Ore mining at PT. Freeport Indonesia (PTFI)'s Grasberg Block Cave (GBC) underground mine using the block caving system has potential wet muck hazard that can cause casualties, property loss and production disruption due to its ore position which is below the Grasberg open pit.

1. Introduction. Block cave mining is a mass mining method that allows for the bulk mining of large, relatively lower grade, ore bodies. In terms of cost and rate of production, bulk mining of this kind yields a substantial return per ton and has a higher …

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Explore the latest full-text research PDFs, articles, conference papers, preprints and more on MINE VENTILATION. Find methods information, sources, references or conduct a literature review on ...

Repositorio académico de la Universidad de Chile. Tesis, artículos y libros publicados en formato digital con distintos niveles de acceso

Block Caving, Suatu cara penambangan yang dimulai dengan membuat suatu "undercut" terhadap suatu block endapan bijih. Untuk membuat awal runtuhan berjalan lancar, maka "undercut" sebaiknya dibuat antara 2,5 - 6,0 meter tingginya.

With the tendency of world ore deposits to be deeper and of lower grade, block caving is becoming an increasingly important mining method. As with any underground method, an adequate mine ...

A study of Isolated Draw Zones in Block Caving Mines by means of a large 3D Physical Model. International Journal of Rock Mechanics and Mining Sciences, vol 44, issue 6, pp. 860-870. 8. Castro R, Trueman, R. 2008. An experimental review of gravity flow for block and panel caving applications In Proceedings of Massmin2008, 9-11 of June, Lulea,

Proceeding PIT IAGI YK 2012 - FULL

mined by block caving. If an orebody is suitable for mining by block caving, the fragmentation characteristics will have a bearing on the method of ore extraction. Suitability of an Orebody to Block Caving Ideally the orebody should be such that the rock within the stope fails readily and the area outside the stope remains intact.

thesis. adzan, mahgrobi budi ... geo mining energy di kecamatan tanjung palas timur kabupaten bulungan provinsi kalimantan timur. ... prediksi pengaruh penambangan dmlz (deep mill level zone) menggunakan metode block caving terhadap jumlah air doz (deep ore zone) pt. freeport indonesia. other thesis, upn "veteran" yogyakarta.

Nowadays along with population growth, industry development, consumption of mineral resources and the fact that the reserves on hand are running out, the depth of surface and underground mines for further exploitation are increasing. During recent years, in underground mining, the block caving method for low-grade and large-scale deposits has shown a growing rate of application. The …

Initial capital investment for the mining methods ranged from $77,200,000 for chamber and pillar, to $122,872,000 for block caving, using LHD's. Mining costs, including all direct, indirect and fixed costs, except royalty and lease payments, ranged from $1.04 per ton for chamber and pillar to $1.35 per ton for block caving, using LHD's.

Synopsis : Numerical Modelling of Surface Subsidence Associated with Block Cave Mining Using a Finite Element written by Alexander Vyazmensky, published by Anonim which was released on 02 November 2021. Download Numerical Modelling of Surface Subsidence Associated with Block Cave Mining Using a Finite Element Books now!Available in PDF, EPUB, Mobi Format.

The Sumpal Field is a large gas field located in the Corridor block of South Sumatra which currently produces from fractured pre-Tertiary age crystalline rocks. During the exploration and development program, a sandy interval in the Baturaja Formation was encountered in many of the wells.

Over the last 10 years, the trend toward the mining of deeper, higher tonnage deposits, and lower grade orebodies have made caving mining methods (Block and Sublevel) increasingly attractive to the global mining industry. This is due to their low mining cost. During this period the scale of these caving operations has increased significantly.

This thesis takes 10-704 fully mechanized caving face of Pang Pangta mine as project example and has studied law of top coal movement and destruction on fully mechanized top coal caving face, law of overburden movement and stress distribution during working face advancing through numerical calculation, theoretical analysis and field measurement.

Master student at the Block Caving Laboratory (BCLAB) - University of Chile Thesis: Numerical Modeling of Water Flow in Mining Caving Operations The research area corresponds to the study of fundamentals mudflow in underground mining, and the design of extraction strategies for saturated ore in caving mining.

The Kiirunavaara mine is one of the largest sub-level-caving (SLC) mines in the world and has been in underground operation for more than 50 years. The mine has been the focus of several case studies over the years. The previous works have either focused on the caving of the hanging wall, using the footwall as a passive support, or focused on the footwall using the hanging wall to apply a ...

This thesis describes and substantiates the design and development of CaveCad, a state of the art integrated cave management system. CaveCad is Rio Tinto proprietary software. The scope of this project is to design, develop and implement an integrated cave management system for Rio Tinto Underground Technology Centre. A successful outcome will result in the implementation of CaveCad …

The exploitation characters of 402 panel of the Jin Hua Gong Mine could be summarized as three points including hard roof,stiffness seam and large mining height.The fully mechanized caving faces were covered by 9# goaf and geological conditions were particular as well as excavate circumstances were scurviness,besides that it was hard to ...

To achieve the first objective, discrete event simulation techniques were applied in the short-term planning process of horizontal developments in a case study of a mine operated by Panel Caving. The simulation model was built and calibrated in simulation software especially designed for mining…

at both pastefill block, the f ailure will occur at the bottom side of the block. This failure type is similar with the t ype of failure predicted by analytical analysis which is caving f ailure.

Ore mining at PT. Freeport Indonesia (PTFI)'s Grasberg Block Cave (GBC) underground mine using the block caving system has potential wet muck hazard that can cause casualties, property loss and production disruption due ...

Through the use of an integrated FEM/DEM-DFN modelling technique this thesis presents a new approach to simulation of block caving induced surface subsidence a…

These are intended as an aid to engineering judgment for decision makers at the pre-feasibility and mine design stages. This study also addresses one of the most challenging problems in mining rock engineering - the interaction between block cave mining and a large overlying open pit, focusing on caving induced step-path failure initialization.

The roof control of caving mining is dominant in our country,which causes serious surface subsidence,accompanys a large amount of structures damaged.And gangue etc.waste also has a large-scale land occupation which causes secondary geological disasters of landslide,spontaneous combustion,dust etc.By solid backfilling mining method,overlying ...

the range and distribution of the sizes of the rock blocks expected to be induced by caving. In the context of block and panel cave mining, fragmentation processes are characterised as: i) In-situ (natural) Fragmentation: in-situ blocks that are naturally present within the rock mass before any mining activity takes place.

International Journal of Rock Mechanics & Mining Sciences 39 (2002) 617–632 Quantifying stresses and support requirements in the undercut and production level drifts of block and panel caving mines R. Truemana,*, M. Pierceb, R. Wattimenaa aJulius Kruttschnitt Mineral Research Centre, The University of Queensland, Queensland, Australia

Keyword: caving mining, flow-ability, hang up, vertical stresses, fines and humidity content. 1 Introduction In block/panel caving, ore production is affected by interferences associated with the caving process, especially those related to the gravity flow, such as hang ups and over size rocks.

The work focuses in underground Block and Panel cave mining, with multiple infrastructure levels (production, transfer and haulage). It was identified which parts of the mining infrastructure could be analyzed as individual components in order to parameterize the reliability of each component as a function of the expected number of interference ...

Mawdesley, CA 2002, Predicting Rock Mass Cavability in Block Caving Mines, PhD thesis, University of Queensland. McMahon, BK & Kendrick, RF 1969, 'Predicting the block caving behavior of orebodies', preprint 69-AU-51, Society of Mining Engineers of The American Institute of Mining, Metallurgical, and Petroleum Engineers, New York ...

SMI-BRC alumnus awarded international prize for mining PhD thesis. 20 Aug 2013. Former BRC student Dr Matthew Pierce has been awarded the 2013 Manuel Rocha Medal for his thesis A Model for Gravity Flow of Fragmented Rock in Block Caving Mines by …

In addition, chimney caving was found to be a prominent secondary surface disturbance feature. Figure 4 illustrates the terminology used to describe subsidence features related to block and panel caving. Historically, mining engineers have defined the extent of subsidence features using angles measured from the base of the undercut.

The business case to continue with the mining of the Chuquicamata orebody is to change from the current large open pit to a novel macroblock variant block caving geometry. This requires a production rate of 140,000 t/d (50 Mt per annum), with a continuous material handling system to achieve the 7-year ramp-up to full production.