Energy-gathering buffering device for improving tunnel smooth blasting effect and blasting method utilizing same
A technology of smooth blasting and buffer devices, which is applied in blasting and other directions, can solve the problems of uneven transmission of detonation waves, weak blasting directivity, and difficulty in keeping excavation contour lines from exceeding or undershooting, so as to prevent mixing, Effects that increase stability and usability
Active Publication Date: 2021-06-22
NANJING UNIV OF TECH +1
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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.
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