Sandstone aggregate mine rock mass blasting mining method

A mining method and mining rock technology, applied in blasting, ground mining, earth square drilling and mining, etc., can solve problems such as large blindness, lack of basis, and high powder ore rate, so as to reduce overall cost, reduce blindness, and reduce fine ore rate effect

Pending Publication Date: 2022-02-08
HONGDA MINING IND +1
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Problems solved by technology

However, there is no basis for the design of blasting parameters in the existing sandstone aggregate mine rock mass blasting mining method. Most of the blasting parameters are randomly adjusted after

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  • Sandstone aggregate mine rock mass blasting mining method
  • Sandstone aggregate mine rock mass blasting mining method
  • Sandstone aggregate mine rock mass blasting mining method

Examples

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[0067] Example

[0068] In a large mining of aggregate rock quarries, the choice of rock hardness, rock type, the volume of the funnel blasting, blasting fragmentation index distribution, fracture spacing and other explosives consumption required the entire six indicators quarry rock dividing bulk region above 800kg, 100kg-block region of 800kg and 100kg or less small area. By blasting geological record block of FIG partition rock blasting crater test rendering the surface structure of rock quarries, as figure 1 . Rock each block area, as follows:

[0069] Bulk region: granite rock type, rock hardness value of f> 12, blasting crater volume 3 Blasting block distribution index 0.45kg / m 3 The main structure of surface cracks 130 ° ∠80 ° pitch 70-200cm, the main structure of the surface of 60 ° ∠60-80 ° fissure distance> 100cm.

[0070] In block area: diabase and granite rock type, rock hardness f is 6-12, blasting crater volume 0.03-0.10m 3 , Blast fragmentation distribution index...

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Abstract

The invention relates to blasting of mine rock mass, and particularly relates to a sandstone aggregate mine rock mass blasting mining method. The method comprises the following steps of partitioning according to a lumpiness requirement, and drawing a blasting lumpiness partition map of the rock mass; designing blasting parameters according to a lumpiness grading requirement required by a scheduling instruction of the production plan; performing hole distribution blasting mining operation on the lumpiness area; analyzing the lumpiness of the blast pile after blasting, and optimizing blasting parameters; and carrying out the next blasting mining operation according to the optimized blasting parameters. According to the method, the blasting lumpiness partition map is drawn, the rock mass is partitioned according to the lumpiness quality according to the six indexes, the method is more suitable for the reality of sandstone aggregate mine rock mass blasting mining, different rock mass areas can be selected for blasting operation according to the lumpiness proportion of a production plan, and the comprehensive cost of blasting operation can be reduced; in addition, blasting parameters are optimally designed, and a step blasting method of a non-uniform and non-coupling charging structure is adopted so that the comprehensive cost is further reduced, and the fine ore rate is greatly reduced.

Description

technical field [0001] The invention relates to the blasting technology of rock mass in mines, in particular to a mining rock mass blasting method for sandstone aggregate mines. Background technique [0002] The purpose of rock mass blasting in sandstone aggregate mines is to blast out stones with a qualified lump size as required, and the explosion energy of explosives will cause the rocks near the blast hole to be crushed, which cannot meet the lump size requirements, and the powder ore rate needs to be controlled. From an economic and technical point of view, in order to determine reasonable blasting technical parameters, material consumption quotas, control blasting fragmentation, and ensure the lowest comprehensive cost of drilling, blasting, installation, and transportation, the rock mass in the blasting area must be divided according to blasting fragmentation requirements. , that is, it is necessary to give a quantitative evaluation of the maximum block size and avera...

Claims

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Application Information

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IPC IPC(8): F42D1/00F42D1/08F42D3/04E21C41/30
CPCF42D1/00F42D1/08F42D3/04E21C41/30
Inventor 李萍丰刘成建张耿城
Owner HONGDA MINING IND
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