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Arrangement method for double-empty-hole rhombic cutting holes in drift filling mining

A technology of approach filling and layout method, applied in earth-moving drilling, discharging machinery, blasting, etc., can solve the problems of high blasthole inclination angle, limitation of blasting footage, low blasthole utilization rate, etc., to achieve high blasthole utilization rate, blasting The effect of improving efficiency and reducing the cost of rock drilling and blasting

Inactive Publication Date: 2019-02-22
NORTHWEST RES INST OF MINING & METALLURGY INST
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Problems solved by technology

The layout of traditional blastholes is basically divided into two categories, straight hole cutting and oblique hole cutting, among which straight hole cutting is more widely used; among them, the advantage of oblique hole cutting is that it can effectively throw rocks within the cutting range out of the hole In addition, the number of blast holes required for the formed compensation space is small and the blast hole utilization rate is high, but at the same time the accuracy of the blast hole inclination angle is very high, and the footage of a single blast is limited; straight hole cutting is to cut all the blast holes to the same depth, and all The bottom of the blasthole is parallel, the depth of the blasthole is consistent with the depth of the excavation, the utilization rate of the blasthole is low, and the blasthole is prone to blasting pinching, which affects the blasting effect

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  • Arrangement method for double-empty-hole rhombic cutting holes in drift filling mining

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Embodiment Construction

[0016] In order to better understand the present invention, the method for arranging double hollow diamond-shaped cut holes of the present invention will be further described in detail below through a specific case in conjunction with the accompanying drawings.

[0017] 50 times of excavation and blasting tests were carried out in the layered roadway of the third middle section of Baiyin Xiaotieshan according to the above-mentioned cutting hole arrangement method, and the excavation and blasting tests were carried out in combination with production.

[0018] In the cut blasting design, the first charging hole 1 and the second charging hole 2 are 3.2m long, and the empty hole 3 is 0.2m deeper than the first charging hole 1 and the second charging hole 2, which is 3.4m. For various reasons, the blastholes often do not actually reach the above-mentioned depths. The Swedish-made H128 double-arm electric full-hydraulic rock drilling jumbo is used for rock drilling. The machine is d...

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Abstract

The invention discloses an arrangement method for double-empty-hole rhombic cutting holes in drift filling mining, and belongs to the technical field of mineral mining. The double-empty-hole rhombic cutting hole arrangement method is adopted, therefore, the blasthole utilization rate is high, and the blasting effect is good; a small quantity of explosives are contained in the bottoms of empty holes and are detonated in the end, therefore, residues formed by blasting in the cutting holes are cast out of the holes, good blasting compensation spaces are provided for subsequent auxiliary hole blasting, and the cyclical footage is increased; and in addition, the blasting efficiency is improved, the cyclical footage is increased, on one hand, the rock drilling blasting cost is reduced, on the other hand, the primary mineral caving amount is increased, the drift stoping circulation operation frequency is decreased, therefore, the drift stoping time is shortened, the production capacity of a downward drift filling mining method is improved, and the drift mining safety and stability are facilitated.

Description

technical field [0001] The invention relates to the technical field of mineral mining, in particular to a method for arranging double-hole diamond-shaped cut holes in route filling mining. Background technique [0002] During the excavation process of underground roadway, the arrangement of blastholes determines the quality of the blasting effect of roadway excavation. The layout of traditional blastholes is basically divided into two categories, straight hole cutting and oblique hole cutting, among which straight hole cutting is more widely used; among them, the advantage of oblique hole cutting is that it can effectively throw rocks within the cutting range out of the hole In addition, the number of blast holes required for the formed compensation space is small and the blast hole utilization rate is high, but at the same time the accuracy of the blast hole inclination angle is very high, and the footage of a single blast is limited; straight hole cutting is to cut all the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C37/14F42D1/00F42D3/04
CPCE21C37/14F42D1/00F42D3/04
Inventor 刘涛
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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