Construction method for broaching-brushing of winze

Abstract

The invention discloses a construction method for expanding and brushing the sky chute, which comprises the following steps: firstly, vertically opening a guide hole along the central line of the sky chute; The hole area is reamed from bottom to top; in the third step, after reaming, blast holes are arranged in the brush expansion area around the reaming area, and the brush holes are blasted from bottom to top to The brushing area is expanded, and the brushing area is expanded to the well wall of the sky chute. This construction method solves the problems of slow brush expansion speed and blockage of the chute, ensures construction safety and reduces construction cost.

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

Images