Full-staged combination drilling with blasting mining method

Abstract

The invention discloses a full-staged combination drilling with blasting mining method. A stage haulage roadway, an ore drawing access road and a cutting undercut roadway are arranged at the bottom of a room. The ore drawing access road serves as a haulage channel of caved ores in the whole stage. The undercutting roadway serves as a construction space of a fan-shaped medium-depth hole on the lower portion, the fan-shaped medium-depth hole is drilled upwards, and after blasting, trench undercut is formed. A cut raise is formed through one-time blasting of a large-diameter deep hole, and then a cut groove is formed through the cut raise to serve as an ore caving compensation space. A drilling chamber or a roadway which communicates with a transverse drift is formed on the top of the room to serve as a construction space of the large-diameter deep hole on the upper portion. The large-diameter deep hole and the fan-shaped medium-depth hole at the lower portion are combined for drilling. After the large-diameter deep hole and the fan-shaped medium-depth hole drilling is finished, the cutting groove serves as a free face and combined, or separate charging is conducted to blast for lateral caving. The mining and cutting engineering quantity is small, the preparation time of stoping is reduced greatly, the production capacity of the room is large, and the investment cost is saved.

Description

technical field [0001] The invention relates to the technical field of underground mining of ore deposits, in particular to a high-efficiency mining method for all-stage combined chisel blasting and ore removal. Background technique [0002] In order to improve the production capacity, labor efficiency and intrinsic safety of mining inclined or sharply inclined, medium-thick ore bodies in underground mines, the segmented mine method, the segmented rock drilling stage mine method and the VCR method are often used. However, the segmented mining room method is to divide the stage into multiple segments and each segment has an independent ore output structure. For mines, the VCR method needs to pull out the bottom of the whole section and has high requirements on the hole depth, deflection rate and ore rock stability of the drilling rig. The common disadvantage of the three methods is the large amount of mining and cutting. For this reason, a full-stage combined chisel blasting...

AI Technical Summary

Problems solved by technology

However, the segmented mining room method is to divide the stage into multiple segments and each segment has an independent ore output structure. For mines, the VCR method needs to pull out the bottom of the whole section and has high requirements on the hole depth, deflection rate and rock stability of the drilling rig. The common disadvantage of the three methods is that the mining and cutting work volume is large

Images