Sublevel caving method without bottom pillar

Sublevel caving method without bottom pillar

Caving Mining Method Classification and Characteristics

4 Sublevel Caving Mining Method In this method there is no bottom structure for ore drawing Segmented rock drilling ore caving and ore drawing are carried out in the stoping roadway Sublevel caving method is mainly used in the mining of iron ore deposits most of which are newly built mines

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

Search metals mining static bottom hole pressure SPE

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DOC Sublevel Caving Oraee

Sublevel Caving In this method the stope is divided into sublevels fairly close to each other normally with 8 15m vertical interval between each two adjacent ones These sublevels are called sublevel drifts or production drifts Production is carried out from the sublevel drifts by means of long holes above the end of the production drifts

Sublevel Sublevel caving From QueensMineDesignWiki

View Sublevel from MINE 101 at University of Nevada Reno Sublevel caving From QueensMineDesignWiki Sublevel Caving is one of the most advanced mining methods This method is usually

Longwall caving mining method for thick coal Design and feasibility

Abstract This report presents the results of a study to develop a detailed mining method design based on longwall mining with sublevel caving The method is applicable to low dipping coal seams 20 feet or more thick such as are found in the western United States

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

sublevel caving method without sill pillar in Chinese

What is the meaning of sublevel caving method without sill pillar in Chinese and how to say sublevel caving method without sill pillar in Chinese sublevel caving method without sill pillar Chinese meaning sublevel caving method without sill pillar sublevel caving method without sill pillar sublevel caving method without sill pillar translation pronunciation

New board and pillar mining Technical Report ETDEWEB

Low productivity and low recovery could be solved by replacing the sublevel caving method with the new board and pillar mining method The parameters such as the dip of the seam thickness strength of the coal and working depth were taken into consideration for the application of the new mining method A system with slusher can suitably be

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

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

Analysis on Subsidence Law of Bedrock and Ultrathick Loose Hindawi

In 1305 working face the strike length is 1823 m and the dip length is m and the dip angle of coal seam is 4 18° average 13° The thickness of coal seam is m average m The inclined long wall fully mechanized top coal caving method is adopted and the roof is managed by all caving method

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

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

PDF Basic Requirements of Backfilling With Flotation Tailings in The Bor

The ore body Bor River of the Bor Copper Mines is planned to be exploited by the sublevel stopping method In order to ensure greater efficiency in the exploitation of the ore body it is proposed

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 There should be overburden higher than the sublevel above the stoping face

80 sublevel caving layout depends primarily on the

Sublevel caving is a method that a Is applicable to a tabular orebody with 3 meters height b Involves the formation of the in situ ore into a mechanically mobile state by drillingand blasting and subsequently recovered c Is applicable to low plunging vein type depositd Rely on the caving of the ore 84

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

sublevel caving method without sill pillar in Chinese

How to pronounce sublevel caving method without sill pillar TranslationMobile sublevel caving method in Chinese sublevel undercut caving method in Chinese sublevel undercut caving method in Chinese sublevel caving in Chinese pillar caving in Chinese

The Evolution of Sublevel Caving at Trojan Mine Bindura SlideShare

Sublevel caving SLC at Trojan was first introduced on 21/0 level in 1994 at a vertical depth of some 500 m below surface when the initial conventional method failed to provide competent static draw points that would last for 18 months or more the average life of a draw point Marano 1992

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

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

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

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

Underground mining method SlideShare

Sublevel caving method • Sublevel caving is a mass mining method based upon gravity flow of blasted ore and caved waste rock • Its major advantage is safety • There is relatively high dilution of ore by caved waste • Some ore is lost in passive zones between those of active flow 28 Typical sublevel caving layout 29

[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

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

Cost Control of Mining Personnel Based on Wireless Hindawi

Published 10 Jan 2024 Abstract The sublevel caving method without sill pillar is used to improve the cost of mining The analysis is performed according to unique geographical environment and the current mining technology of the mine The wireless communication network is used to budget and control the work cost of mining

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

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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