Large collapse rock blasting method under precise control of digital electronic detonators

Abstract

The invention belongs to the technical field of blasting, and particular relates to a large collapse rock blasting method under precise control of digital electronic detonators. The method includes steps of designing parameters of a hole network and distributing holes; drilling holes by cutting drills; charging and blocking; and networking and detonating. The digital electronic detonators are used for precisely controlling blasting, the hole network is designed to be subjected to detonation in parallel and detonation layer by layer, powder charges on the same layer are detonated from two sides to the center obliquely hole by hole, and millisecond delay of powder charges on different layers is realized according to a sequence from bottom to top in the holes. The implementing scheme of adopting the electronic detonators to detonate during blasting of collapse rocks in complicated environments is determined. According to tests of blasting utilizing the electronic detonators to detonate, the technical method of utilizing the electronic detonators to realize precise delay detonation for improving blasting lumpiness is researched, a guarantee is provided for controlling collapse accumulation range of broken rock after blasting, shocks to surrounding rock are reduced greatly on safety blasting conditions of the collapse rock, and secondary disasters are avoided.

Description

technical field [0001] The invention belongs to the technical field of blasting, and in particular relates to a method for accurately controlling blasting by a digital electronic detonator of a tall and dangerous rock mass. Background technique [0002] Dangerous rock mass refers to the rock mass that has not collapsed yet, but has the main conditions for collapse, and has appeared the phenomenon of collapse precursor, indicating that collapse may occur in the near future. Dangerous rock mass is a potential collapse body, and the main basis for its identification is: large height difference, or the slope body is an isolated steep mouth, a concave steep slope with a huge empty face in front of the slope body; Incomplete, with a large number of fissures or weak zones extending in line with the slope inclination or parallel to the slope; the development of slumps at the foot of the slope indicates that collapse activities have occurred; there are tension fissures in the upper p...

AI Technical Summary

Problems solved by technology

However, due to the limitation of blasting materials, it is still difficult to achieve precise control of blasting engineering

Therefore, it is difficult to form a reliable and accurate blasting technology by using the traditional electronic detonator to control the blasting, so that the size of the rock after blasting cannot be effectively reduced, and secondary disasters are easily generated, and the blasting method mostly adopts deep hole one-time blasting. Large flying rocks will be generated, which poses a safety hazard

Images