Blasting method for reducing large rock blocks in strip mine

Abstract

The invention discloses a blasting method for reducing large rock blocks in a strip mine. The blasting method comprises the following steps of blasting parameter selection, explosive hole forming, explosive filling, water bag filling and blasting. According to the blasting method for reducing the large rock blocks in the strip mine, through reasonable blasting parameter selection, the rock crushing effect is effectively improved, crushing is more sufficient and uniform, explosion gas products can be prevented from rushing out of the hole too early, the flying distance of flying rocks is reduced, safety is improved, the situation that explosives are excessively concentrated at the bottom of the explosive hole is avoided through sectional type charging, therefore, ore rocks at the bottom of the deep hole, in the middle of the step and on the upper portion of the step are blasted to the same degree, the large rock blocks formed due to uneven blasting are reduced, shoveling and transporting are facilitated, the efficiency of open-pit mining is improved, the problem that secondary blasting is needed is solved, the explosive hole is filled with the water bag, the inert rock powder is removed in the explosive hole, and the explosive hole is blocked by the humid loess, so that dust generated by blasting is effectively reduced, the ecological environment is protected, and the method is worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of open-pit mine blasting, in particular to a blasting method for reducing large pieces of rock in an open-pit mine. Background technique [0002] Blasting is a technology that uses the compression, loosening, destruction, throwing and killing effects of explosives in air, water, soil-rock media or objects to achieve the intended purpose. The explosive package or charge explodes in soil-rock media or structures When the earth-rock medium or structure is compressed, deformed, destroyed, loosened and thrown, it is mainly used for earthwork engineering, and the demolition of metal buildings and structures, while open-pit mine blasting refers to the use of explosives and explosives in open-pit mining. The blasting device is loaded into the prepared hole in the open pit and crushed ore rocks according to the mining operation requirements. The basic requirements for open pit mine blasting are sufficient blasting v...

AI Technical Summary

Problems solved by technology

[0003] Most of the traditional open-pit blasting methods are complicated to operate. During the blasting process, the broken rocks will be uneven in size, and the flying rocks will be far away, which is prone to safety hazards. Moreover, large rocks will still be produced after blasting, and large rocks are not easy to shovel. It not only reduces the efficiency of open-pit mining, but also increases the workload of secondary blasting, and also affects other mining operations. In addition, traditional open-pit blasting methods will generate a lot of dust during the blasting process, which is harmful to the ecology. The environment has also caused pollution, which is not conducive to popularization and use. Therefore, the present invention proposes a method of blasting to reduce large pieces of open-pit rock to solve the problems in the prior art

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