Sublevel Caving Mining Method With Pillar

Together with room-and-pillar mining, it is the most flexible of underground methods. In cut-and-fill mining, the ore is removed in a series of horizontal drifting slices. ... Sublevel caving. This method owes the first part of …

The design and feasibility analysis of the Sublevel Caving by Pillar Extraction mining method are described. It is a conceptual mining method devised toward the objective of improving mining …

Non-pillar sublevel caving offers the advantages of simple operation, high-intensity mining, high mechanization degree, safety and reliability, and relatively low mining costs [1,2,3,4].Therefore, it has been widely used in ore mining at home and abroad [].The purpose of mining is to discharge ore under the overburden, leading to a large loss coefficient and dilution ratio [6,7].

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.

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. The method belongs to one-step mining, which is characterized by caving at one time in the whole stage height without sublevels.

The mining method used will depend on the characteristics of the orebody, particularly thickness

Sublevel shrinkage (SLSh) is an underground mining method similar to sublevel caving (SLC) but with continuous backfilling from the top. It features a top-down mining sequence with production drifts orientated in a longitudinal or transverse way in the orebody. Fan drilling and blasting is done from the production drifts, from where the ore is then drawn. While drawing, …

Although the general geometry is the same as for the room-and-pillar method, the generic name given the system is sublevel stoping. Blasthole stoping, vertical crater retreat, and vein mining also fall under this general heading. The shrinkage stoping method is …

Weak rock mass and poor flow of material can cause excessive ore loss and dilution in sublevel caving. This paper proposes a method to establish design parameters for an inclined deposit within a weak rock mass and evaluates its effectiveness through a case study. In order to solve the problem of low production capacity and poor safety conditions of sublevel …

Caving mining method can be divided into single layer caving mining method, slicing and caving mining method, pillar sublevel mining caving method, sublevel caving mining method and block caving mining method.

The stress-strain state forecast and geomechanical assessment of ore extraction technology using sublevel drifts at a depth of 800 m shows that the design parameters of the mining system meet the ...

The size and shape of pillars depend on factors such as depth, the characteristics of the rock mass, and the chosen mining method. Pillar bursts often occur when the extraction ratio is high. ... Block caving and sublevel caving are pillar-less mining methods where the entire orebody is extracted, leaving no pillars behind for stope support. In ...

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 …

Schematic layout for sublevel caving (after Hamrin, 1982) DEFINITION: A mining method which is applicable to low grade near -vertical metallic or nonmetallic deposits. Mining progresses …

effective measure for the green mining of caving mines. Keywords: sublevel caving; numerical simulation; physical model; structural parameter; green mining 1. Introduction Non-pillar sublevel caving offers the advantages of simple operation, high-intensity mining, high mechanization degree, safety and reliability, and relatively low mining ...

Most of the Sequence Chains can be completed in five steps. Drilling a hole, and inserting a bolt to strengthen the ceiling and walls of an underground mine. A machine used to crush ore …

Therefore, it is recommended that the height of a single mining unit in the non-pillar sublevel caving method should be 2.5 to 3.0 times the width. Furthermore, due to the characteristics of ore recovery in sublevel caving, the traditional ellipsoid theory suggests that the drawing ellipsoids must intersect to ensure sufficient ore recovery ...

Although sublevel caving is a method that allows plenty of scope, flexibility and relatively high ore yield, its complexity increases as the mining depth increases. ... One of several possible routes is the establishment of …

sublevel caving mines AD Campbell Beck Engineering Pty Ltd, Australia Abstract Sublevel caving (SLC) has previously been regarded as 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.

in hard rock, longwall coal mining, sublevel caving and block caving. In this chapter, the geomechanics issues involved in each of these methods of mining will be discussed in turn. If a relevant issue has been dealt with elsewhere, the discussion will not be repeated, but a cross reference will be given. One of the major geomechanics concerns ...

Underground mining methods include room-and-pillar, longwall mining, sublevel caving and block caving. Longwall mining involves completely removing the entire coal seam in one operation by leaving no pillars and allowing the roof to cave. ... Sublevel caving method: • Sublevel caving is a mass mining method based upon gravity flow of blasted ...

that of sublevel caving method with sill pillar and external force of drilling blasting is required for caving. The method belongs to one-step min-ing, which is characterized by caving at one time in the whole stage height without sublevels. This mining method is divided into two mining schemes: stage forced caving with compensation

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 …

Caving Methods of Mining. There are three distinctive methods of working large deposits that involve, in some way, the factor of caving. Slightly different names are in use, but …

The induced caving method, proposed by Chinese scholars, is a new mining method that organically combines the natural caving method with the non-pillar sublevel caving method. It is characterized by continuous excavation of induction to induce the natural caving of upper ore-rock, which will be subsequently released in one to two sublevels of ...

Keywords: Mining method, underground mining, room-and-pillar mining, sublevel stoping, cut-and-fill, longwall mining, sublevel caving, block caving, backfill, support, ... major caving methods are: • Longwall mining • Sublevel caving • Block caving Longwall mining is used in horizontal, tabular deposits (mainly coal), while the others ...

After mining, the vertical displacement of the fault surface at the filling method was about 0.6 m, and the maximum vertical displacement of the fault plane on the mining side could be up to 1.2977 m when the sublevel height of the sublevel caving method without the sill pillar was 10 m; the maximum vertical displacement of the fault surface ...

The design and feasibility analysis of the Sublevel Caving by Pillar Extraction mining method are described. It is a conceptual mining method devised toward the objective of improving mining techniques for extraction of deep coal occurring in seams of thicknesses greater than 12 feet. ... The conclusions of the study are that the Sublevel ...

Among underground mining methods, block caving, sublevel caving, sublevel stopping, cut and fill, and stope and pillar methods are usable for the mining of metallic reserves. The true optimum solution is guaranteed for the pit limit optimization and several computer packages are available to the industry.