Controlled blasting technology for adjacent important buildings
A technology for controlling blasting and buildings, applied in blasting and other directions, can solve problems such as unfavorable safety production, difficult control of flight distance and flight direction, hidden dangers of buildings and equipment, etc., to improve blasting quality and avoid blasting projectiles. , the effect of convenient operation
Inactive Publication Date: 2021-08-20
BENXI IRON & STEEL (GRP) MINING CO LTD
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AI Technical Summary
Problems solved by technology
[0002] The blasting scatter is generally produced in the first row of slag cleaning in the blast area, and its flight distance and direction are difficult to control. It can radiate tens of meters or even hundreds of meters, which will cause safety hazards to buildings and equipment around the blast area. Hidden danger, not conducive to safe production
Method used
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Embodiment 1
[0027] Controlled blasting around the production dispatching room of Nanfen Open-pit Iron Mine;
[0028] Project overview: The northern part of the blasting area is slag cleaning, and the distance of 60m is the production dispatching room and stope power supply lines. It is required that the dispatching room and power supply lines shall not be damaged after blasting.
[0029] Cover the slag-clearing area on the north side of the slag-clearing blast area with 6m of rock and flatten it to form the rock covered in front of the slag-clearing blast area; it is used to block the forward throwing objects formed after the blasting of the first row of blast holes that moved forward after taking technical measures ;
[0030] A blast hole is arranged sequentially between the top line of the step slope and the bottom line of the step slope, and a packing section and a charging section are arranged in the blast hole, and the packing section is arranged above the charging section;
[0031]...
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The invention relates to a controlled blasting technology for adjacent important buildings. The controlled blasting technology comprises the following steps that rocks with the diameter of 2 cm-3cm are arranged in front of a slag removal blasting area in a covering manner, and bulldozing is conducted to form rocks covering the front of the slag removal blasting area; blast holes are sequentially formed between a step slope top line and a step slope bottom line, and each blast hole is internally divided into a filling section and a charging section; a first row of blast holes moving forwards after technical measures are adopted are formed between a step slope surface and the rocks covering the front of the slag removal blasting area, the first row of blast holes moving forwards after the technical measures are adopted move forwards relative to the step slope surface, and the explosive loading amount of the slag removal first row of blast holes is properly reduced; and therefore the flying distance of forward-rushing throwing objects is reduced after the first row of blast holes moving forwards after the technical measures are taken are blasted. A chassis resistance line is overcome, the occurrence of a root bottom is avoided, the blasting quality is improved, and the forward-rushing objects occurring in rear blast hole blasting are reduced, so that the protected buildings are protected.
Description
technical field [0001] The invention belongs to the field of building blasting control, and in particular relates to a technology for controlling blasting adjacent to important buildings and structures. Background technique [0002] The blasting scatter is generally produced in the first row of slag cleaning in the blast area, and its flight distance and direction are difficult to control. It can radiate tens of meters or even hundreds of meters, which will cause safety hazards to buildings and equipment around the blast area. Hidden dangers are not conducive to safe production. Contents of the invention [0003] Technical scheme of the present invention is as follows: [0004] A controlled blasting technology adjacent to important buildings and structures, including the top line of the step slope, the filling section, the charging section, the bottom line of the step slope, the step slope surface, the first row of blastholes moved forward after taking technical measures,...
Claims
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IPC IPC(8): F42D1/00F42D1/08F42D3/02
CPCF42D1/00F42D1/08F42D3/02
Inventor 高毓山鹿文娇
Owner BENXI IRON & STEEL (GRP) MINING CO LTD