Method for partitioning gravel aggregate mine rock mass according to lumpiness requirement
A technology of rock mass and sand and gravel, which is applied in the blasting field of mine rock mass to achieve the effect of reducing overall cost and meeting the requirements of blasting design and construction
Pending Publication Date: 2022-01-14
HONGDA MINING IND +1
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Problems solved by technology
At present, it is generally classified according to the difficulty of blasting or partitioned according to the size of the block. These methods are not close to the actual rock mass blasting mining of sandstone aggregate mines.
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[0025] In a rock mass quarry of a large-scale sandstone aggregate mine, six indicators including rock hardness, rock type, blasting funnel volume, blasting fragmentation distribution index, crack distance, and explosive unit consumption were used to dismantle the entire quarry rock mass according to requirements. Divide the large area above 800kg, the medium area of 100kg-800kg and the small area below 100kg. And through the geological record of the rock mass structural plane of the quarry and the blasting funnel test, the blasting fragmentation zoning map of the rock mass is drawn. The details of the rock masses in each block are as follows:
[0026] Large area: rock type is granite, rock hardness f value>12, blasting funnel volume3 , Blasting lumpiness distribution index0.45kg / m 3 , The crack spacing of the main structural plane 130°∠80° is 70-200cm, and the crack spacing of the main structural plane 60°∠60-80°>100cm.
[0027] Middle block area: the rock types are granit...
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The invention relates to a blasting technology of mine rock mass, in particular to a method for partitioning gravel aggregate mine rock mass according to lumpiness requirements. The method comprises the following steps of selecting rock hardness, rock type, blasting funnel volume, blasting lumpiness distribution index, fracture spacing and explosive unit consumption index for the gravel aggregate mine rock mass; dividing a whole blasting area of the rock mass into a large block area, a middle block area and a small block area by mass according to the indexes; and according to the division standards of the large block area, the middle block area and the small block area, a blasting lumpiness partition map of the rock mass is drawn through geological logging and a blasting funnel test. According to the method, the blasting lumpiness partition map is drawn, the rock mass is partitioned according to the six indexes and the lumpiness quality, 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, the field blasting design and construction requirements are met, and the comprehensive cost of blasting operation is reduced.
Description
technical field [0001] The invention relates to the blasting technology of mine rock mass, in particular to a method for partitioning sand and gravel aggregate mine rock mass according to the block size requirement. Background technique [0002] The purpose of rock mass blasting in sand and gravel aggregate mines is to blast out stones with a qualified block size as required. When designing blasting, in order to determine reasonable blasting technical parameters, material consumption quotas, and control blasting block sizes, ensure that drilling, blasting, and The comprehensive cost of loading and transportation is the lowest, and the rock mass in the blasting area must be divided according to the blasting block size requirements, that is, a quantitative evaluation must be given to the maximum block size and average block size after blasting in the area, and to determine which block size In which section of rock mass is the rock mass the comprehensive cost of blasting operat...
Claims
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IPC IPC(8): F42D1/00F42D3/04
CPCF42D1/00F42D3/04
Inventor 李萍丰杨鑫壁张耿城
Owner HONGDA MINING IND