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Method for tunnel smooth blasting drill construction

A construction method and smooth blasting technology, which is applied to drilling equipment and methods, blasting, tunnels, etc., can solve problems such as increased project cost, increased slag output and lining amount, unfavorable downstream processes, etc., and avoid stress concentration , reduce the secondary disturbance, and ensure the effect of construction safety

Inactive Publication Date: 2017-02-01
NO 1 CONSTR ENG CO LTD OF CHINA CONSTR THIRD ENG BUREAU CO LTD
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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.

Method used

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  • Method for tunnel smooth blasting drill construction
  • Method for tunnel smooth blasting drill construction
  • Method for tunnel smooth blasting drill construction

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Embodiment Construction

[0016] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0017] Such as figure 2 As shown in the figure, construction preparations are carried out for smooth blasting blasthole layout: along the contour line of the tunnel arch, the blastholes are arranged circle by circle. Mark the positions of the cut holes and peripheral holes, and drill holes in strict accordance with the design position, depth, angle and diameter of the blast hole. Among them, the angle of the blast hole is particularly important, which directly affects the effect of smooth blasting. The control of the blast hole angle is controlled by the "drilling rig direction controller".

[0018] Such as figure 1 Sho...

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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...

Claims

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Application Information

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IPC IPC(8): E21B7/04E21B1/00E21B44/00E21D9/00F42D1/00
CPCE21B7/04E21B1/00E21B44/00E21D9/006F42D1/00
Inventor 高波梅支耀钱叶存张弓
Owner NO 1 CONSTR ENG CO LTD OF CHINA CONSTR THIRD ENG BUREAU CO LTD
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