A method for measuring blasting displacement in open-pit mines
A measurement method and mine technology, applied in the field of mine blasting, can solve the problems of reducing the recovery rate of ore resources, damaging the economic benefits of mines, etc., and achieve the effect of avoiding damage
Inactive Publication Date: 2019-07-19
CENT SOUTH UNIV +1
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Problems solved by technology
For ores with low value or rich reserves, blasting displacement has little impact on mine economy, but for rare ores with high value and low reserves such as gold, silver, and uranium, the ore loss and dilution caused by blasting displacement not only reduce the ore Resource recovery rate, and seriously damaged the economic benefits of the mine
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[0038] The open-pit mine blasting area blasted in this embodiment is as follows: figure 1 As shown, the ore deposits in this open-pit mine are complex in shape and inconsistent in size. The ore blocks containing uranium ore are often surrounded by waste rocks such as gneiss and marble in the form of isolated islands. The naked eye is used to identify and divide the ore distribution area. The height of the blasting steps is 7.5m, the hole diameter is 165mm, the hole network parameters are 4.5*5.0m, the mixed explosives are used to load the emulsion explosives, the blasting network uses 75ms detonators between rows, and the detonator delay time between holes is 42ms.
[0039] The specific implementation steps are as follows:
[0040] Step 1: Determine the initial ore-rock boundary line 1 in the explosion area based on the resource model obtained from mine exploration and geological records. The area within the initial ore-rock boundary line 1 is the ore area of the explosion...
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The invention discloses a blasting displacement monitoring method for a surface mine. The blasting displacement monitoring method is characterized in that a glass bottle which is filled up with dyes or paint and is simultaneously filled with boosted inert gas is placed at a blast hole blocking section or in a bore hole at the periphery of a blast hole, wherein the glass bottle is crushed under action of blast pressure, and the inert gas is expanded at a pressure release moment, so that dyes are driven by the inert gas to color ore rocks around, and the colored ore rocks move along an instantaneous free surface along with a step main body; a high-precision GPS positioning system is utilized to obtain coordinate data of the bore hole before blasting and the colored ore rocks after blasting;and coordinates before blasting and coordinates after blasting are compared to perform blasting displacement measurement and ore rock boundary displacement determination. The method realizes monitoring and visualization of blasting displacement, accurately identifies ore rock area distribution after blasting, increases an ore rock resource recovery rate, improves economic benefits of the mine, andis of great theoretic and practical importance on exploitation of ore rocks of the surface mine.
Description
technical field [0001] The invention belongs to mine blasting technology, in particular to a method for measuring blasting displacement in an open-pit mine. Background technique [0002] At present, open-pit mines at home and abroad mainly adopt the method of step blasting for ore mining. For mines with complex ore deposits, many ores in the blasting area are surrounded by waste rocks in the form of islands. For this type of blast area, the ore and waste rock will move along the direction of the free surface during blasting. When the blasting displacement cannot be measured and predicted, mines often delineate the ore after blasting based on the ore position before blasting. Guide shoveling. For ores with low value or rich reserves, blasting displacement has little impact on mine economy, but for rare ores with high value and low reserves such as gold, silver, and uranium, the ore loss and dilution caused by blasting displacement not only reduce the ore Resource recovery r...
Claims
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IPC IPC(8): F42D1/00F42D1/08F42D3/04
CPCF42D1/00F42D1/08F42D3/04
Inventor 史秀志喻智董文明苗小虎蔡兴琦陈辉苟永刚陈新
Owner CENT SOUTH UNIV