Double-emission-center cutting deep hole blasting technology

A technology of radiation center and deep hole, applied in blasting and other directions, can solve the problems of high cost of blasting chamber, difficulty in cutting chamber construction, large amount of mining and cutting engineering, etc., to achieve strong popularization and application value, reduce cutting cost, and simplify cutting The effect of craftsmanship

Inactive Publication Date: 2014-02-26
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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Problems solved by technology

Due to the traditional cutting method requires the construction of cutting tunnels and cutting chambers, the amount of mining and cutting is large, the construction of cutting chambers is difficult, the working environment is harsh, the construction time is long, and the cost of chamber blastin

Method used

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  • Double-emission-center cutting deep hole blasting technology

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Embodiment Construction

[0016] Taking the seven ore belts in the Huashugou mining area of ​​Jingtieshan Mine as an example, the test work of cutting deep holes and cutting small wells combined with trenching was carried out in the I-II ore bodies and V ore bodies in the Huashugou mining area. The success rate of cutting small well blasting reached 100%, and the cutting cost reached the expected index. The parameters of deep hole cutting are based on the physical and mechanical properties of ore rock, blasting technology theory and the integration requirements of mining and cutting. The design parameters of deep hole cutting are: hole diameter: Φ76mm mm, hole depth: 6-17m, hole bottom distance: 1.8-2.0m, Two rows of deep holes are arranged in the cutting well with a row spacing of 1.5m. The design parameters for cutting the small well are: small well section: 1.0*2.0m 2 , the height of the small well is determined according to the upper level, and the left and right sides of the center of the roadway...

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Abstract

The invention discloses a double-emission-center cutting deep hole blasting technology. The double-emission-center cutting deep hole blasting technology comprises the following steps of arranging a cutting mine at an appropriate position of a cutting tunnel; confirming the long axis direction of the cutting mine and cutting a mine according to designed construction; designing and constructing middle deep holes which are formed in bilateral sides of the cutting mine with the utilization of double emission centers; confirming detonating ways of the cutting mine and performing on-line detonating. The double emission centers which are symmetrically arranged on bilateral sides of the center of the tunnel are 0.6 m far away from the tunnel center, the middle deep holes are formed with a left side emission center and a right side emission center serving as benchmarks, and 8 to 9 middle deep holes are uniformly formed according to the bottom distance of the holes. The hole diameter of the middle deep holes is 76 mm, the depth is from 6 to 17 m, the bottom distance is from 1.8 to 2.0 m, two rows of deep holes are formed inside the cutting mine, and the row interval is 1.5m. Successful application of the double-emission-center deep hole blasting technology has the advantages of cancelling cutting level tunnels, reducing cutting costs by a large margin, simplifying cutting technologies, providing technical guarantee for achieving a cutting mine and deep hole combined kerve and having strong popularization and application values.

Description

technical field [0001] The invention relates to mine blasting technology, in particular to a blasting technology for double-radiation center cutting deep holes. Background technique [0002] There are many ore belts in the mine, and the mining of each ore belt mostly adopts the non-pillar segmental caving method. Generally speaking, the mining structure parameter is a segmental height of 15m and an approach distance of 12m, while the cutting process of ore recovery adopts the traditional cutting tunnel Chamber or cutting deep hole combined with cutting chamber cutting method. Due to the traditional cutting method requires the construction of cutting tunnels and cutting chambers, the amount of mining and cutting is large, the construction of cutting chambers is difficult, the working environment is harsh, the construction time is long, and the cost of chamber blasting is high, and the damage caused by blasting is relatively large. Therefore, it is beneficial to improve labor...

Claims

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Application Information

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IPC IPC(8): F42D1/00
Inventor 程国华田宏海孙海军黄靖斌曹林君
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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