Open bench inter-hole differential control blasting method

A technology for controlling blasting and step holes, applied in blasting and other directions, can solve problems such as slope and surrounding environment hazards, limited interval time adjustment, limit the number of blasting rows, etc., achieve good crushing effect, increase the number of blast holes, and reduce mining cost effect

Active Publication Date: 2012-07-25
ZHUOLIWEI BEIJING TECH
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Problems solved by technology

[0006] The delay time of the high-precision nonel detonator is fixed, and the interval between the holes is very limited. Usually, multiple blastholes detonate at the same time, which not only leads to the increase of seismic waves, but also causes damage to the slope and the surrounding environment to a certain extent. , and the crushing e...

Method used

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  • Open bench inter-hole differential control blasting method
  • Open bench inter-hole differential control blasting method
  • Open bench inter-hole differential control blasting method

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Embodiment Construction

[0019] A method for blasting with differential control between open-air stepped holes according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0021] see figure 1 ,and figure 2 As shown, the method for blasting with differential control between open-air step holes in the embodiment of the present invention includes steps:

[0022] S10, drilling multiple rows of blastholes on the designed flat steps;

[0023] S11. Loading explosives into the blast hole, and loading the digital electronic detonator into the corresponding blast hole according to the set detonator num...

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Abstract

An embodiment of the invention discloses an open bench inter-hole differential control blasting method, which relates to the technical field of mining and is invented for solving the problems that resulting fragmentation degree needs to be better, blast vibration damage needs to be reduced, and large-scale blasting needs to be implemented effectively. The method includes: subjecting blast holes in a same row to inter-hole differential accumulation according to delay time of 1-5ms per hole-pitch meter, and performing inter-hole differential interval blasting; subjecting the blast holes in all rows to inter-hole differential accumulation according to the delay time of 10-30ms per row-spacing meter, and performing inter-row differential interval blasting; and filling at least one of the blast holes with a plurality of priming bombs or spaced charged explosive, and performing intra-hole differential interval blasting. The method is applicable to open-pit mining, and also applicable to large-scale earth-rock excavation engineering, large-scale hydropower engineering, large-scale civil engineering, large-scale underground workshop excavation and the like.

Description

technical field [0001] The invention relates to the technical field of mining engineering, in particular to a blasting method with differential control between open-pit step holes. Background technique [0002] Step blasting, also known as step blasting, refers to the blasting method in which drilling is carried out on pre-designed steps and loaded with columnar charges. It is the most widely used blasting method in modern blasting engineering. Large-scale excavations such as open-pit mining, railway and road cutting engineering, hydropower engineering, trench foundation pit excavation, and underground cavern excavation are inseparable from step blasting. [0003] Millisecond blasting, also known as millisecond blasting, is a method of using millisecond detonators or other millisecond delayed initiation devices to achieve sequential detonation of charges. Due to the extremely short time interval between the explosions of the front and rear adjacent charge packs, the energy ...

Claims

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Application Information

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IPC IPC(8): F42D3/00F42D1/00
Inventor 薛世忠杨年华王海亮
Owner ZHUOLIWEI BEIJING TECH
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