Coalmine rock roadway excavation shaped-charge water-pressure smooth blasting structure and method

Abstract

The invention relates to the field of shaped-charge water-pressure smooth blasting, in particular to a coalmine rock roadway excavation shaped-charge water-pressure smooth blasting structure and method. The coalmine rock roadway excavation shaped-charge water-pressure smooth blasting structure is characterized in that rock breaking holes are formed in the center line of a section of a rock roadway; cutting holes are symmetrically formed in two sides of the rock breaking holes; secondary cutting holes are formed in one side of the cutting holes; tertiary cutting holes are formed in one side ofthe secondary cutting holes; auxiliary holes are formed in one side of the tertiary cutting holes; peripheral holes are formed in the outer sides of the auxiliary holes; and bottom holes are formed inthe bottoms of the peripheral holes. The invention further provides the coalmine rock roadway excavation shaped-charge water-pressure smooth blasting method. Through the coalmine rock roadway excavation shaped-charge water-pressure smooth blasting structure and method provided by the invention, the big rock occurrence ratio can at least be obviously reduced; the coalmine rock roadway excavation speed can be improved by adoption of shaped-charge water-pressure blasting; and meanwhile, the explosive energy utilization ratio can be improved, the smooth blasting quality can be improved, and underground blasting dust can be efficiently reduced.

Description

technical field [0001] The invention relates to the field of energy-gathering hydraulic pressure smooth blasting in coal mines, in particular to a structure and method of energy-gathering hydraulic pressure smooth blasting for coal mine rock roadway excavation. Background technique [0002] The study of blasting theory, the application of controlled blasting technology and the development of blasting equipment have made great progress in our country. Compared with ordinary blasting, smooth blasting technology has obvious advantages. Many scholars have done a lot of work on improving the effect of rock roadway blasting. Particularity: If the blasting drilling surface is small, the use of equipment is more limited than tunnel blasting. If large rocks are produced in blasting, they need to be processed into small rocks before transportation, which will greatly affect the production progress. At the same time, there are also in coal mine blasting: The distance between periphera...

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Problems solved by technology

[0003] In order to solve the problems of the prior art, the present invention provides a structure and method of energy-gathering hydraulic pressure smooth surface blasting for coal mine rock roadway excavation with good blasting effect and low blasting large rock production rate. Improvements and innovations to solve the problem of large rock blocks in coal mine blasting

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