Punch Multi-slice Longwall Mining System for Thick Coal ... · PDF file30 Punch Multi-Slice Longwall Mining System for Thick Coal Seam under Weak Geological Conditions A new multi-slice; Match case Limit results 1 per page. Click here to load reader. Post on 06-Apr-2018. 232 views. Category: Documents. 1 download. Report.
Longwall mining could further lead to making punch entry into coal-depleted opencast mines. "Punch entry will actually make holes in an opencast mine and could create a horizontal pathway to access...
BHP Coal's Broadmeadow Mine is one . of only a few punch longwall mines in Australia. This method makes use of abandoned open cut mine strips and drives gateroads directly into the seam at the base of the highwall, with no requirement for main entries. The longwall is then retreated towards the open cut and recovered just short of the
IF ever there was a classic case of the challenges of mine conveyor design, BHP Billiton-Mitsubishi Alliance s Broadmeadow punch longwall in central Queensland would...
CASE STUDY ON LONGWALL MINING P. TAVITI NAIDU1, U.SUMAN 2, G. RANADHEER KUMAR, D. PRANEETH2, R. SHIVA KUMAR 2 ... Adriyala Mine is accessed by four Punch entries and one shaft. Two main fans of 400kw and 15,000 Cu.m/min and four booster fans of 75kw of 4,000 ...
Punch Multi-slice Longwall Mining System for Thick Coal Seam under Weak Geological Conditions Takashi Sasaoka1, Akihiro Hamanaka1, Hideki Shimada1, Kikuo Matsui1, Nay Zar Lin2 and Budi Sulistianto3 1. Department of Earth Resources Engineering, Kyushu University, Fukuoka 819-0395, Japan 2. Mine Planning Section, Ministry of Mines, Nay Pyi Taw ...
Download Citation | Punch longwall mining - Simpler, more productive and lower cost | Approval to proceed with a new underground operation, the Australian Broadmeadow Mine, was received in July 2003.
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 - …
Some mines are fortunate enough to be able to carry some extra items of longwall gear and are able to install this on the new face in advance of the completion of the previous wall. This takes a lot of the pressure off the relocation process, but the extent to which extra gear can be purchased depends on a cost/benefit analysis for that particular mine.
Rapid access longwall mining' or 'longwail punch mining' is a proposed extraction method whereby longwall gate roads are driven into a seam directly from an opencut highwall. The longwall panel thus formed is retreated back to within 40 m of the highwall providing an extremely simple, reliable and therefore highly productive longwall mining system.
Here is how longwall mining works and some of the hazards. It will take days and maybe weeks to know exactly what caused the explosion on Monday afternoon in Massey Energy's Upper Big Branch mine ...
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
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This report describes the results of ACARP research project C9007. The project was established to assist an innovative roadway development trial at Kenmare 2, South Blackwater Mine. A continuous highwall mining system (CHM) was used to develop the roadways for a proposed punch longwall operation at Kenmare 2.
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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 - …
Broadmeadows uses the punch longwall mining method, accessing coal seams directly from the pit created by the original surface mine. While longwall operations began in 2005, Broadmeadows did not adopt LTCC technology …
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. It could also be applied where a seam has an extensive natural outcrop, but there are no instances of this in Australia known to the writer.
Broadmeadows uses the punch longwall mining method, accessing coal seams directly from the pit created by the original surface mine. While longwall operations began in 2005, Broadmeadows did not adopt …
@inproceedings{Sasaoka2016PunchML, title={Punch Multi-slice Longwall Mining System for Thick Coal Seam under Weak Geological Conditions}, author={Takashi Sasaoka and Akihiro Hamanaka and Hideki Shimada and Kikuo Matsui and Nay Zar Lin and Budi Sulistianto}, year={2016} } T. Sasaoka, A. Hamanaka, +3 authors B. Sulistianto; Published 28 January 2016
The latest punch longwall articles from Mining Magazine - Page 1. Home; Surface mining. Development; Fleet; Technology / Innovation; Operational excellence; Geomechanics / Ground control; ... Meet the industry leaders who shape the Future of Mining in Australia register now. Future of Mining Americas. date: 26/09/2022 ...
Cutting Processes. It has been stated that a longwall advances by cutting slices off the block. This is relatively simple for hand worked faces and with a coal plough, but with mechanized longwalls using shearers the means of doing this …
Punch longwall mining increases the risk of mine inundation due to the low elevation and wide catchment area. Large levees are constructed to protect the open pit from flooding by adjacent rivers. Sumps constructed against the …
Longwall mining could further lead to making punch entry into coal-depleted opencast mines. "Punch entry will actually make holes in an opencast mine and could create a horizontal pathway to access underground coal in the opencast mine. Punch entry could be done through a mix of technologies, and CIL plans to identify and implement five such ...
The Broadmeadow punch longwall proposal was conceived as early as the 1990s when options were investigated to start an underground on the Goonyella open cut lease. During mine feasibility stage, a trial adit was driven from the southern end of Goonyella's ramp 4 pit for a distance of 3.2 kilometres due east.
Longwall mining activities alter the exsisting ground stress field, this changed stress field is known as induced stress. Extraction of coal by longwall mining induces a redistribution of stresses causing the rocks near the mining excavation to accomodate a redistributed load. Effective and efficient longwall mining is dictated by the […] Read More
longwall mining Mining. a mining method in which very long rectangular blocks of coal are defined during the development stage of the mine and then extracted in a single continuous operation by an automated cutting head moving parallel to the coal face. When the coal is cut, the working area is protected by a movable, powered roof support system.
PUNCH LONGWALL MINING – Mining Science and Technology. Figure opposite shows a general layout of punch longwall mining. The aim of this method is to mine coal form the highwall of an open cut operation, in which the stripping ratio is …
Longwall mining could further lead to making punch entry into coal-depleted opencast mines. PSU miner Coal India (CIL) is looking afresh at underground (UG) mining, with an aim to resume existing ...
Made available by U.S. Department of Energy Office of Scientific and Technical Information ...
Longwall mining of coal originated in the 1800s as a so-called 'hand-got' mining method (pick and shovel) using timber props with headboards as face support. ... Extent of punching of standing support into floor strata. Full size image. Hanson et al. ...
However, if the conventional mining systems and designs introduced in US, Australia and European Countries are applied, several geotechnical issues can be expected due to the mines' weak geological conditions. From these backgrounds, this paper proposed a punch multi-slice mining system with stowing for thick coal seam under weak ...