Abstract

The invention discloses a positioning device and method for a tunnel oblique hole slotting blast hole. The device comprises a blast hole positioning mechanism which is attached to the tunnel face of atunnel, and the blast hole positioning mechanism is connected with a blast hole angle adjusting mechanism located on the outer side of the tunnel face of the tunnel through a connecting mechanism; ablast hole positioning ring is arranged on the blast hole positioning mechanism, and the circle center of the blast hole positioning ring coincides with a blast hole identification point; an angle adjusting ring is arranged on the blast hole angle adjusting mechanism, and the circle center of the angle adjusting ring and the circle center of the blast hole locating ring are located on the same horizontal plane; and the angle adjusting ring is used for moving relative to the blast hole positioning ring on the same horizontal plane so as to adjust the inclined angle of a drill rod penetrating through the blast hole positioning ring and the angle adjusting ring. According to the device and the method, the inclined angles of slotting blast holes can be ensured to meet the design requirements,the bottoms of the plurality of slotting blast holes can be arranged on one vertical surface, so that the preset slotting effect can be achieved, and meanwhile, the device can be repeatedly used and can be applied to the condition of multiple slotting angles.

Description

【Technical field】 [0001] The invention belongs to the technical field of tunnel blast hole cutting, and in particular relates to a positioning device and method for tunnel blast hole cutting and blast hole. 【Background technique】 [0002] In the process of tunnel construction, the cutting hole is used to blast out a new free surface and provide a free surface for the entire tunnel blasting. The quality of the cutting effect plays a decisive role in the cycle progress. Slant eye cutting is a commonly used cutting method for tunnel blasting excavation, which requires a small number of blast holes and is easy to throw out broken rocks. [0003] The method of squint cutting is generally manual hand-held pneumatic drill for squint cutting. However, in the process of manual squint cutting, it is difficult to control the angle of the squint cutting blast hole. There are two main control methods at present, one is to use the experience of the construction personnel to visually dril...

AI Technical Summary

Problems solved by technology

[0004] The first method requires the construction personnel to have rich experience and rely on experience to evaluate the angle of the blast hole. This method has a large error due to the influence of the construction personnel's supervisory experience

In the second method, the ray of the laser transmitter can provide a reference for the angle of the squint-eye cutout on the horizontal plane, but there is still a certain error in the vertical direction

Both of these two methods lead to a certain error between the angle of the obliquely cut blast hole and the angle of the designed cut blast hole, and then the fundus of the cut blast hole is not on a vertical plane, and the cutting effect is low, which affects the blasting effect of the tunnel. Ended up prolonging the tunnel construction schedule

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