Open-pit bench blasting hole distributing method

A technology of step blasting and open-pit mines, which is applied in the direction of blasting, etc., can solve the problems that are not conducive to the standardized operation of drilling rigs and explosives mixed trucks, reduce the efficiency of drilling and charging operations, and the difficulty of implementing hole layout methods, so as to improve the drilling efficiency. Hole and charge efficiency, simple and fast hole layout, and the effect of improving the blasting effect

Inactive Publication Date: 2017-09-08
XIAN UNIV OF SCI & TECH
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Problems solved by technology

When the shape of the explosion area is very irregular, such as an ellipse, the above-mentioned hole layout method is difficult to implement, and it is easy to cause the blast hole con

Method used

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  • Open-pit bench blasting hole distributing method
  • Open-pit bench blasting hole distributing method
  • Open-pit bench blasting hole distributing method

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Embodiment Construction

[0033] Below in conjunction with the accompanying drawings, the present invention will be further described by taking the step blasting hole layout of a certain open-pit mine as an example.

[0034] a. Determine the rectangular area

[0035] A blast zone 1 in the open-pit mine figure 1 As shown, take the abscissa x of the minimum abscissa point 2 and the maximum abscissa point 3 in the explosion zone 1 2 =6.4,x 3 =69.9, the vertical coordinate y of the maximum point of vertical coordinate 4 and the minimum point of vertical coordinate of 5 4 =45.5,y 5 =6.7, with (x 2 ,y 4 ), (x 3 ,y 4 ), (x 3 ,y 5 ), (x 2 ,y 5 ) is the apex, and a rectangular area 6 is formed. The length of the rectangular area is 69.9-6.4=63.5m, and the width is 45.5-6.7=38.8m.

[0036] b. Layout holes in a rectangular area

[0037] b1 determines the direction of the hole layout

[0038] The method for judging whether the slope top line (7) or the rear boundary line (8) of the blast zone is stra...

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Abstract

The invention provides an open-pit bench blasting hole distributing method, and belongs to the technical field of strip mine exploitation. In the open-pit bench blasting hole distributing process, firstly, a rectangular region comprising a blasting area is determined according to the shape of the blasting area; secondly, holes are distributed in the rectangular region according to the distance between the holes, the distance between rows, resistance lines, the distance between the periphery holes and the like; thirdly, the blast holes located outside the blasting area are removed; and finally, the blast holes of which the resistance lines and the distance are small are moved, and the positions where the periphery hole distance or the resistance lines are large are additionally provided with blast holes. According to the open-pit bench blasting hole distributing method, the effect that the holes are easily and quickly distributed under the condition that the shape of the blasting area is irregular can be achieved, and the holes are distributed uniformly and regularly, so that the drilling and charging efficiency is improved, the blasting effect is improved, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of open-pit mining, and in particular relates to a method for arranging holes for step blasting in an open-pit mine. Background technique [0002] At present, there are mainly two methods of laying holes for step blasting in open-pit mines. One is to start from the side close to the top of the step and arrange holes from front to back; Arrange the holes row by row, and adjust the hole position of the front row or fill the holes. The former is suitable for the case where the shape of the explosion area is relatively regular, especially when the top line of the step is relatively straight; the latter is suitable for the case where the rear boundary line of the explosion area is a straight line perpendicular to the direction of step advancement. When the shape of the explosion area is very irregular, such as an ellipse, the above-mentioned hole layout method is difficult to implement, and it is easy to cause t...

Claims

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Application Information

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IPC IPC(8): F42D1/00F42D3/04
CPCF42D1/00F42D3/04
Inventor 肖双双马力
Owner XIAN UNIV OF SCI & TECH
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