Rapid constructing method for enabling vertical shaft pit shaft to pass through magmatic rock with large thickness

Abstract

The invention discloses a rapid constructing method for enabling a vertical shaft pit shaft to pass through a magmatic rock with large thickness. The method comprises the following steps: the vertical shaft pit shaft is constructed at a rock mass of which the protodikonov's hardness coefficient f which is equal to 15-18, and the drilling footage of blast each time is 3.8-4.1 m; a high-quality high-strength alloy drill bit is adopted for drilling; powder charging is carried out piece by piece and fragment by fragment; the vertical shaft pit shaft is drilled by an umbrella drill; borehole drilling is carried out in a parallel sectional squeezing type double-stage cut way; a hollow hexagonal steel finished drill shank with the length of 4.7m and the wall thickness of 25 mm and a cross-shaped drill bit with the diameter of 52 mm are used for drilling a shooting oylet with the depth of 4.4 m; T330 high-strength water-gel explosive with a stick with a large diameter of 45*400 mm is adopted; and magnadets on a section 1, a section 3, a section 4, a section 5 and a section 7 are ignited; a cable with a specifications of 3*25+1*10 is selected as the blasting bus; and a high-frequency blaster is used for blasting construction.

Description

technical field [0001] The invention relates to a shaft shaft construction technology, which is especially suitable for the rapid construction technology of the shaft shaft through large-thickness magmatic rock (hard rock), and is used in the construction of shaft shafts in coal mines to pass through rocks with a Platts hardness coefficient f>6. Construction technology of high hardness sandstone and magmatic rock. Background technique [0002] At present, most vertical shaft shafts use large hoists, large buckets, umbrella drills, large rock grabbers, large overall metal formworks, and concrete mixers with large production capacity and large loaders with self-unloading trucks through the large-thickness magmatic rock construction plan. Vertical shaft mechanized operation line mainly with gangue, umbrella drill drilling, 4.2m deep hole smooth surface and smooth bottom blasting, center rotary rock grabbing machine for rock loading, two sets of single hook bucket lifting, se...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is: to solve the problem that the construction progress of shaft shaft is slow through large-thickness magma rock (hard rock), to speed up the construction speed of shaft hard rock, and to solve the key rock drilling and blasting technology of a shaft shaft through large-thickness magma rock rapid construction method