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Bench blasting hole distribution method

A technology of step blasting and hole layout, applied in blasting and other directions, can solve problems such as the inability to accurately and scientifically reflect the safety factor of flying stones in the front row of holes

Pending Publication Date: 2021-01-01
四川中鼎爆破工程有限公司
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Problems solved by technology

[0005] However, the length of the minimum resistance line of the blast hole is often only a conceptual data, because the highest point of the charge is located at a deep position inside the rock formation, so it is difficult to obtain it by simple measurement (a tape measure is used for ordinary hole layout, and a total station is used for high-precision positioning hole layout) or GPS, RTK), or it is difficult to implement simply under normal operating conditions
At the same time, the distance between the eyebrows of all designs at this stage (that is, the distance between the front row of holes and the top line of the step) is estimated by experience, or is not designed, so that it cannot accurately and scientifically reflect the blasting unit of the front row of holes. Safety factor of consumption and flying rocks

Method used

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0024] It should be noted that, in the description of the present invention, the terms "horizontal", "vertical", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and It is not to indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, or operate in a particular orientation, and thus should not be construed as limiting the invention.

[0025] Such as figure 1 As shown, the embodiment of the present...

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Abstract

The invention discloses a bench blasting hole distribution method which comprises the following steps: determining a bench slope angle, a drilling dip angle and a blocking length of a front row of holes, and the length of a least resistance line of the front row of blast holes according to blasting design; and calculating the eyebrow distance according to the bench slope angle, the drilling dip angle and the blocking length of the front row of holes and the length of the least resistance line of the front row of blast holes. The invention provides the bench blasting hole distribution method for determining the positions of a front row of holes by calculating the distance between the front row of holes and a bench slope crest line.

Description

technical field [0001] The invention relates to the field of hole layout for blasting. More specifically, the present invention relates to a method for laying holes in step blasting. Background technique [0002] Step blasting, also known as step blasting, refers to the blasting method of stonework propelled in the form of steps. Step blasting is divided into deep hole step blasting and shallow hole step blasting according to the hole diameter and hole depth. How to implement the length of the minimum resistance line of the blast hole is a problem when laying holes. We know that during step blasting, the length of the minimum resistance line of the front row of blastholes and the length of the blockage of the blasthole are the key parameters for the shortest distance between the blasting charge and the two free surfaces, which will directly affect the blasting of the blasting slope and roof Quality also determines the intrinsic safety of blasting. Therefore, when carryin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/00F42D3/04
CPCF42D1/00F42D3/04
Inventor 梁元强黄帝朱怀树胡勇
Owner 四川中鼎爆破工程有限公司
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