Method for tunnel smooth blasting drill construction

Abstract

The invention discloses a method for tunnel smooth blasting drill construction. The method comprises the steps of installing a drilling rig direction controller on a rock drill, wherein the drilling rig direction controller is used for directly displaying up-and-down and left-right deflection directions of a drilling rig; before the rock drill enters a tunnel, performing line element section segmentation on a tunnel center line, calculating an azimuth of each section of tunnel center line according to the line element section, wherein the line element section comprises a straight line section, a straight easement section, an easement circular section, a circular curved section, a circular easement section and an easement straight section; the azimuth is an included angle alpha of each section of tunnel center line and the true north direction; after the rock drill enters the tunnel, setting the angle of the drilling rig direction controller as the angle alpha for each section of tunnel, causing a drilling rig manipulator to perform drilling according to the angle alpha, guaranteeing that drilling is performed according to the designed drilling rig direction, and thus a periphery hole depth is controlled. According to the method, extensive type construction by experience during hand excavation is solved, and precise positioning in the rock drill drilling direction during tunnel excavation is achieved.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a tunnel smooth surface blasting drilling construction method. Background technique [0002] Tunnel excavation is the closing process in tunnel construction. Too much over-excavation will not only increase the project cost due to the increase of slag discharge and lining volume, but also cause stress concentration due to local over-excavation, which will affect the stability of surrounding rock. Under-excavation directly affects the thickness of the lining and must be dealt with, which is time-consuming and laborious. Therefore, over- and under-excavation must be well controlled in tunnel excavation, which is not conducive to the normal progress of the next process. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a tunnel smooth surface blasting and drilling construction method for the defects in the prio...

AI Technical Summary

Problems solved by technology

Too much over-excavation will not only increase the project cost due to the increase of slag discharge and lining volume, but also cause stress concentration due to local over-excavation, which will affect the stability of surrounding rock

Under-excavation will directly affect the thickness of the lining and must be dealt with, which is time-consuming and laborious. Therefore, over- and under-excavation must be well controlled in tunnel excavation, which is not conducive to the normal operation of the next process.

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