Slope Cutting Method of Shallow Hole Step Controlled Blasting in Road Cutting in Complex Environment

Abstract

The invention relates to a method for controlling blasting and slope cutting of road cutting shallow hole steps under a complex environment. The method comprises the following steps that (1) the road cutting slope cutting excavation range and workload are checked; (2) the surrounding environment of a slope cutting and blasting area is surveyed on side and actually measured; (3) a reasonable blasting scheme and blasting devices are selected; (4) blasting control parameters are designed and calculated; (5) blasting safety distance estimation and safety checking are carried out; (6) blasting safety protection of the complex environment is carried out; and (7) the blasting effect is checked. According to the method for blasting and slope cutting of a road cutting, a reserved partition and longitudinal pull trench excavation is adopted; a town shallow hole multi-row millisecond blasting control method is adopted in partitions and partition stonework; the process is carried out layer by layer from top to bottom; a layer-by-layer pull through manner is adopted in longitudinal pull trenches so as to facilitate muck removal and accelerate the construction progress; and smooth blasting is adopted in the positions close to last slope lines so as to protect the integrity and stability of slope surrounding rock. The method is high in economic performance, safety and systematicness and can provide reliable method support for highway and railway road cutting slope cutting and blasting excavation under the complex environment.

Description

technical field [0001] The invention relates to the technical fields of highway engineering, side slope engineering, engineering blasting and rock mechanics, and in particular to a slope cutting method for shallow hole step control blasting in a complex environment. Background technique [0002] With the improvement of the national economic level and the development of basic economic construction, there are more and more road and railway construction projects in our country. The progress of road cutting excavation is the key to determine the entire construction period. Due to the constraints of the surrounding environment, it is difficult for many projects to be constructed quickly and efficiently, and it is difficult to protect the existing adjacent facilities from being damaged by the blasting process. To protect the safety of construction workers and reduce the impact of blasting and excavation on the normal operation of existing surrounding buildings (structures), factor...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an efficient and economical method for cutting slopes by controlled blasting of shallow hole steps in cuttings in complex environments, which can overcome the safety accidents and low quality of slope cutting in cutting blasting excavations in complex environments in the prior art. Difficult to control and likely to affect the use of adjacent buildings and structures, and likely to cause technical defects such as damage to existing facilities

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