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CN110410078A

The present invention is provided to the low dilution recovery methods in the mine of sublevel caving method without sill pillar, comprising: step 1 determines the height of lift H in stope structure；Step 2 determines fixation yield q when ore drawing: In formula, h is Ore Flows height (unit: m) and h=2H, e are natural constant, and a, b, c are parameter …

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Sublevel caving

Int. J, Rock Mech. Min. Sci. Vol. 3, pp. 129-153. Pergamon Press Ltd. 1966. Printed in Great Britain SUBLEVEL CAVING* I. JANELID and R. KvhPm Department of Mining and Mine Surveying, Royal Institute of Technology, Stockholm, Sweden (Received 1 November 1965) A~traet--The following article contains a summary of the results obtained by …

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CN110926285A

The application relates to the technical field of underground mining, and provides a method for reducing the lump size of ore in sublevel caving mining without sill pillar, which is used for iron ore mining; when charging, dividing at least one blast hole in the middle of each row of blast holes into a first blast hole group, charging the blast holes in the first …

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CN103557029B

The present invention relates to a kind of by sublevel caving method without sill pillar upwards to the method for horizontal cut and fill stoping transition.Its technical scheme is: in the stage below next-door neighbour's caved area (1) in mining area, be isolation strip (2) and back production district (3) by described divided stages, the top in described stage …

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What is the difference between the sublevel caving method without …

In order to solve the shortcomings of the bottom column of the sublevel caving method, the bottomless sublevel caving method has been popularized at home and abroad. The main feature is that the stage is divided into sections by segmented roadway, and the upper and lower sections are fed back.

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CN113465462A

The invention discloses a mining method for eliminating sublevel caving mining suspended roofs without bottom pillars, and relates to the technical field of underground ore mining. The method comprises the following steps: filling a first annular joint-cutting medicine package and a unidirectional energy-gathering joint-cutting …

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CN113465462B

The invention discloses a mining method for eliminating sublevel caving mining suspended roofs without bottom pillars, and relates to the technical field of underground ore mining. The method comprises the following steps: filling a first annular joint-cutting medicine package and a unidirectional energy-gathering joint-cutting medicine package …

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CN102419139A

The invention relates to a bottom-post-free sublevel caving method adopting a reinforced concrete structure artificial false roof, which comprises the following steps that: sublevel extraction is carried out under a coverage rock layer, an upper sublevel extraction roadway and a lower sublevel extraction roadway are in rhombic staggered arrangement, and …

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Caving Method, Classification and Application of the

The stratified caving method is seldom used now and gradually replaced …

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Ground pressure control example of sublevel caving mining method …

Ground pressure control example of sublevel caving mining method without bottom pillar August 26 05:01:22, 2024 Fushan iron ore mine four to contact metasomatic skarn magnetite bed, into nearly anything, about 1km, occurrence elevation of 911.4 ~ 666.5m, part of the exposed surface.

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CN107489420A

The present invention, which provides a kind of sublevel caving method without sill pillar Rock fragmentation distribution remote real time monitoring system and method, the system, includes web camera, DVR, image data transmission system, remote terminal processing platform；Realize in real time monitoring ore drawing during Rock …

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CN100535387C

This invention discloses a modified sublevel caving method without bottom column, it includes substoping, drilling in route, blasting and ore output. Its feature is that ore body is defined as induction inbreak area, normal winning area and bottom recovery area from top to bottom and working in turns. The goal of induction inbreak area blasting coal winning …

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CN110821494A

The invention discloses a method for controlling the transition of sublevel caving without sill pillar to low-dilution ore drawing, which comprises the following steps: (1) on the basis of structural parameters of the existing sill pillar-free sublevel caving method, the mining standard roadways are arranged in a staggered manner from top to bottom in an ore …

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Control method for low depletion ore drawing transition through bottom

The invention discloses a control method for low depletion ore drawing transition through a bottom-pillar-free sublevel caving method. The method includes the following steps that (1) based on structural parameters of an existing bottom-pillar-free sublevel caving method, accurate mining roadways are staggered and arranged up and down in an ore …

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sublevel caving method without sill pillar

sublevel caving method without sill pillar,： 。

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Sublevel in a sentence (esp. good sentence like quote, …

Sublevel caving without bottom pillar is the method of mining used at Huashugou Mine[Sentence dictionary], Jiuchun Iron and Steel Co. 7. In light of the characteristics of Nonpillar sublevel caving method, Probability integral method is used to predict mining subsidence and modified to improve predicting accuracy.

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Numerical Simulation of Independent Advance of Ore

Since the non-pillar sublevel caving method is detonated under a loose rock cap the capping detonation needs less explosive energy. ... Distance from bottom free surface (m) 10.5 2.36 1.5 12.8 2.56 1.8 13.5 2.62 2.2 13.0 2.61 2.5 13.21 2.63 3.0 Time of blast hole permeated entirely 15.8 16.5 14.8 17.5 19.4 Start stop time Action time of …

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(PDF) Longwall; Sublevel Caving and Block Caving

Longwall Longwall in coal Longwall in Hard Rock Sublevel Caving Characteristics of the ore body and mining method Development Production Equipments Used Block Caving Introduction Historical ...

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Caving Method

The stratified caving method is seldom used now and gradually replaced by the sublevel caving method, with or without a pillar. The characteristics of the non-pillar sublevel caving method are that it carries out medium and deep hole drilling and muck ore in the mining roadway without special bottom structure, so that the stope structure is ...

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Covered rock formation without pillar sublevel caving mining method

The sublevel caving method without bottom column requires that the covered rock layer be filled in time with the goaf. ... there is no sub-pillar sublevel caving method. There are two main methods for forming rock strata. First, concentrated topping, this method is based on the arrangement of the sub-column sublevel caving method, …

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CN108590652B

The invention discloses a kind of sublevel caving method without sill pillar that a nugget is divided along orebody trend, including dividing nugget along orebody trend, nugget is divided into stage and segmentation, road connecting taxiway and route are tunneled in nugget is respectively segmented, developing and system include return aircourse, …

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Improvement of sublevel caving without sill pillar

After the stope structure parameters, hole arrangement parameters, blasthole layout form, initiating mode and ore drawing mode of sublevel caving without sill pillar in Shenbu Copper Mine had been improved, ore loss and dilution ratio, unit consumption of explosive were reduced, production ability was increased, and good technico economical indexes …

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CN106246183B

The present invention relates to a kind of method for determining sublevel caving method without sill pillar avalanche volume morphing, according to draw theory and least energy consumption principle, show that Caved ore body is similar with Loose rock, its form lacks for ellipsoid, and three's eccentricity is identical, the mathematical modeling of Caved …

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Sublevel Caving Method with Sill Pillar | SpringerLink

Sublevel caving method with sill pillar is the mining process in which a level is divided into several sublevels, a bottom structure specifically used for ore removal is furnished at the lower part of each sublevel, and stoping of ore proceeds from the top sublevel to the bottom sublevel (Fig. 1).It is also called sublevel caving method with …

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CN108590652A

The invention discloses a kind of sublevel caving method without sill pillar dividing a nugget along orebody trend, including dividing nugget along orebody trend, nugget is divided into stage and segmentation, road connecting taxiway and route are tunneled in nugget is respectively segmented, developing and system include return aircourse, …

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Study on Optimization of Stope Structure Parameters for …

caving step by using the assembled three-dimensional draw - ing test method for the sublevel caving mining without pillar, and the total recovery rate of ore was increased by 11 per-centage points. Liu et al. [18] used numerical simulation to optimize the stope structure parameters of underground bro-

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CN111638090A

The invention relates to a medium-length hole sampling device and a method for bottom-pillar-free sublevel caving mining, wherein the medium-length hole sampling device comprises a funnel collecting device and a solid-liquid separating device arranged at the lower part of the funnel collecting device, and the method comprises the following steps: …

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CN103089266A

The invention relates to a drift-pillar-free sublevel barnyard caving mining method of an open pit transferred underground transitional period. The drift-pillar-free sublevel caving mining method comprises the following steps of: carrying out sublevel recovering; and finishing rock drilling, blasting and ore removing in a feeding path.

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Sublevel Caving Method Without Sill Pillar | SpringerLink

Advantages of sublevel caving method without sill pillar: the stope has a simple structure, which is beneficial for the operation of large mechanized trackless self-propelled equipment; no need to maintain pillars, high adaptability to changes of ore body, concentration and stoping of the orebodies of various grades and with horse stones, and …