Method for smooth blasting construction with pre-eccentric uncoupling charging

Abstract

The invention discloses a method for smooth blasting construction, and in particular relates to a method for smooth blasting construction with pre-eccentric uncoupling charging. The invention aims to provide the method for the smooth blasting construction with pre-eccentric uncoupling charging, which can improve the side slope smooth blasting effect. The technical proposal comprises that the method for the smooth blasting construction with pre-eccentric uncoupling charging comprises the following steps: (1) drilling a hole according to design requirement, cleaning up sundries in the hole and beside the hole after drilling the hole to prevent the blasting hole from being blocked by the sundries; (2) processing an ammunition string: processing the ammunition string outside the hole according to the design, wherein the size ratio of the diameter of the charging hole to the diameter of the ammunition string or the uncoupling coefficient is between 3.0 and 4.0; (3) mounting well-processed brackets on the ammunition string at intervals according to construction requirements; (4) putting the ammunition string into the blasting hole slowly by pressing close to the upper hole wall, namely one side of a light blasting body and blocking the blasting hole; and (5) initiating the blasting. The method is mainly applicable for engineering blasting.

Description

technical field [0001] The invention relates to a smooth blasting construction method, in particular to a smooth blasting construction method with front eccentricity and uncoupled charges. Background technique [0002] Traditional smooth blasting generally adopts interval charging, and uses bamboo slices to bind the charge strings at intervals. This charge package structure has uneven charge, resulting in serious local damage in the hole. On the other hand, according to the wave theory, during the propagation of the stress wave, due to the continuous expansion of the geometric volume, the stress pulse decays exponentially. The degree of rock damage in the area is the largest. As the distance between the charge and the hole wall increases, the peak pressure of the stress wave in the surrounding rock also decreases. This is the main feature of the stress field of the upper eccentric uncoupled charging method. The degree of damage is also reduced due to the reduction in peak p...

AI Technical Summary

Problems solved by technology

In smooth surface blasting, the tangent between the charge and the slope should be avoided as far as possible, and in smooth blasting, the tangent between the charge and the slope should be avoided as much as possible, while the traditional uncoupled charging method is that the charge is cut on the surface or Placed in the middle of the hole, it is not conducive to high-quality side slope formation