Locatable bilinear cumulative blasting device in smooth blasting hole and blasting method

Abstract

The invention provides a locatable bilinear cumulative blasting device in a smooth blasting hole and a blasting method. A push rod device can be arranged for pushing a bilinear cumulative explosive tube into the smooth blasting hole; the bilinear cumulative explosive tube can be rotationally regulated to make sure that the center line of a bilinear cumulative groove is overlapped with the center line of the smooth blasting hole and the outline of a tunnel; energy generated by explosion of explosives is intensively released along the outline direction of the tunnel, and a smooth and regular tunnel outline surface can be formed after explosion. The device and the method disclosed by the invention have the advantages of improving the structure of a center positioning device in the smooth blasting hole, reducing the contact area between the center positioning device and the smooth blasting hole, reducing the resistance generated by pushing the bilinear cumulative blasting device into the smooth blasting hole, realizing smooth hole mounting operation of the cumulative blasting device, satisfying the production and design requirements, also reducing damages caused to the surrounding rocks by explosion of the explosives, and lowering the support and protection costs of rock tunnels.

Description

technical field [0001] The present invention relates to the technical field of controlled blasting, and can be specifically described as an energy-concentrating blasting device and a method for using it in relation to roadway profile shaping and surrounding rock protection in the process of smooth surface controlled blasting in coal mines, that is, a double-line blasting device that can be positioned in a light blasting hole. The utility model relates to a sexual energy-gathering blasting device and a blasting method. Background technique [0002] Smooth surface blasting refers to a controlled blasting technology that through the correct selection of blasting parameters and reasonable construction methods, segmental differential blasting, the outline of the roadway after blasting meets the design requirements, and the air surface is smooth and regular. [0003] The traditional smooth blasting construction method usually arranges a circle of densely drilled holes on the conto...

AI Technical Summary

Problems solved by technology

But due to the limitation of structure in this invention, above-mentioned technical means is infeasible in actual construction

[0005]First of all, in the actual construction, the inside of the blast hole is not smooth and flat, and there will be broken rocks or hole collapse in the hole. Due to the structural characteristics of the centering round table , so that the structure has a large resistance, it is difficult to advance in the blasthole, and even cannot be installed in the blasthole; secondly, although the device is provided with a centering ring in the hole and an orifice centering ring, in actual construction , if the centerline of the double energy-collecting grooves is to form a surface in the hole and between the holes that coincides with the center of the pre-splitting or smooth blasting face to be constructed, the device needs to be adjusted, but its structure is not convenient to adjust ; Again, the centering ring in the hole is provided with a split structure, which increases the difficulty of its process and increases its cost

Images