Simultaneous shaft sinking method for segmented raise

Abstract

The embodiment of the invention discloses a simultaneous shaft sinking method for a segmented raise. The simultaneous shaft sinking method comprises the steps that a cutting mode is selected, specifically, a barrel-shaped cutting mode is selected; the hole diameter of a central cutting hole and the hole diameter of cutting empty holes are determined, specifically, the hole diameter of the centralcutting hole is phi 70 mm, and the hole diameter of the cutting empty holes is phi 127 mm; blast holes are arranged, specifically, four auxiliary holes and eight peripheral holes are selected to be arranged; the blasting segment height is determined, specifically, the central cutting hole, the auxiliary holes and the peripheral holes are all 10 m long, blasting is conducted three times, the firstlayer is 3.5 m, the second layer is 3.0 m, the third layer is 3.5 m, and the blasting sequence from bottom to top is adopted; the elementary error time is determined, specifically, a half-second delaydetonator is selected, a segment exists between every two adjacent segments, and the delay time is 1 s; and the charging structure and parameters are determined. According to the simultaneous shaft sinking method for the segmented raise, the raise operation environment is improved, the operation efficiency is improved, the medium-short raise construction safety risk is reduced, and the raise raising intrinsic safety is improved.

Description

technical field [0001] The invention relates to a raised well forming process at one time, in particular to a method for forming a segmented raised well at one time. Background technique [0002] Patios are widely used in military and civil engineering. Traditional raise excavation mostly adopts ordinary air-leg rock drills to blast in low sections from bottom to top. In traditional well excavation, the staff need to work in the well, the labor intensity of the workers is high, the dust concentration of the working flour is high, the working conditions are poor, and the safety is not high, which can easily cause safety accidents such as falling from heights, gun smoke poisoning, and roof fall. At the same time, the construction patio needs to repeatedly build and disassemble the safety work platform, which has low work efficiency and high cost consumption. The well blasting technology of medium and deep holes prevents the staff from entering the well, improves the working ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the embodiments of the present invention is that, for the traditional raised well excavation, the staff need to work in the well, the labor intensity of the workers is high, the dust concentration of the working flour is high, the working conditions are poor, the safety is not high, and it is easy to cause falling from a high place , gun smoke poisoning, roof fall and other safety accidents, a method for segmented patio wells to be completed at one time was proposed

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