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Caving step-distance determination by non-base column sectional ore-caving mining method

A technology of caving step distance and subsection caving, which is applied in the field of underground mining to achieve the effect of good mining loss dilution index, high production efficiency and low mining cost

Inactive Publication Date: 2006-08-16
宝钢集团上海梅山有限公司
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Problems solved by technology

Currently there is no direct method to determine the step distance of the mine collapse

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  • Caving step-distance determination by non-base column sectional ore-caving mining method

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Embodiment Construction

[0024] The invention has good effect when used in Meishan Iron Mine.

[0025] Meishan Iron Mine is the first large-scale ferrous metal mine in China to adopt the pillarless sub-level caving mining method, with a designed annual mining and dressing comprehensive production capacity of 4 million tons. The mine adopts the optimization of the mining parameters of the non-pillar segmental caving method. The first phase adopts the stope structural parameters of 10-12m×10m, and the step distance of the ore collapse is 1.6-1.8m. The second phase adopts the structural parameters of the 15m×15m stope. The step distance is 2.0-2.2m, which was optimized to 3.2m after research. During the research period of the Tenth Five-Year National Science and Technology Research Program, the stope structure parameters of 15m×20m were used, and the ore-breaking step distance was 3.2m. With the continuous optimization of the structural parameters of the mine stope and the step distance of the ore collap...

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Abstract

A method of confirm stepping in non- base-column collapse mine, which is circulative mine, in take ore block as the unit, take the passage as the working face, take collapse mine stepping as assignment, when uses high-subsection structural style mining, the optimized parameter is that Hf is approximately equal to H, Hf- height of mining, H expresses height of subsection; when uses big spacing structural style mining, the optimized parameter is that Hf is approximately equal to 2H; getting subsection parameter of collapse mine stepping is by the following method: R=-0.00071 Hf2+0.185 Hf-0.542, R- collapses mine stepping (meter), Hf- height of mining, H expresses height of subsection.

Description

1. Technical field [0001] The invention belongs to the technical field of underground mining, and relates to a method for mining optimization of the pillarless segmental caving method, in particular to a method for determining the stope structural parameter of the pillarless segmental caving mining method——a method for determining the mining step distance. 2. Background technology [0002] Pillarless segmental caving method is a standard, flexible and efficient mining method, which is widely used in ferrous metallurgical underground mines, and also occupies a large proportion in non-ferrous mines, chemical mines and other fields. It takes the ore block as the unit, the access road as the working face, and the mining step as the operation cycle to carry out mining work. [0003] The subsection height, approach distance, and ore-caving step are the main parameters of the sub-level caving mining method without pillars. After the subsection height and approach distance are deter...

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Application Information

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IPC IPC(8): E21C41/00
Inventor 范庆霞金闯
Owner 宝钢集团上海梅山有限公司