Deep hole blasting charging method for passing through solution cavity and solution cavity detecting device

Abstract

The invention discloses a deep hole blasting charging method for passing through a solution cavity and a solution cavity detecting device. A deep hole comprises an upper blast hole section and a lowerblast hole section. A middle solution cavity exists between the upper blast hole section and the lower blast hole section, and the position and depth of the middle solution cavity are obtained through detection. In the upper blast hole section, a hole opening blocking section, upper section explosives and a solution cavity upper section blocking section are sequentially arranged from a hole opening to the hole bottom. In the lower blast hole section, the lower half section is filled with lower section explosives, and the upper half section is the solution lower section blocking section and blocks a hole opening of the lower blast hole section. A detonating cord communicates between the upper section explosives and the lower section explosives. According to the deep hole blasting chargingmethod, the blocking structure close to the middle solution cavity is utilized for carrying out delaying explosion to cause gas expansion, gas is extruded into the solution cavity to fill the solutioncavity after the upper section explosives and the lower section explosives are exploded, explosive energy leakage is effectively avoided, and the rock breakage effect is improved; and the remarkableadvantages of being convenient to construct, environment-friendly, efficient and economical are achieved.

Description

technical field [0001] The invention belongs to the technical field of engineering blasting, and more specifically relates to a charging method for deep hole blasting through a dissolved cavity and a detection device for a dissolved cavity, which are applied to rock mass blasting construction in a karst area. Background technique [0002] Karst refers to soluble rocks, especially carbonic acid rocks, such as limestone and gypsum, which are formed by the dissolution of flowing water containing carbon dioxide, and often have peculiar shapes, such as caves, stone ditches, stone forest caves, underground rivers, etc. . During the blasting operation of karst development, it is often encountered that the blast hole passes through the cave. The conventional charging method is difficult to ensure the continuity and uniformity of the blast hole charge in the lower section of the cave, resulting in a large number of roots and explosives after the blast. The energy is difficult to be ...

AI Technical Summary

Problems solved by technology

This method can improve the blasting effect to a certain extent, but the charging process is complicated, and it is very difficult to charge the PVC pipe; at the same time, in order to avoid the gap between the explosives and cause the explosion rejection, it is necessary to arrange multiple priming charges, and the existence of caves The volume of the explosive gas will expand rapidly, resulting in a significant reduction in its pressure; obviously, the use of PVC pipes in the prior art has not effectively solved related problems

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