Deep hole uncoupled charge aqueous medium extruding and loosening blasting assembly and blasting method

Abstract

The invention relates to a coal (rock) body loosening blasting technology, in particular to a deep hole uncoupled charge aqueous medium extruding and loosening blasting assembly and a blasting method.The deep hole blasting method provided by the invention comprises the following steps of S1: drilling construction; S2, charging, comprising mounting a charging guider at an end part of one end of atube and fixing the same; mounting an explosive in the tube; placing a plurality of groups of initiators in a spaced manner along a long axis direction of the tube in the explosive, and placing a mother wire, and connecting a wire of each group of initiator to the mother wire; placing the tube charged with the explosive, together with the mother wire, in a drilled hole; and communicating a water injection pipe to a water injection cavity; S3, sealing an orifice of the drilled hole for reinforcement; S4, injecting water into the water injection cavity fully; and S5, connecting the mother wire to finish blasting. The assembly and method have the advantages that normal advancement the working face is less affected, so that the advancing speed and efficiency of the exploring working face are guaranteed; stope face equipment and facilities are not damaged easily, so that the equipment maintenance cost is lowered; and the blast rocks are small in lumpiness and uniform, so that the rocks arecut favorably by a coal cutter.

Description

technical field [0001] The invention relates to a coal (rock) body loosening blasting technology, in particular to a deep hole uncoupled charging water medium extrusion loosening blasting component and a blasting method. Background technique [0002] With the increase of coal mining depth, low-gas mineholes become high-gas mineholes, high-gas mineholes become coal and gas outburst mineholes, and the mining protection layer is the simplest, most effective and most economical way to prevent coal and gas outburst. regional measures. Since the first use of this measure in France in 1937, almost all countries where outbursts have occurred, as long as they have the conditions for mining protective layers, have adopted this measure. Therefore, Article 40 of the "Regulations on the Prevention and Control of Coal and Gas Outbursts" clearly requires that mining protection layers should be given priority in regional outburst prevention measures. However, most of the protective layers...

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Problems solved by technology

However, for the mining face of the protective layer, the method of relocating the working face cannot be adopted to deal with it.

[0005] In addition, comrades Wang Dingguo and Wang Tao published "Application of Deep Hole Loosening Control Hydraulic Blasting in Anti-scouring and Pressure Relief" in the 10th issue of "Energy and Environmental Protection" 2013, introducing the application of hydraulic blasting in the 21132 working face of Changcun Coal Mine. According to the exploration and test situation, this disclosed technology has the following deficiencies: 1) the hole depth, the aperture is small, the charge structure is complicated, and the charge is difficult; Ordinary clay (with a sand content of about 10%) is sealed by artificial filling, which has low sealing efficiency and poor effect; 3) low efficiency and not easy to popularize

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