A Method for Determining the Morphology of Caving Body in Segmented Pillarless Caving Method

A sub-caving method and caving body technology, which is applied in earth-moving drilling, surface mining, underground mining, etc., can solve the problems of large loss and dilution, difficult to observe the shape, and no method to determine the shape, so as to achieve full recovery of resources, The effect of reducing ore loss and dilution rate and optimizing structural parameters

Active Publication Date: 2018-03-30
UNIV OF SCI & TECH LIAONING
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Problems solved by technology

However, in this mining method, the ore is dropped and extracted in the overlying rock, and the problem of large loss and dilution has not been well resolved.
However, since the caving body occurs in the overlying rock formation, its shape is difficult to observe, and there is no method to determine its shape

Method used

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  • A Method for Determining the Morphology of Caving Body in Segmented Pillarless Caving Method
  • A Method for Determining the Morphology of Caving Body in Segmented Pillarless Caving Method
  • A Method for Determining the Morphology of Caving Body in Segmented Pillarless Caving Method

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Embodiment Construction

[0051] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0052] like figure 1 As shown, it is a relational diagram among the releasing body, the collapsing body and the loose body of the present invention. like figure 2 Shown is a schematic diagram of the sub-column mining face without pillars in the present invention. A method for determining the shape of the caving body in the segmental caving method without bottom pillars described in the present invention is based on the fact that the emanating body 2, the caving body 1 and the loose body 3 are similar ellipsoids, and the eccentricity of the three is the same. The volume of body 1 and the triaxial length of body 1 are used to determine the height and vertical approach of body 1 (i.e. figure 1 The width of the middle recovery approach 5) direction and the thickness along the approach direction; the concrete steps are as follows:

[0053] The fir...

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Abstract

The invention relates to a method for determining the shape of a caving body by a sub-column caving method without a bottom column. According to the ore drawing theory and the principle of minimum energy consumption, it is concluded that the caving body is similar to the loose body, and its shape is ellipsoid missing, and the three are eccentric In the same way, the mathematical model of the caving body is established on this basis; the volume of the caving body is determined by the primary loosening coefficient and stope parameters, the calculation formula of the volume of the caving ellipsoid is derived through mathematical transformation, and the three-axis length of the caving body is determined in combination with the volume of the caving body. Finally, determine the height of the caving body, the thickness along the direction of the mining approach and the width in the vertical direction of the mining approach. The invention has great significance for further studying the shape of the caving body, optimizing the structural parameters, reducing the loss and dilution of the ore, and improving the economic benefit of the mine.

Description

technical field [0001] The invention relates to the technical field of sub-pillar caving method mining in underground metal mines, in particular to a method for determining the shape of a caving body in the sub-pillar non-pillar caving method. Background technique [0002] Pillarless segmented caving mining method is currently widely used in metal iron mines at home and abroad because of its high mining intensity and many advantages such as production safety. However, in this mining method, the ore is dropped and extracted in the overlying rock, and the problem of large loss and dilution has not been well resolved. [0003] Caving body is the pile of ore formed in the loose overburden rock layer after blasting ore body blasting. It is the object of ore drawing, and its shape has a great influence on the loss and dilution of ore. However, because the caving body occurs in the overlying rock formation, its shape is difficult to observe, and there is no method to determine its...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/16
CPCE21C41/16
Inventor 张国建李广辉
Owner UNIV OF SCI & TECH LIAONING
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