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Sublever caving mining model in large subsection without sill pillar

A technology of sub-caving and no bottom column, applied in the direction of analyzing materials, measuring devices, instruments, etc., can solve the problems of poor technical and economic indicators, low mine production efficiency, etc., and achieve the effects of high accuracy and simple technical solutions

Inactive Publication Date: 2006-04-19
宝钢集团上海梅山有限公司
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Problems solved by technology

For a long time, restricted by the traditional ore-drawing theory, the model and structural parameters of the sub-pillar caving mining method can only be determined by production experience and engineering analogy. The structural parameters of the sub-pillar caving mining method are in the design specification , in production, the determination method of stope structure parameters with section height H not less than approach distance L, generally H=1.0-1.2L, leads to low mine production efficiency and poor technical and economic indicators

Method used

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  • Sublever caving mining model in large subsection without sill pillar

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Embodiment Construction

[0015] Referring to the accompanying drawings, a high-segmented bottom-pillar-free segmented caving mining model, with four spatially tangent discharge bodies 1 as a single body, the specific steps of the stope structure parameters are as follows: 1. According to the ore body storage conditions, mine Depending on factors such as production technology and economic level, select the appropriate section height H; 2. After the section height H is selected, press the ore drawing height H f Approximately equal to the determination method of the section height H, determine the ore drawing height H f ; 3. Drawing height H f After confirmation, according to the relation [2] C=0.000819H f 2 -0.025H f +2.578 Determination method, determine the ratio C of the semi-major axis a of the emanating body and the semi-minor axis b of the emanating body; 4. After C is determined, press the relational formula [1] H = ( 3 ...

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Abstract

Comparing with prior method for determining structure parameters based on transitional theory, the invention builds mathematic model to calculate parameters accurately so as to overcome disadvantages of determining parameters based on operating experience and engineering analogy. Thus, production efficiency and technical economical index of mine is raised. The technical scheme is as following: after height of subsection is selected in mining model in large subsection without sill pillar, drawing off height Hf is determined. C is determined based on relational expression Cú¢0.000819Hf2-0.025Hf+2.578. Then, entrance span L is determined based on Hú¢(3 / 2)í‡Cí‡L. Advantages are: simple technical scheme, high accuracy for parameters, better technical economical index. The invention is suitable to exploitation for underground mine.

Description

1. Technical field [0001] The invention relates to an underground mining technology, in particular to a high-section, bottom-pillar-free, subsection caving mining model. 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 nonferrous metals, chemical industry and other fields. For a long time, restricted by the traditional ore-drawing theory, the model and structural parameters of the sub-pillar caving mining method can only be determined by production experience and engineering analogy. The structural parameters of the sub-pillar caving mining method are in the design specification , production are adopted: the section height H is not less than the method of determining the stope structure parameters of the approach distance L, generally H = 1.0 ~ 1.2L, resulting in low mine production efficiency, poor ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
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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