Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for determining caving step-distance in non-base column sectional ore-caving mining method

A technology of step-by-step and segmental caving, applied in the field of underground mining, to achieve the effect of large amount of ore collapsing, the method is simple and clear, and the indicators of mining loss and dilution are good.

Inactive Publication Date: 2009-12-09
宝钢集团上海梅山有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for determining caving step-distance in non-base column sectional ore-caving mining method
  • Method for determining caving step-distance in non-base column sectional ore-caving mining method
  • Method for determining caving step-distance in non-base column sectional ore-caving mining method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The invention has good effect when used in Meishan Iron Mine.

[0030] 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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method for determining the ore-collapse step distance in pillar-less sub-cave mining, in which the mining work is carried out with the ore block as the unit, the approach as the working face, and the ore-collapse step as the operation cycle, when the high segment structure is adopted In formal mining, the optimized parameter is Hf≈H, Hf—drawing height (m), and H represents the segment height; when mining with a large spacing structure, the optimized parameter is Hf≈2H; the optimized parameter of the ore collapse step is Select by the following method: R=-0.00071Hf2+0.185Hf-0.542 In the formula: R—ore collapse step distance (m); Hf—ore drawing height (m), H is segment height. The step distance of ore collapse determined by the invention matches well with the industrial discharge body, and the application in mine production has high production efficiency, good loss and dilution index, and low mining cost.

Description

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. Background technique [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 determined, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/00
Inventor 范庆霞金闯
Owner 宝钢集团上海梅山有限公司