Development of an optimal draw control strategy for a sublevel caving …
Introduction. For sublevel caving (SLC) operations, loading at the draw point is a complex process because of the confined blasting conditions, chaotic material flow and continual mixing of ore and waste (Power Citation 2004; Hustrulid and Kvapil Citation 2008; Brunton Citation 2009; Brunton et al. Citation 2010; Wimmer Citation 2014; Nordqvist and Wimmer …
(PDF) Topic 7: Underground Mining Methods Longwall Sublevel Caving
Topic 7: Underground Mining Methods Longwall Sublevel Caving Block Caving Hassan Z. Harraz hharraz2006@yahoo 2014- 2015 This material is intended for use in lectures, presentations and as handouts to students, and is provided in Power point format so as to allow customization for the individual needs of course instructors.
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.
Study on the law of ore dilution and loss and control
The non-pillar sublevel caving method is widely used in metal mining production. The characteristics of this mining method include completing preparatory cutting, followed by drilling and ore ...
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 …
Optimum Sublevel Height and Drift Spacing in Sublevel …
In September 2007, the mine decided to adopt the underground mining method, and started the shaft development for the sublevel caving mine with a production scale of 75,000 tons/year. Subsequently, in August 2012, the mine began partial stoping work. The sublevel height is divided into 13 and 14 m and the drift spacing is chosen at 12.5 m.
Block Caving Mining Method: Transformation and Its …
The second caving method, Sublevel Caving, is an underground mining method proposed for moderate and strong strength of ore, weak rock strength, tabular/massive deposit shape, steep deposit dip, large thick deposit size, moderate ore grade, moderate uniformity grade and moderate depth [10]. Sublevel caving is a mass mining method in
Investigation into the Behaviour of a Support System and …
Monitoring of strata control parameters and behaviour of a powered support was carried out during an experimental trial of a mechanized longwall sublevel caving face for exploitation of a 7.5m ...
A new mine planning tool for sublevel caving mines
A new mine planning tool for sublevel caving mines D. Villa and T. Diering 240 Caving 2010, Perth, Australia Figure 3 3D Examples of ring creation process 3 Material mixing Material mixing is really important in the evaluation of a SLC project, when a ring is blasted the first part of the ring is drawn cleanly but then waste from above and ...
9.4.2b Sublevel Caving | MNG 230: Introduction to Mining …
9.4.2b Sublevel Caving. Sublevel caving shares many similarities with block caving, with one notable exception, which is responsible for this method: the orebody is competent and will not cave under its own weight. The host rock, on the other hand, is weak and caves behind the ore as it is extracted. Consequently, the orebody needs to be ...
A global review of recovery, dilution and draw control in sublevel …
Abstract: Sublevel caving (SLC) has previously been regardedas a high dilution and low recovery mining method requiring specific orebody geometry and rock mass conditions to be successful. Progress in the past 20 years at numerous operations has broken this misconception. A wide range of challenges have been encountered and mitigated at operations around the world, …
Mathematical Programming Application in …
This paper reviews all mathematical programming models presented in sublevel caving production scheduling, highlights the inherent characteristics of the sublevel caving that affect production, and puts forward …
Study on Rock Fragments Penetration of Overlying Strata in Sublevel Caving
Sublevel caving is a mining method to realize ground pressure management by caving surrounding rock. With the caving of ore, the surrounding rock is forced (or naturally) to fill the goaf to control and manage the ground pressure [1,2,3,4].Sublevel caving is a large-scale mining method with low cost and high efficiency, which is widely used in metal mines.
The future of sublevel caving is being assessed
Large-scale sublevel caving, which is employed in both the Kiruna and Malmberget mines, is a resource-efficient and cost-effective method for large-scale underground mining. LKAB has applied this method successfully and …
Analysis of the surface subsidence induced by sublevel caving …
Sublevel caving is a mass mining method based on utilizing the gravity flow of the blasted ore and caved waste rock. Sublevel caving without sill pillars is the main mining method used in underground metal mines in China (Li et al. 2006). Sublevel caving has the characteristics of safety, mechanization, flexibility and allows a favorable work ...
Investigation into the Behaviour of a Support System and …
Monitoring of strata control parameters and behaviour of a powered support was carried out during an experimental trial of a mechanized longwall sublevel caving face for exploitation of a 7.5m thick coal seam. Field observations indicated that the requirement of support density for underwinning of top coal by sublevel caving under intact strata is different from that for …
Overview of Underground Metalliferous Mining | SpringerLink
Room and pillar stoping, cut and fill stoping, sublevel stoping and sublevel caving methods are used for the exploitation of mineral deposits in India. The variants of sublevel stoping are used for the faster pace of mineral exploitation. This method has advantage of large diameter and deep hole drilling and blasting.
9.4.2b Sublevel Caving | MNG 230: Introduction to …
9.4.2b Sublevel Caving. Sublevel caving shares many similarities with block caving, with one notable exception, which is responsible for this method: the orebody is competent and will not cave under its own weight. The host rock, …
Underground mining of thick coal seams
Only one attempt was made to introduce mechanised longwall sublevel caving face [18] for thick seam mining in India without any encouraging result. A number of other longwall projects including longwall (powered support) face of Charcha colliery and longwall (powered support) face of Kottadih colliery have failed due to single technical reason ...
Draw Control Strategy for
excavated using induced caving, hence the name sublevel caving (Cokayne, 1982). The present system of sublevel caving is highly mechanised; the ore is completely drilled and then blasted. The mine design and layout have evolved from small scale rings with sublevel intervals of 9m to large scale rings with sublevel intervals of up to 29m
Underground Mining of Metalliferous deposits
(ii) Access to mineral deposits: Types of access and selection criteria, location, size and shape; Adits, Inclines, Declines, Shafts; Conventional and special methods of excavation, lining, …
(PDF) Blasting in sublevel caving
PDF | On Nov 6, 2023, Slavko Torbica and others published Blasting in sublevel caving | Find, read and cite all the research you need on ResearchGate
Investigation into the behaviour of a support system and …
Sublevel caving is an established practice for the exploitation of thick seams under weak and laminated roof strata and a number of attempts have been made in India to use this...
Sublevel caving method layout [1].
To deeply understand the mechanism of the rock mass caving and associated surface subsidence during sublevel caving mining, the Xiaowanggou iron mine was selected as an engineering project...
Sublevel Caving
Much of the theory upon which the Sublevel Caving (SLC) method is based was developed in Scandinavia many years ago. It was based mainly on bin' theory and ellipsoid of draw' configurations derived from sandbox models. In many cases, classical SLC layouts influenced by these early theories obtained relatively poor results. Early dilution entry, low tonnage factors …
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. The references to block caving mining projects worldwide and the potency of metal deposits in Indonesia were reviewed to determine the requirements of ore …
Structural Parameter Optimization for Large Spacing Sublevel Caving …
Non-pillar sublevel caving is beginning to use large structural parameters in China. Appropriate structural parameters can effectively control the loss and dilution of stope and improve ore ...
(PDF) Mathematical Programming Application in Sublevel Caving
Among all underground mining methods, the sublevel caving method is a common method with moderate development requirements, a high production rate, and a high degree of mechanization and flexibility.
(PDF) IRJET- A Critical Review of Indian …
The Blasting Gallery method, Multi-slicing Longwall Method, Hydraulic Mining and sub-level caving method were applied in some Indian geo-mining conditions with limited success.
Underground Sub-level Caving Recommences at Big Bell
The sub-level caving mining methodology has considerable advantages over long-hole open stoping methods or up-hole benching methods typically used in the Australian gold sector. The progressive mitigation of natural cave filling allows for nearly full extraction of ore without a requirement for pillars. The bulk nature and size of the stopes ...