Well type medium-length hole perforation segmented blasting method

Abstract

The invention discloses a well type medium-length hole perforation segmented blasting method. The method is characterized in that a plurality of inclined holes are formed outside a cutting area, the layout of the plurality of inclined holes is trapezoidal from the side section, and the inclined holes have the effects that firstly, in the same-section blasting process of the cutting area and explosive arranged at the tops in the inclined holes, a blasting compensation space at the bottom is increased, secondly, a space generated after blasting is umbrella-shaped, when other holes are blasted, besides the blasting compensation space is increased, a partition plate is arranged in a straight hole of a peripheral area, blasting force acts on the partition plate instead of a rock mass behind the partition plate by blasting explosives in the holes, the rock mass behind the partition plate is protected from being influenced, meanwhile, the engineering quality is improved, the blasting modeling is complete, the generated pumice stones are fewer and smaller, the effect on a safety protection net hung at the bottom is smaller, meanwhile, the blasting force is bounced back in part and returns to the position of a central area, and the blasting kneading effect and the like are exerted on a blasting body in the center again.

Description

technical field [0001] The invention relates to the technical field of blasting, in particular to a well-type medium-deep hole perforation segmental blasting method, in particular to a well-type medium-deep hole segmented perforation mode, charge structure and blasting method. Background technique [0002] It is known that my country's blasting technology was mainly developed after the founding of the People's Republic of China. In the early 1950s, blasting technology began to be widely used in road and railway construction. By the early 1960s, blasting technology had also been widely used and developed in mine construction and water conservancy construction. In the 1960s and 1970s, due to the combination of engineering practice and scientific research, my country's blasting technology has been steadily developed and improved. my country has carried out 1,000-ton to 10,000-ton mine blasting and 1,000-ton difficult directional blasting, and achieved relatively advanced econ...

AI Technical Summary

Problems solved by technology

[0004] During the entire blasting process, perforation is one of the important work links, especially for medium and deep holes. The one-piece rod is connected through the screw port. Therefore, due to the deviation of the screw port during the piercing process, the deeper the piercing, the greater the deviation. Most of the problems are upward piercing. The distance and the design error are relatively large, so after the blasting, the roof is often suspended and crowded, and the operators cannot move at the bottom, and there are great risk factors. The blasting method is particularly important

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