A blasting system for subway shield boulder and protruding rock blasting

Abstract

The invention discloses a blasting system for blasting boulders and protruding rocks in metro shielding and belongs to the field of engineering blasting. The system comprises a boulder detection unit,a position pre-estimating unit, an image collecting unit, a layer modeling unit, a design unit, an interlocking control unit and an exploder unit, wherein the boulder detection unit is loaded on a cutterhead of a shield tunneling machine to measure heading parameter changes of a shield tunneling mechanism; the position pre-estimating unit combines the heading parameter changes of the shield tunneling mechanism to pre-estimate positions and sizes of the boulders according to a distance of the shield tunneling machine which travels; the design unit designs steps according to a model to judge direct blasting construction or in-hole pre-reinforcement directly; and the exploder unit controls explosion according to a signal in the interlocking control unit. According to the technical scheme, the sizes and surface areas of the protruding rocks can be pre-estimated according to a linear image of the cutterhead of the shield tunneling machine which operates, so that secondary surveying and mapping are avoided. Meanwhile, an information processing unit is an intermediate transfer station which transfers blasting net diagrams, postils and implementing dynamic states to prevent information errors, so that the construction accuracy is improved.

Description

technical field [0001] The invention belongs to the field of engineering blasting, in particular to a blasting system used for blasting subway shield boulders and protruding rocks. Background technique [0002] In the tunnel excavation section, there are two or more heterogeneous strata with very different geotechnical and engineering geological characteristics, which are called composite strata. The inhomogeneity of the complex stratum and the limitations of the shield equipment make it necessary to consider the construction auxiliary method and the adaptation of the shield machine in the shield construction. The underground boulder group (spherical weathered rock) is one of the typical composite strata. [0003] During the construction of the shield tunneling method, boulders of different sizes will be encountered, and the strength of these boulders will vary, making the rock and soil layers in the tunnel uneven in hardness. In this type of stratum, the excavation effici...

AI Technical Summary

Problems solved by technology

[0005] However, due to the unreasonable laying of the explosive network in the prior art blasting, tunnel collapse or tunnel fracture may occasionally be caused, affecting the construction progress. Therefore, it is a major research direction of contemporary geotechnical engineering to use the blasting system to set up a reasonable blast network.

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