Cutting method combining deep hole cutting and small well cutting

Abstract

The present invention provides a cutting method combining deep hole cutting and small well cutting, and belongs to the technical field of ore belt mining. The invention adopts a cutting process combining deep hole cutting and small well cutting, not only cancels the roadway cutting, simplifies the cutting process, and reduces cutting cost significantly, but also provides an experimental basis to realize cutting of deep hole cutting blasting, and has strong promotion and application value. Medium-length holes on both sides of the small well are cut by dual radiation center construction. Taking the small well as a free surface, delay blasting is performed from small well center to the two sides to realize medium-length hole blasting pull trough without roadway cutting, and blasting initial free surfaces are created for follow-up blasting of medium-length hole breaking ground. The long axis direction of a cutting well is perpendicular to the row surface of the cutting deep hole, and the length direction is greater than the row spacing of the cutting deep hole, therefore the deep hole blasting gets the maximum free surface, greatly enhancing the blasting success rate which can reach 100%.

Description

technical field [0001] The invention belongs to the technical field of ore belt mining, and relates to a trough cutting method of a bottomless pillar sub-caving method, in particular to a cutting method combining deep hole cutting and small well cutting. Background technique [0002] The pillarless segmented caving method has outstanding advantages such as high strength, high efficiency, low cost, simple process, high degree of mechanization, and safe production, and has been widely used in well mining and mine mining. The cutting groove construction is the most important part in the mining process of well mining mines, and it is also an important subject of research in the production of various mines. The cutting process of traditional ore mining adopts the cutting chamber or the cutting method combining deep hole and cutting chamber. Because this cutting method requires the construction of cutting tunnels and cutting chambers, the amount of mining and cutting is large, th...

AI Technical Summary

Problems solved by technology

Because this cutting method requires the construction of cutting tunnels and cutting chambers, the amount of mining and cutting is large, the construction of cutting chambers is difficult, the working environment is harsh, the construction time is long, and the cost of chamber blasting is high, and the damage caused by blasting is relatively large. Therefore, it is beneficial to improve labor production efficiency and reduce ore mining costs by researching and finding reasonable new cutting methods and straightening out the relationship between cutting work and mining work.

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