Hard rock drilling method and device

Abstract

The invention discloses a hard rock drilling method and device. The hard rock drilling and splitting method includes: drilling slot holes on the preset contour line of the face, drilling splitting holes on each preset splitting line, and performing splitting in the splitting holes on each preset splitting line. split operation; wherein, the preset contour line is a closed circular line, there are at least two preset endpoints on the preset contour line, and a point within the range delineated by the preset contour line is the preset midpoint, and the preset midpoint and The connection lines of the preset endpoints constitute the preset splitting lines respectively. Drill slots on the preset contour line of the face, and clearly divide the splitting space, which can effectively avoid overcutting and undercutting. Drilling split holes and performing splitting operations, so that the drilling-splitting-slag operations can be carried out in an orderly manner, which is conducive to improving construction efficiency.

Description

technical field [0001] The invention relates to the technical field of tunnel excavation, in particular to a hard rock drilling and splitting excavation method and device. Background technique [0002] Drilling and blasting method and TBM tunneling method are commonly used construction methods in tunnel excavation engineering in rock strata. Due to a series of problems caused by blasting, such as impact, noise, dust, poisonous smoke, flying stones and so on in drilling and blasting construction, the restrictions are being imposed. It is becoming more and more strict, especially in densely populated and built-up areas such as cities, and it is basically unusable; due to the limitation of the rock-breaking ability of the hob in TBM excavation, in areas with high rock strength and good integrity, there are tools and energy High consumption and slow excavation speed have caused problems such as delays in construction period and rising costs. In particular, TBM has high cost and ...

AI Technical Summary

Problems solved by technology

To split the rock, it is necessary to pre-create a free surface for the displacement of the rock block. At present, it is mainly realized by intensive drilling. There is no obvious limitation on the scope of construction on the drill face, and it is difficult to avoid over- and under-excavation.

Images