Sublevel caving method without bottom pillar

Sublevel caving mining method Epiroc YouTube

Sublevel caving is a large scale mining method suitable for large ore bodies with a steep dip and a rock mass where the host rock in the hanging wall will

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sublevel caving Britannica

sublevel caving Learn about this topic in these articles method of underground mining In mining Sublevel caving This method owes the first part of its name to the fact that work is carried out on many intermediate levels that is sublevels between the main levels The second half of the name derives from the caving of the hanging wall and…

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Caving Method Classification and Application of the

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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Sublevel caving ScienceDirect

Diagrammatic plan of sublevel caving in Kiruna l drifting 2 ring drilling roof of slice 3 charging of explosive 4 ore loading so called Tunnler 200 Fig 2 with from 1 to 3 drills on a chain feed cradle and in larger headings drill rigs with hydraulically operated feed cradles may be used

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Sublevel Caving

Sublevel caving has created through its possibilities of standardizing and mechanizing operations and equipment Other advantages are that the method can be adapted to orebodies of different shape size strength etc and especially that working conditions can be made safe and relatively comfortable since all work is carried out in drifts

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Raise Caving—A Hybrid Mining Method Addressing Current SpringerLink

Depending on the ore body thickness room and pillar methods or sublevel stoping methods are applied for ore extraction [ 29 30 ] Principally raise caving is based on the application of de stressing slots massive pillars and extraction in de stressed ground

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Method Sublevel Caving PDF Mining Rock Geology Scribd

Method Design It consists in dividing the mineralized body into vertically spiced sub levels between 10 and 20 m In each sublevel a network of parallel galleries that cross transversely the body at distances of the order of 10 to 15 m The galleries of a certain sub level are located in between and equidistant

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sublevel caving method without sill pillar sound sublevel caving

sublevel caving hydraulic support pronunciation sublevel caving method with sill pillar pronunciation sublevel caving mining pronunciation sublevel cut and fill pronunciation sublevel entry pronunciation sublevel long hole benching pronunciation

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Sme Mining Engineering Handbook Free pdf

such underground mining topics as sampling planning reserve analysis cost calculations various methods of support block and panel caving and sublevel caving make up this comprehensive text Numerous tables and figures enhance the extensive material found in each chapter An excellent teaching tool and

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Structural Parameter Optimization for Large Spacing Sublevel Caving in

Sublevel caving without a sill pillar was adopted for the mining stage −500 −570 m in Chengchao Iron Mine The ore body was about 1500 m long and 296° in the overall strike the direction of dip was 214° the amount of inclination was 0° 45° and the average thickness was m The ore body mainly comprised marble with good stability

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PDF Underground Mining Methods MineralsEd

Sublevel Caving Sublevel caving is usually carried out when mining of the orebody through an open pit method is no longer economically feasible Mining now proceeds underground underneath the open pit At first both a raise and a network of tunnels are made At different sublevels jumbos are used for long hole drilling

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02 Metode Tambang Bawah Tanah PDF Mining Minerals

Each sublevel features a system atic layout with parallel drifts along or across the ore body In a wide ore body the sublevel drifts start from the footwall drift and are driven until they reach the hanging wall This is referred to as transverse sublevel caving Figure In ore bodies of lesser width longitudinal sublevel caving is used

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Stoping Mining Methods Metallurgist Mineral Processing Engineer

Mining by Sublevel Caving In sublevel caving relatively thin blocks of ore are caused to cave by successively undermining small panels The ore body is developed by a series of sublevels usually spaced at vertical intervals of 18 to 25 or 30 feet more recently intervals of 50 feet or more have been used

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sublevel caving Britannica

method of underground mining In mining Sublevel caving This method owes the first part of its name to the fact that work is carried out on many intermediate levels that is sublevels between the main levels The second half of the name derives from the caving of the hanging wall and… Read More

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CN101338674A Non pillar sublevel caving mining method for direct

the non pillar sublevel caving method which loads and transports ores directly is characterized by comprising the steps as follows two or more dipheads are tunneled downwards at

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Search metals mining static bottom hole pressure SPE

Toggle navigation powered by i 2 k Connect 2 k Connect

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Research on sublevel open stoping recovery processes of inclined PLOS

When the orebody is more than 10m in vertical thickness [ 9 11 ] the sublevel caving method is most often used This method also requires an auxiliary recovery structure to recover ore remnants from the footwall and bottom floor as can be seen at the most mines in China and the Chambishi Copper Mine in Zambia

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sublevel caving Latest Research Papers ScienceGate

The main mining method used is sublevel caving In some areas due to the complex shape of the ore bodies the open stoping mining method is used which requires determining stable parameters of stopes and pillars It is necessary to study the stress strain state of the deposit to ensure safe mining conditions

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Sublevel Caving Technique PDF Mining Drilling Rig Scribd

As discussed in sublevel caving the hanging wall is allowed to cave in as the ore is drilled blasted and removed The wall caving is induced by mining the ore in controlled sequence usually from hanging wall to footwall and from top to bottom Sublevel caving is often used in conjunction with surface mining

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Stope sequencing QueensMineDesignWiki

The stope sequencing is one of the most important tools for controlling the behaviour of the rock mass in an orebody undergoing extraction In order to determine an appropriate extraction sequence an iterative approach must be taken Once the prospective location of the pillars is established the preliminary layout design for the set of

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mining Blasthole stoping Britannica

Blasthole stoping When the dip of a deposit is steep greater than about 55° ore and waste strong ore boundaries regular and the deposit relatively thick a system called blasthole stoping is used A drift is driven along the bottom of the ore body and this is eventually enlarged into the shape of a the end of the trough a raise is driven to the drilling level above

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Caving Underground Mining Methods longwall Sublevel caving Bloc…

Sublevel mining methods Geology Department Faculty of Science Tanta University Longwall mining Multisling mining Horizontal slicing NIT ROURKELA IndrajeetKumar110 Machineries and Maintenance Question Patterns for Mining students Jessore University of Science Technology Tunneling Drilling Equipments Rajarshi Patty

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[PDF] Longwall Sublevel Caving and Block Caving ResearchGate

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

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Investigation of Mining Induced Fault Reactivation SpringerLink

The height between levels is 70 m based on the design requirements of the non pillar sublevel caving method used in this mine The interval between sublevels is 14 m and the spacing between cross cut drifts is 16 m The southern orebody is mined along lines perpendicular to the strike of the orebody and progresses from north to south

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SUBLEVEL CAVING METHOD Stoping Method with Caving Metal YouTube

Sublevel Caving Method Metal Mining Stoping Method with Caving 👉𝙎𝙐𝘽𝙎𝘾𝙍𝙄𝘽𝙀 𝙉𝙊𝙒👈 ️Welcome to Mining Point 🔗Link🔗👇

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Structural Parameter Optimization for Large Spacing Sublevel Caving in

The findings of this study can further the goal of green and efficient mining and provide a theoretical reference for the popularization and application of pillarless sublevel caving

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Study on Size Optimization of a Protective Coal Pillar under a Double

Because of the problem that the size of a coal pillar is difficult to determine and it is easy to waste coal resources taking the Sangou Xindu coal industry as the engineering background this paper examined the roof cutting and pressure relief technology of small coal pillar gob side entry driving by means of theoretical analysis laboratory experiments and numerical simulation Through

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Sublevel Caving without Sill Pillar Xinhai

Sublevel Caving without Sill Pillar Vertically there are 3 5 sublevels in the stope room with each measuring 12 15m in height Medium and deep hole drill is adopted to drill upward fan shaped holes in the drilling roadway Stoping Method Production Capacity t/d Loss Rate % Dilution Rate % Sublevel caving without sill pillar 60

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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 mining 1 to 2

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Definition of sublevel stoping

A mining method involving overhand underhand and shrinkage stoping Its characteristic feature is the use of sublevels The sublevels are worked simultaneously the lowest on a given block being farthest advanced and the subs above following one another at short intervals The uppermost sublevel underneath the cover is partly caved

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