628 Caving 2022, Adelaide, Australia Plenary session three The focus of lateral development progressively switched to development of the block cave mine footprint; the apex, undercut, extraction and haulage levels whilst construction focus switched to construction of material handling system 1 (MHS1) – comprising Primary Crusher 1 and ...
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After careful planning and decisions, mine operation at the Grasberg Block Cave (GBC) at PT Freeport Indonesia has reached yet another significant milestone. The completion of the crusher, within a remarkable 14 …
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ore to the caving glory-hole. Later in 1945, the company made a complete switch from block caving to open pit mining with truck haulage. By early 1947, a pit crusher system, glory-hole orebin, and conveyor system to carry crushed ore from the pit to the mill had been installed.
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The crusher breaks it down into smaller pieces, which are then loaded onto a conveyor. Transported to an ore skip and hoisted, via the vertical shaft, to the surface to be processed to the mill. The block cave ultimately breaks through to the surface and a subsidence zone is formed.
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Underground mining methods become necessary when the stripping ratio becomes uneconomical, or occasionally when the surface use of the land would prohibit surface mining. …
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While Laubscher (2000) set the fundamentals of caving knowledge, the mining method evolving into deeper footprints and stronger rock masses have brought new challenges. This paper discusses industry-published cases and learnings from evolving risks with the transitions to the increasing size of crusher chambers, footprint dimensions and heights ...
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Authors Title Year; Hanrahan, S: Setting it up for success: considerations for caving projects Caving 2022: Proceedings of the Fifth International Conference on Block and Sublevel Caving, Caving 2022: 2022: Campbell, R: Risk, lessons and opportunities: a unified knowledge management approach for mass mining Caving 2022: Proceedings of the Fifth International …
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48 BLOCK CAVING block caving comes down to two factors – less access to large orebodies near the surface and an improvement in the knowledge of caving mining methods. "It is becoming increasingly difficult to find large, near-surface orebodies that are suitable for open pit mining methods which will also yield high production rates
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The E26 SLC mine is a sublevel caving operation involving construction of the sub level horizon followed by retreat drill and blast of that horizon, with the material above allowed to freely cave to fill the opened voids. ... The latest crusher is noteworthy as the world's first "double-mouth" jaw-gyratory crusher, developed by ...
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The Chuquicamata underground mine in the Atacama Desert in northern Chile is one of the largest planned mining projects in the world to use block caving with macro-blocks option to mine copper ore. ... and the stability and support design of crusher chambers, transfer caverns and several large excavations. ...
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Mining plans relying on drilling and blasting for fragmentation control will, no doubt, show greater uniformity in size of oversize, but great variations are to be expected in the size distribution of ROM ore from mine to mine. Assuming a successful crusher can avoid direct attack of the three-to-five font major fragment dimension indicated in ...
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The Chuquicamata underground mine in the Atacama Desert in northern Chile is one of the largest planned mining projects in the world to use block caving with macro-blocks option to mine copper ore.
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Abstract: The ore handling system layout plays a fundamental role in cave mining projects, not only because it is one of the main drivers in the production capacity and reliability of the mining system, but also because it is a fundamental variable in the footprint's development time and cost (Paredes et al. 2016). In terms of ore handling system definition, the governing paradigm in …
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Northparkes is also the first mine to use Thyssenkrupp's standard indirect fed jaw-gyratory crusher BK 63-75, which was intended for the mine's newly developed block caving concept. "The ...
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mining system design for current supercaves can be classified into two types: (1) LHDs tipping directly into orepasses inside (below) the footprint, and (2) LHDs tipping directly into crusher …
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Longwall Mining of Coal. Longwall mining of coal is a high production and high productivity method, employing sophisticated electrical, mechanical, and hydraulic systems, as well as computer-based monitoring and control systems. Most modern (coal) longwall faces are semi-automated. It is noteworthy that longwall operations in trona mines utilize essentially the same …
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With more underground developments considering or implementing caving methods of mining, the selection of the material sizing systems is also influenced by the caving fragmentation. Traditionally, crusher systems are used for material sizing in large hard rock mines, with the crusher installation and its ancillary equipment representing a ...
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Block caving is a highly resource-efficient method of underground mining, in which large underground ore blocks are cut from beneath, allowing the ore to collapse under its own weight. After collapsing, ore is drawn through drawpoints and conveyed to a crusher. In DOZ block caving, LHD loaders transfer ore slurry into ore passes leading to chutes.
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At approximately 1,500 m below surface, the DMLZ is one of the world's deepest caving operations. The current undercut area has reached 60,000 m2, within a 1,200 m triangular-shaped perimeter. ... 'Excavation Design and Ground Support of the Gyratory Crusher Installation at the DOZ mine, PT Freeport Indonesia', Proceedings of Massmin 2000 ...
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ABSTRACT:. Rana Gruber is an iron mine in the North of Norway. It is located in a foliated gneiss host rock, and the ore body is about 70 m wide and more than 300 m deep. The ore starts from the surface and continues to go down for more than 300 m deep. Due to this situation, mining cost could be reduced by changing the mining technique from sublevel …
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The PMC underground copper mine employs a block caving mining method for the extraction of ore beneath the old open cut void. Production has been sourced from Lift I of the block cave from 500m below the floor of the open cut void. ... 380 m below Lift I, with a mine life extension to 2033. Crusher 5 excavation. Surface Works - Underground ...
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This is particularly true when dealing with rock undergoing blasting primary breakage or collapse and drawing in a caving mine. Crusher and grizzly openings are the first size restriction for the materials handling process and therefore may plug by bridging or by oversized material. When this happens, several courses of action can be taken ...
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Interaction between the block cave and the pit slopes at Palabora mine Overview Project description and history The Palabora Mining Company (PMC) was founded in 1956 and open pit mining operations commenced in 1966 at rate of 30 000 tpd increasing to 82 000 tpd prior to closure in 2002. In total some 960 Mt of ore and 1 300 Mt of waste were mined.
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Glenn Sharrock — ITASCA Australia 28/06/2024 2 Brunton, I., Sharrock, G.B. (2012) 'Full scale marker trials at Ridgeway deeps block cave mine' Proc. Massmin 2012 Conference, Sudbury. Tibbett, J.., Sharrock, G.B., Hebblewhite, B.K. (2012) 'A review on the effects of faults on the mechanics of cave propagation', Proc. Massmin 2012 Conference, Sudbury.
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Caving mining method is a mining method that realizes ground pressure management by caving surrounding rock. This article mainly introduce the classification and characteristics of caving mining method.
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Cave mining methods allow for the bulk extraction of large, low grade orebodies in a cost effective manner. The fundamental mechanics of caving involves the self-propagating yield (failure) of an ...
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Abstract: Oyu Tolgoi (OT), in the South Gobi region of Mongolia, is one of the largest known copper and gold deposits in the world. At peak production, Oyu Tolgoi is expected to produce 500,000 tonnes per annum of copper. The Panel 2 (PC2) crusher is a key component of the OT underground ore handling system, which has a total capacity of 95 ktpd; the PC2 crusher …
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Northparkes was the first mine to use the standard indirect fed Jaw Gyratory crusher type BK 63-75 for its newly developed block caving mine concept, thyssenkrupp said, with this primary crusher design becoming the "state of the art solution for block caving mines".
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Abstract: This paper provides an update of the mine design, construction, caving progress and operations status of the Grasberg Block Cave (GBC) mine. Undercutting was initiated in September 2018 and drawbelling in December 2018. Undercutting is currently proceeding in three production blocks. ... The first phase of the crusher/conveyor system ...
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Block caving is a large-scale underground mining method applicable to the extraction of low-grade, massive ore bodies. With the amount of literature available on block …
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