mid-deep hole pillarless sublevel caving mining method

Research on sublevel open stoping recovery processes of

·The gently inclined medium thick orebody is generally viewed as difficult to extract This paper presents a sublevel open stoping using long hole with back filling method particularly for inclined medium thick orebodies This method not only changes the temporal sequence of ore stoping and realizes transportation using gravity and trackless devices but

A new mine planning tool for sublevel caving mines

The SLC mining method is a mass mining method in which all material to be mined needs to be blasted In this sense it differs from the block cave mining method which relies on gravity and stresses to fragment most of the rock to be mined Because of the need to blast the rock the orebody has to be divided into a regular network of tunnels

Sublevel mining methods PPT

·Drawpoints are basic elements of development methods used in sublevel stoping sublevel caving block caving shrinkage VCR and others Can be positioned in sublevels production when using sublevel caving ; na base level or ore body when it is used block caving sublevel stoping and VCR Prof Dr Harraz Presentation sublevel stoping 31

Lost ore mining A supplementary mining method to sublevel caving

·Sublevel caving SLC is a mass mining method having high productivity and high safety However this method often causes a considerable amount of permanent ore loss holes 1 14 16; 6

Raise caving a new cave mining method for mining at

·Block and sublevel caving progress to greater depths associated with increasing rock mechanical and operational issues In order to address these issues a new cave mining method called raise

Research on sublevel open stoping recovery processes of

·The gently inclined medium thick orebody is generally viewed as difficult to extract This paper presents a sublevel open stoping using long hole with back filling method particularly for inclined medium thick orebodies This method not only changes the temporal sequence of ore stoping and realizes transportation using gravity and trackless devices but

Application of similar VCR method in caving engineering of metal mine

·West mining area of Rongguan mining will switch to pillarless sublevel caving method in mine recovery under ∇1158 level In order to ensure the smooth progress of projects the 6 gobs in ∇1158

Possible variations of sublevel caving method in order to

The final decision on most suitable variant of sublevel caving beside parameters analyzed in this paper also depends on technical issues related to the drifting technology long hole drilling and problems related to their operation in Jama Bor of Mining Method from the Technoeconomic Point of View in the Conditions of Mining the Copper

Block Caving Mining Method Application Of Springer

·Block caving is a mining ore mining method in which deep hole or medium deep hole drilling blasting technology is applied for caving at one time in a stage The layout of ore blocks and extracting technology are generally similar to that of sublevel caving method with sill pillar and external force of drilling blasting is required for caving

Block Caving Mining Method Transformation and Its

·The block caving mining method has become increasingly popular in the last two decades Meanwhile Indonesia has several potential ore bodies which have not yet determined suitable mining methods

NEU

· Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines Northeastern University Shenyang 110819 China; Yang T Wang P Yu Q et al Effects of lateral opening angle on ore drawing in pillarless sublevel caving based on PFC2D[M]

Sublevel Caving Method with Sill Pillar Springer

·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 ofeachsublevel andstopingoforeproceedsfrom the top sublevel to the bottom sublevel Fig 1 It is also called sublevel caving method with bot tom

Raise Caving—A Hybrid Mining Method Addressing

·Originalarbeit body thickness room and pillar methods or sublevel stop ing methods are applied for ore extraction [29 30] Principally raise caving is based on the application of

Evaluation of the use of sublevel open stoping in the mining

·Among the currently used methods for moderately dipping medium thick orebody mining the room and pillar mining method accounts for 55% of cases whereas the inclined drawpoint in footwall method of block caving [8] and the cut and fill method account for approximately 18% and 24% of the cases [9] [10] of low production

Experimental Study of the Inclined Slices Sublevel Caving Method

Abstract The orebody in Xiaoxingshan mining area of Xingshan iron mine is layered inclined the sublevel caving method without sill pillar was used for mining with drift perpendicular to strike resulting in high ore loss and dilution serious underground pressure behavior at hanging wall side of drift large amount of roadway support engineering and so

Study on the Effect of Blast Delay Time Between Blastholes in Sublevel

·Reasonable delay time between blastholes is imperative in improving the blasting effect and mining efficiency At present the research findings on the effect of inter blasthole delay time in sublevel caving are sparse In this study the effects of different delay times between blastholes in sublevel caving were studied through numerical simulation and field

Optimization of ring blasting in sublevel stoping

·Open stope mining is the most common mining method employed in underground hard rock mines in Canada It is characterised by relatively small single lift stopes 20 000 to 100 000 tonnes and

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 high flexibility; the

Classification of Mining Methods for Deep Orebodies

·An important point in Agoshkov and Imenitov s mining method classifications is the lack of the systems of chamber mining with systems are of use in longwalling and chamber and pillar working at 1000 m depth and deeper The underground chamber and pillar mining with backfill is applied extensively in Canada Inco Geco Kidd Creek Mines

Mining Methods SpringerLink

· Sublevel Caving Sublevel caving is another method available for mining of the large steeply dipping ore bodies Fig This technique uses sublevels developed through the entire ore body at regular intervals On each sublevel a system of the drives and crosscuts is developed following a geometrically systematic layout

Sublevel Stoping Mining Method SpringerLink

·Since the 1970s the sublevel stoping mining method Fig 1 has been an open stope mining method with relatively advanced technology high mechanization and efficiency reasonable safety and low loss for the application of trackless excavating equipment in the main features include 1 The stage height is 40 60 m and can be classified

A new mine planning tool for sublevel caving mines

The SLC mining method is a mass mining method in which all material to be mined needs to be blasted In this sense it differs from the block cave mining method which relies on gravity and stresses to fragment most of the rock to be mined Because of the need to blast the rock the orebody has to be divided into a regular network of tunnels

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 bottom structure

A visco elastic model for analysis of ground subsidence due

·The ground movement process induced by the pillarless sublevel caving method is a complicated process According to theory of rock rheology the theoretical model for the prediction and analysis