Method for forming cutting surface in deep hole blasting

Abstract

The invention discloses a method for forming a cutting surface in deep hole blasting, and relates to the technical field of underground mining blasting. The structure comprises a central charge hole (1), an empty hole (2), an auxiliary charge hole (3), cutting scallop holes (4) and emission centers (5). The structure achieves the purpose of deep hole blasting cutting, a recovery cutting process is simplified, cutting efficiency is improved, cutting cost is reduced, benefits are remarkable, ore recovery rate is increased, recovery cost is reduced, the cutting scallop holes are distributed in the double emission centers, cutting effects are improved, a cutting operation environment is effectively improved, the physical and psychological health of staff is guaranteed, cutting and recovery are integrated in production, three-grade reserve remaining period can be reduced, and the fund utilization efficiency of a mining engineering is improved.

Description

Technical field [0001] The invention relates to the technical field of underground mining blasting, in particular to a method for forming a cutting surface in deep hole blasting. Background technique [0002] In the domestic cutting process of the non-pillar sublevel caving method, the initial cutting free surface is mostly formed by manually using pneumatic rock drilling equipment (YG90 or YT28 rock drill), constructing a cutting patio or cutting chamber blasting (called traditional cutting method) ). The method of manual excavation and cutting engineering has outstanding problems such as low production efficiency, high labor intensity, poor working environment, and high production cost, and affects the subsequent ore mining work. [0003] 1. The traditional manual construction cutting project is carried out between the deep-hole drilling and deep-hole sinking procedures, which is an indispensable preparation for the stoping work. Affected by the manual excavation and cutting en...

AI Technical Summary

Problems solved by technology

Affected by manual excavation and cutting engineering, the deep hole drilling process of cutting work and the mining and falling process cannot form an organic connection, which affects the production efficiency of mining

[0004] 2. The traditional cutting method adopts manual excavation of the patio, which takes a long time for construction and low cutting efficiency

[0005] 3. Due to the traditional cutting method, the operator works in the patio, a large amount of dust and water mist are generated during the rock drilling process, the air pollution is serious, and the working environment is harsh, which greatly affects the physical and mental health of the operators.

[0006] 4. The production cost of the traditional cutting method is high

[0007] 5. The traditional cutting method causes high ore loss at the cutting part

The cutting method of cutting the patio is adopted. Since both sides of the patio are solid, it is necessary to further expand the free surface after the deep hole blasting in the construction. However, the expansion of the free surface is affected by the small cutting surface and the large force of the deep hole. The two sides of the small well are cut Poor effect, low ore recovery rate

If chamber blasting is used for cutting, the ore blasting at the cutting part will be uneven and the recovery rate will be lower

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