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Method for measuring size of caved body obtained through non-sill-pillar sublevel caving mining

A segmented caving and measurement method technology, which is applied in the direction of measuring devices, specific gravity measurement, and analyzing materials, can solve the problems of difficult to determine its volume and failure to measure the volume of caving bodies, so as to fully recover ore resources and reduce the workload of mining , The effect of optimizing the structural parameters

Active Publication Date: 2013-12-25
UNIV OF SCI & TECH LIAONING
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Problems solved by technology

Since the cascading body is surrounded by loose overburden rocks, it has always been a difficult problem to determine its volume. So far, there is no method to measure the volume of the cascading body.

Method used

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  • Method for measuring size of caved body obtained through non-sill-pillar sublevel caving mining
  • Method for measuring size of caved body obtained through non-sill-pillar sublevel caving mining
  • Method for measuring size of caved body obtained through non-sill-pillar sublevel caving mining

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Embodiment Construction

[0024] specific implementation

[0025] Below in conjunction with accompanying drawing, describe the present invention with embodiment.

[0026] Such as figure 1 , figure 2 As shown, an iron mine adopts the pillarless segmental caving mining working face, and the working face is distributed with ore body 1, overburden layer 2, mining roadway 3, blasted ore body 4, caving body 5, released ore 6 and electrodynamic Scrapers7. The structural parameters measured at the -33m level are: section height H is 18m, approach distance L is 20m, ore-breaking step distance B is 2.0m, roadway section width b is 5.0m, and height h is 4.4m. Electric scraper 7 bucket capacity is 2m 3 .

[0027] Calculate the volume of the blasted ore body as:

[0028] V 矿体 =B·(H·L-b·h)=2.0×(18×20-5.0×4.4)=676.0m 3

[0029] When going out ore, shovel the ore 6 that three full buckets are discharged with electric shovel machine 7, weigh the gross weight that discharges ore 6 with platform scale to be:

...

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Abstract

The invention provides a method for measuring the size of a caved body obtained through non-sill-pillar sublevel caving mining. The size of the caved body is determined according to the size of an ore body which is exploded and the one-time coefficient of volumetric expansion. The method comprises the steps of firstly, measuring the sublevel height, the access space, the ore caving pace, the width of the cross section of a tunnel and the height of the cross section of the tunnel respectively, and working out the size of the ore body which is exploded according to stope structure parameters; secondarily, conducting site measurement and laboratory measurement respectively, determining the volume weight of discharged ore scattered bodies and the volume weight of the ore body which is exploded, and working out the limit loose coefficient of the discharged ore scattered bodies; then, according to the ore drawing principle, conducting empirical value taking on the secondary loose coefficient of ore inside the caved body, and determining the primary loose coefficient of the caved body by combining the limit loose coefficient of the drawn ore scatter bodies; at last, determining the size of the caved body according to the primary loose coefficient and the size of the ore body which is exploded. The method has great significance in further study of caved body forms, structure parameter optimization, stope preparation workload reduction and full recovery of ore resources.

Description

technical field [0001] The invention relates to the mining field of sub-pillar-less sub-caving method in underground metal mines, in particular to a method for measuring the volume of caving bodies in sub-pillar-less mining mining. Background technique [0002] Pillarless segmented caving method is widely used in underground metal mines. It is characterized by mining under the cover of loose overburden rocks. The amount of iron ore mined by this method accounts for 80% of the total iron ore mined underground. %about. [0003] Caving body is the ore heap formed after blasting ore body blasting, and it is the object of ore drawing in the sub-level caving mining method without pillars, and its shape has a great influence on the loss and dilution of ore. The volume of caving bodies is an important parameter of the shape of caving bodies, and its size is related to blasting parameters, structural parameters, ore body properties, etc. It is an important parameter for evaluating b...

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Application Information

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IPC IPC(8): G01B21/00G01N9/02
Inventor 张国建孙明磊薛海军
Owner UNIV OF SCI & TECH LIAONING
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