とは - rock.mine.kyushu-u.ac.jp

Underground Mining Method (Czech Republic, Uranium Mine) ... Footwall Wall 60m 16m 86m 58m 56m 88m 24m 20m 4m 4m 2m Ramp Roadway. Highwall Mining System (Australia, Indonesia) Punch Longwall Mining System

INSTALLATION AND PROCEDURES – Mining Science and …

Attach washer and nut, if not attached during installation. (It is possible to install a complete unit in on operation.) In most modern bolting systems the plate and washer are added prior to installation. Pretesioned systems require the bolt to be tightened to a predetermined level.

Longwall Mining - SlideShare

Apr 30, 2010· LONGWALL MINING Venkat . HR - no pillar remnants Costs - lower especially support costs Personnel concentrated in one place Training - easier method to learn Roof - can be weak but might affect gateroads Product coal is easy to wash, less fines Ventilation is more concentrated - good air upwind of shearer

Maptek - Highwall stability in longwall mining

Mining of longwalls under or adjacent to large voids such as stream valleys, escarpments or cliffs is commonly associated with heavily vegetated or steep areas, where survey access is limited and interpretation of any surface movement data is complicated. The punch longwall layout provides access to deploy radar and laser scanning technology.

Highwall mining - SlideShare

Mar 13, 2012· Highwall Mining system 6. Highwall Mining system Video 7. High wall Mining Technology 8. High wall Mining Technology – Auger Type• Consisting of single or dual cutting heads with coal being cleared by spiraled flights, creating circular entries 9. High wall Mining Technology – Auger TypeDUAL HEAD AUGER 10.

Highwall stability in longwall mining

The Maptek laser system can scan the entire wall . in six minutes, depending on the block size to be monitored. Highwall stability in longwall mining. Punch longwall layout showing highwall and low wall, with gateroad access at base of highwall View down a Broadmeadow pit. Maptek 8820 laser scanner used with Sentry monitoring system in early 2017

STABILITY ANALYSIS OF A LONGWALL MINING IN NARVA …

method is the punch-longwall mining method. Enefit Kaevandused AS, one of the major oil shale companies in Estonia, plans to employ this technology in exploiting some of its resources in the near future. This thesis examines the different stability problems related to the planned punch-longwall mining project in Narva oil shale mine.

Highwall stability implications from longwall mining at ...

Punch longwall mining at Broadmeadow mine commenced in 2005 from Ramp 4 of the Goonyella Riverside Coal Mine, mining longwall blocks from east to west toward the highwall and sequencing them north to south (Figure 5). Longwall blocks 15 were recovered from this - first pit.

MODERN MINING TECHNOLOGY FOR COAL EXTRACTION

2. Mining, geological, and other information is achieved at an early stage 3. The whole infrastructure of first punch set can be easily used in second set. 4. Future gate roads in adjacent area can be made in advance as two punch longwall operation is independent of each other due to the use of barrier pillars 5. Manpower requirement is less. 6.

Principles of Longwall Mining - YouTube

Sep 10, 2012· It includes an explanation of the different products/key components of a longwall mining system (longwall shearer, automated plow system, AFC face conveyor, line pans, CST drive system…

INSTALLATION AND PROCEDURES – Mining Science and Technology

Attach washer and nut, if not attached during installation. (It is possible to install a complete unit in on operation.) In most modern bolting systems the plate and washer are added prior to installation. Pretesioned systems require the bolt to be tightened to a predetermined level.

Highwall Stability due to Punch Mining at Opencut Coal ...

Highwall Stability due to Punch Mining at Opencut Coal Mines ... The punch board highwall mining system is introduced in the coal mines in Indonesia as it is the best and most effective mining ...

Punch Longwall Mining | Introduction | underground COAL

Punch Longwall Mining. This is a rather specialized type of mining which is only applicable where a seam is exposed at the highwall of an open cut mine which has reached the economic limit for open cut mining.

Punch Longwall Mining ~ Mining Engineering Science

May 26, 2017· Punch Longwall Mining. ... The term punch mining is only applied where a series of such longwall blocks is extracted, each in effect being a small underground mine. It is not used to describe the case of a large underground mine being developed by driving the mine access from a highwall or outcrop.

Longwall Mining Overview | Introduction | underground COAL

Longwall mining systems are capable of producing significant outputs from a single longwall face – 8 million tones per annum or more. When operating correctly the coal is mined in a systematic, relatively continuous and repetitive process which is ideal for strata control and for associated mining operations

Mining & Metals | VRT Systems

BMA's punch longwall underground operation on the Goonyella Riverside lease commenced longwall mining in August 2005. Unlike most underground operations which rely on extensive, high cost development works, Broadmeadow accesses the seam direct into the highwall of …

Application of highwall mining system in weak geological ...

The punch longwall mining system for open cut mining helps in coal recovery and in understanding of the underground mining in Indonesia but due to high cost associated with it and the geological ...

4 Mining Engineering Education - MADEN

c) longwall mining machinery and equipment d) ventilation and environmental aspects of longwall mining e) geomechanics and ground control in longwall mining f) longwall change over techniques g) punch longwall mining h) glossary of longwall mining terms and references, and i) …

SYSTEMS – Mining Science and Technology

"Z" system The "Z" system provides the greatest pressure differential accross the goaf and gives the most flexibility for the use of dilution intakes. It is used in coal seams that have a very high gas content ( > 10 m3/t ), this type of ventilation system is used in Appin Colliery which has a gas content of 55 m3/t.

punch longwall - Mining Magazine

Meet the industry leaders who shape the Future of Mining across Europe, Middle East and Africa more events. jobs; Webinars. Upcoming Mining Magazine webinars ... Punch longwall - Page 1 of 1. Power chains. As longwall cut-and-load speeds increase, face conveyors have to …

Effect of Punch Longwall Retreat on Highwall Stability

Luke Clarkson, Effect of Punch Longwall Retreat on Highwall Stability, in Naj Aziz and Bob Kininmonth (eds.), Proceedings of the 16th Coal Operators' Conference, Mining Engineering, University of Wollongong, 10-12 February 2016, 509-521.

Face Area Haulage | Introduction | underground COAL

Face Area Haulage. With virtually all main coal haulage systems within the seam being by conveyors which start from a more or less fixed point, some arrangement is needed to bridge the gap from the coal cutting machine to that point.

Fully Mechanized Longwall Coal Production - YouTube

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Longwall mining - definition of Longwall mining by The ...

Longwall mining synonyms, Longwall mining pronunciation, Longwall mining translation, English dictionary definition of Longwall mining. n a method of extracting coal from a mine whereby a long wall of coal is mined at one time ... has launched a new system for monitoring the tension in chains used in industrial conveyor belts, such as longwall ...

June 2019 Newsletter

The punch longwall layout provides access to deploy radar and . laser scanning technology. An ... Sentry system was trialled alongside a radar system on LW10 and used exclusively for LW11. Both systems enabled ... Punch longwall mining increases . the risk of mine inundation due to the low elevation and wide

THE MODERN WONGAWILLI METHOD – Mining Science and …

The production and productivity of the Wongawilli system is tied up with coal cutting, support setting and coal clearance systems deployed. It is clear from Table 3 that correct combination of equipment and operational practices can lead to higher output and productivity as that shown by United, Cook and South Blackwater collieries.

Punch Multi-slice Longwall Mining System for Thick Coal ...

30 Punch Multi-Slice Longwall Mining System for Thick Coal Seam under Weak Geological Conditions A new multi-slice top coal caving mining method based on the concept of punch longwall and top coal caving methods is proposed. The concept of the new

Anotherpunch •In thewall

Punch longwall mining - a longwall min-ing system implemented through an existing open cut mine. Pros: lower development cost. Cons: needs to retain and maintain the open cut surface infrastructure throughout the life of underground operations; surface subsi-dence. Solutions: minimisation of the foot-print once the open cut operations are com-