Arrangement method for excavation and blasting holes of large-diameter vertical shaft

Abstract

The invention provides an arrangement method for excavation and blasting holes of a large-diameter vertical shaft. The method comprises the following steps: determining layering and partitioning of excavation and blasting, where the layering of excavation and blasting is related to a multi-layer underground space, the layering of the excavation and blasting at least comprises a first layer and other layers, a height from the first layer to the ground is smaller than that from other layers to the ground, and partitioning of the excavation and blasting are related to an excavation size of the multi-layer underground space; and arranging blast holes on the first layer according to a preset first-layer blasting design parameter table, after the first-layer blasting is completed, arranging blast holes on other layers according to a preset other-layer blasting design parameter table, where the first-layer blasting design parameter table comprises a first-layer partition blasting design parameter table and the other-layer blasting design parameter table comprises other-layer partition blasting design parameter tables. A layered and partitioned excavation and blasting construction mode is used, a blasting range of each time can be controlled, disturbance of surrounding rock is reduced, a support can closely follow a working face, and therefore a water burst problem is effectively solved.

Description

technical field [0001] The invention relates to the field of excavation and blasting, in particular to a method for arranging blast holes for excavation and blasting of large-diameter shafts. Background technique [0002] Due to the large population and the shortage of land resources in our country, the research work on strengthening the scientific planning of underground space and the development and utilization of underground space has been paid more and more attention in the development of modern city construction. For the construction of underground multi-storey space, underground construction has the characteristics of complex hydrogeological conditions. At the same time, because the underground multi-storey space is buried deep and rich in high-pressure groundwater, there is disturbance of the surrounding rock during the blasting process, which is likely to cause water gushing problems. Contents of the invention [0003] The embodiment of the present invention provid...

AI Technical Summary

Problems solved by technology

For the construction of underground multi-storey spaces, underground construction has the characteristics of complex hydrogeological conditions. At the same time, because the horizontal plane of underground multi-storey spaces is deeply buried and rich in high-pressure groundwater, there is disturbance in the surrounding rock during the blasting process, which is likely to cause water gushing problems

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