Sill-free sublevel caving method with drift space greater than sublevel height

A technology of segmental caving and mining method, which is applied in ground mining, underground mining, special mining, etc., and can solve problems such as poor technical and economic indicators and low mine production efficiency

Inactive Publication Date: 2006-02-15
宝钢集团上海梅山有限公司
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Problems solved by technology

The traditional ore-drawing theory only studies the shape of a single discharge body in isolation. Constrained by the traditional ore-drawing theory and design specifications, for a long time, the design, research, and application of the pillarless segmental caving mining method in China have been stuck at a distance of no more than The state of segment height is generally L=(0.8~1.0)·H, refer to image 3 , that is, the value range of the traditional theory is 3, resulting in low mine production efficiency and poor technical and economic indicators

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  • Sill-free sublevel caving method with drift space greater than sublevel height
  • Sill-free sublevel caving method with drift space greater than sublevel height
  • Sill-free sublevel caving method with drift space greater than sublevel height

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Embodiment Construction

[0013] refer to figure 2 , 3 , the steps to determine the stope structural parameters of the pillarless segmental caving mining method with the approach distance greater than the segmental height are as follows: 1. According to the ore body occurrence conditions, mine production scale and other factors, select the appropriate segmental height H; 2. , after the subsection height is selected, according to the method for determining the subdivision height H of the approach distance L=(1.0~1.5), that is, the value range of the present invention is 4, and the approach distance L is determined. If the section height H=15 meters is taken, according to the determination method of the approach distance L=(1.0~1.5)·section height H, L=1.33×H can be taken, then L=1.33×15 meters=20 meters; Segment height H=12.5 meters, according to the determination method of approach distance L=(1.0~1.5)·segment height H, desirable L=1.2*H, then L=1.2*12.5 meters=15 meters. The specific implementation...

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Abstract

This invention relates to an underground mining technology, especially to a sectionalized avalanche mining method without bottom pole whose route space is more than the sectionalized height. The bodily technique method as follows: after choosing the sectionalized height, confirming the route space L according the following methods: the route space L is more the sectionalized height H, the route space L =(1.0-1.5).sectionalized height H. This invention is mainly applied in the underground mining, and this technique method can improve the control range of each route greatly, and save the mining quantity, and reduce the ratio of grubbing and plucking, and improve the mining efficiency.

Description

1. Technical field [0001] The invention relates to an underground mining technology, in particular to a pillarless segmental caving mining method in which the approach distance is greater than the segmental height. 2. Background technology [0002] Pillarless segmental caving mining method is a continuous mining method with approach as the production unit, top-down and retreat mining. The stope structure parameter is the main parameter of this mining method, which is composed of three-dimensional dimensions of section height H, approach distance L, and ore-breaking step distance B. Refer to figure 1 , the route 1 is arranged in a rhombus or approximately a rhombus in space 2 . This mining method has the advantages of good safety, high flexibility, high degree of mechanization, and convenient production organization. It is widely used in iron ore mining, and it also accounts for a large proportion in the mining fields of non-ferrous metals and chemical minerals. The traditi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16E21C41/22
Inventor 范庆霞金闯董振民
Owner 宝钢集团上海梅山有限公司
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