Energy-saving and environment-friendly digital detonator hydraulic blasting charge structure for tunnels

Abstract

The invention relates to an energy-saving and environment-friendly digital detonator hydraulic blasting charging structure for tunnels. The structure comprises a peripheral hole, an auxiliary hole anda cutting hole, wherein the peripheral hole is formed in the outermost ring of the surrounding rock of a tunnel face, the auxiliary hole and the cutting hole are formed in the inner ring. A discontinuous peripheral hole charging structure is arranged in a blast hole of the peripheral hole, the peripheral hole charging structure comprises a first bottom explosive roll, a first water bag, a first reinforcing explosive roll, a second water bag, a second reinforcing explosive roll, a third water bag, an energy-saving explosive roll, a fourth water bag and first sealing gun mud which are arrangedat the bottom of the blast hole of the peripheral hole; a first detonating cord is arranged in the first bottom explosive roll, the first detonating cord sequentially penetrates through the first reinforcing explosive roll, the second reinforcing explosive roll, the energy-saving explosive roll and the first sealing gun mud, and a first digital electronic detonator with a detonating tube is arranged at one end outside the blast hole of the peripheral hole; and both the auxiliary hole and the cutting hole adopt a traditional charging structure of sequentially conducting continuous charging, additional arranging of a fifth water bag and sealing through second sealing gun mud. The charging structure is safe, reliable, energy-saving, environment-friendly, simple and easy to operate, and is suitable for initial excavation work of rock tunnel III and IV surrounding rocks.

Description

technical field [0001] The invention relates to the technical field of road engineering and railway engineering tunnel construction, in particular to an energy-saving and environment-friendly digital detonator hydraulic blasting charge structure for tunnels. Background technique [0002] With the continuous development of society and economy, the technical difficulty of road construction is constantly increasing, and there are more and more roads and long tunnels passing through mountainous areas. However, the blasting construction technology of most tunnels in China still stays in the traditional stage of high investment, high energy consumption, and extensive management. This not only increases the amount of explosives during blasting, but also creates unevenness on the surrounding rock of the arch circle after blasting. In the case of over- and under-excavation, over-excavation parts need to be resprayed with shotcrete. The excessive consumption of explosives and concret...

AI Technical Summary

Problems solved by technology

The disadvantage of this charge structure is that the excessive concentration of the charge results in the concentration of blasting energy, which in turn causes damage to the surrounding rock, resulting in large-area over-excavation and crushing of the surrounding rock.

At the same time, if the blast hole is not sealed, a part of energy will be lost from the hole

Moreover, the dust and smog formed after the blasting are particularly large, which not only cause physical injury to the construction workers in the cave, but also waste time and power resources due to the prolongation of the ventilation and dust reduction process.

Images