A kind of blasting particle size control method for inclined well

Abstract

The invention discloses a method for controlling the blasting particle size of inclined wells. The control methods include blasting design, measuring and setting out, drilling, charging, and in-line blasting; blasting design includes blasting aperture, hole spacing, hole depth, resistance line, charge structure, and blasting network design; in-line blasting is blasting network and blasting Among them, the network design of the blasting design is to set the blasting center of the inclined well outward in sequence as the first circle, the second circle, ..., the Nth circle, and the peripheral circle, with auxiliary blasting holes arranged at intervals on each circle, and the peripheral circle Peripheral holes are arranged on the top; central holes are arranged between adjacent rings, and each central hole and the adjacent four auxiliary holes or shaft side holes form a diamond-shaped and central hole arrangement. The present invention changes the conventional gently inclined shaft construction using the forward one-time excavation method and the climbing tank construction technology, realizes the slowly inclined shaft slag slippage by controlling the blasting particle size of the inclined shaft, and breaks through the construction technology and method of the gently inclined well. Particle size control to achieve controllable safety, cost, construction period and occupational health.

Description

technical field [0001] The invention belongs to the technical fields of hydropower and hydraulic engineering and civil defense engineering, in particular to the technical field of excavation and blasting of ultra-deep gently inclined inclined wells, and particularly relates to a particle size control blasting method for ultra-deep gently inclined inclined wells. Background technique [0002] There are more and more inclined well designs and arrangements in the fields of hydropower, water conservancy and civil defense engineering, and the inclination angle of inclined wells that meet the requirements of escape channels and cable laying is getting slower and slower. Usually, the inclination angle of 6°<α≤48° is called a gentle inclination angle. Inclined well; the slag slug in inclined well is greatly affected by the inclination angle, blasting particle size and the size of the slag slug well, while the slag slug well in the inclined well with slow inclination angle is limit...

AI Technical Summary

Problems solved by technology

[0003] It is particularly important to control the blasting particle size and blasting method. Generally, the inclined shaft with a slight inclination is excavated in the forward direction and the tank climbing method is used for construction. Construction safety risks, occupational health and construction efficiency cannot be guaranteed, and even well blockages may cause safety accidents.

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