Construction method for broaching-brushing of winze

Abstract

The invention discloses a construction method for broaching-brushing of a winze. The construction method comprises the following steps that (1) guiding holes are vertically formed along the center line of the winze; (2) through a counter-driller, the broaching area around the guiding hole is subjected to broaching from bottom to top; and (3) after broaching, a blasthole is formed in the broaching-brushing area around the broaching area, the blasthole is subjected to blasting from bottom to top so as to conduct broaching on the broaching-brushing area, and the broaching-brushing area is subjected to broaching-brushing to the well wall of the winze. Through the construction method, the problems that the broaching-brushing speed is low and the winze is blocked are solved, the construction safety is ensured, and the construction cost is reduced.

Description

technical field [0001] The invention relates to the technical field of ore body mining, in particular to a construction method for expanding and brushing a sky chute. Background technique [0002] In the mine construction and production stage, there are many mine pedestrian ventilation shafts, stope slide shafts, and middle section slide shafts. In order to ensure construction safety, raise drilling rigs are generally used for construction. [0003] When raising wells are used for construction, it is generally not possible to drill to the design section of the sky chute at one time, and it is necessary to expand the brush in the forward direction to expand the diameter to the design section. Existing technologies such as figure 1 and figure 2 As shown, the operation platform 31 is located in the drilling rig chamber 10 above the skyway 30, and the brushing area 34 of the skyway 30 is expanded in the forward direction, and the blast holes 35 are vertically arranged on the...

AI Technical Summary

Problems solved by technology

Existing technologies such as figure 1 and figure 2 As shown, the operation platform 31 is located in the drilling rig chamber 10 above the skyway 30, and the brushing area 34 of the skyway 30 is expanded in the forward direction, and the blast holes 35 are vertically arranged on the wall of the skyway; The pumice on the well wall needs to be inspected for every shot of brushing expansion, and temporary sprayed concrete support is required; the footage at one time is 3-4m, and the number of cycles is large; therefore, the existing technology is positively expanding the well wall, and the speed of expansion is slow. The construction speed is slow, the cycle footage is limited, and there are many large pieces of gravel during the construction process. The slag is lowered through the small-diameter well shaft, which can easily cause blockage of the skyway and cause safety hazards

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