Energy-gathering buffering device for improving tunnel smooth blasting effect and blasting method utilizing same

Abstract

The invention relates to an energy-gathering buffering device for improving the tunnel smooth blasting effect, which comprises a plurality of PVC outer pipes which are detachably connected and partition plates arranged in the PVC outer pipes. The partition plates are used for blocking and guiding energy during blasting, the inner walls of the PVC outer pipes are partitioned by the partition plates in the circumferential direction into energy-absorbing material parts and explosive parts, the central angle corresponding to each energy-absorbing material part is smaller than that corresponding to the corresponding explosive part, the explosive parts are used for installing explosive cartridges, energy-absorbing foam is installed in the energy-absorbing material parts and used for reducing disturbance and damage to surrounding rock on the outer side of an excavation contour line during explosion, and flame-retardant cloth is attached to the outer side of the energy-absorbing foam. According to the energy-gathering buffering device for improving the tunnel smooth blasting effect, through the arrangement of the partition plates, the volumes of the energy absorption material parts and the explosive parts can be adaptively changed so as to adapt to installation of explosive cartridges of different sizes, and the requirements of the field environments of different surrounding rock qualities can be met; and the energy-absorbing foam is arranged, so that explosion energy which cannot be blocked can be absorbed, the partition plates can reflect the energy during explosion, and the energy generated during explosion can be effectively guided.

Description

technical field [0001] The invention relates to the technical field of blasting devices, in particular to an energy-gathering buffer device for improving the blasting effect of smooth surfaces in tunnels. Background technique [0002] Smooth surface blasting is a type of tunnel controlled blasting. The peripheral eye is blasted after the rock mass in the designed tunnel section is blasted and collapsed, so that the outline of the tunnel section after blasting is neat, and the disturbance and damage of the blasting to the surrounding rock are minimized. The smooth surface blasting requires the explosive to be uncoupled, that is, the diameter of the explosive is smaller than the diameter of the blasthole, and there is a gap between the explosive and the blasthole wall. In the prior art, the contact gap between the charge column and the blast hole is large at the top and small at the bottom, the detonation wave is transmitted unevenly in the blast hole, the blasting directiona...

AI Technical Summary

Problems solved by technology

In the prior art, the contact gap between the charge column and the blast hole is large at the top and small at the bottom, the detonation wave is transmitted unevenly in the blast hole, the blasting directionality is not strong, the disturbance to the surrounding rock cannot be fundamentally reduced, and the excavation contour is difficult to achieve no more than no less

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