Top Coal Caving Technology

Top Coal Deformation Characteristics of High Section Fully ...

Top Coal Deformation Characteristics of High Section Fully ...

Jun 27, 2010 · Meanwhile there are some challenges, such as low caving ratio, roof falling induced by local and large area collapse of top coal in workface, and injury induced by gas accumulation. After crack weakening of high section top coal for extrasteep seam (over 60º), broken top coal (granular medium) has obvious nonlinear movement characteristics.

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Prediction of topcoal caving and drawing characteristics ...

Prediction of topcoal caving and drawing characteristics ...

If the top coal is too thick, it is difficult to achieve the sufficient loosening of top coal in the roof control area and ensure that caveins of top coal occur within the caving zone. Therefore, a reasonable caving ratio is of vital importance to topcoal caving. In this study, four caving ratios, including 1/3, 1/, 1/4, and 1/, were determined according to the seam thickness and ...

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Viewpoint Mining Magazine

Viewpoint Mining Magazine

Longwall TopCoal Caving isn't just an alternative mining technique; it can be the difference between a productive, profitable mine and an unsustainable operation. The technology reduces waste and operating costs, making for a more efficient operation. "By achieving the highest productivity possible, operations can stay profitable even in ...

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Evolution Analysis of Thick and Hard Overburden Strata and ...

Evolution Analysis of Thick and Hard Overburden Strata and ...

Jun 18, 2021 · Feng, Cui, Yupu, Zhou, and Zhou Yang. "Evolution Analysis of Thick and Hard Overburden Strata and WaterConducting Fractured Zone in Fully Mechanized Top Coal Caving Working Face." Paper presented at the 55th Rock Mechanics/Geomechanics Symposium, Virtual, June 2021. Download citation file: Ris (Zotero) Reference Manager; EasyBib; Bookends ...

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Coal Engineering

Coal Engineering

Research on intelligent topcaving technology of thick coal seam and key technologies of precise control of topcaving coal. Coal Engineering 2020, 52 (9): .

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Evaluation of mine scale longwall top coal caving ...

Evaluation of mine scale longwall top coal caving ...

 · Mining Science and Technology (China) Volume: 21 Issue: 6 Pages: 787796 Abstract: A minescale analysis of Longwall Top Coal Caving (LTCC) is performed using a continuum mechanics finite element solver called COSFLOW.

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PDF (Mobile)

PDF (Mobile)

Coal Engineering ›› 2019, Vol. 51 ›› Issue (10): 1619. doi: /ce. Previous Articles Received: Revised: Online: Published: PDF (Mobile) 0 Abstract CLC Number: TD823 Cite ...

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Boundary distribution of topcoal limitequilibrium zone ...

Boundary distribution of topcoal limitequilibrium zone ...

In fully mechanized caving mining, the earlier the top coal enters the limitequilibrium zone, the easier it is for leakage to be induced in front of the support. As the dip angle of the seam increases, the leakage of the top coal in front of the support drastically reduces the .

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 to Supply Two Complete Longwall Top Coal ...

to Supply Two Complete Longwall Top Coal ...

The longwall top coal caving (LTCC) mining method to be employed at the Eynez East underground coal mine is a special type of longwall mining applicable to seams thicker than 6 meters (20 feet). Conventional longwall equipment has not yet been designed to operate successfully in seams thicker than approximately 6 meters (20 feet) mining height.

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CoalRock Recognition in Top Coal Caving Using Bimodal ...

CoalRock Recognition in Top Coal Caving Using Bimodal ...

Jan 01, 2017 · Fully mechanized top coal caving has been widely applied in the mining of thick coal seam due to its safety, high efficiency, high yield, and low production cost. However, lowlevel automation and intelligence have always been problems in fully mechanized technology on top coal caving.

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Appliion of retreating and caving longwall (top coal ...

Appliion of retreating and caving longwall (top coal ...

Sep 05, 2013 · (2006). Appliion of retreating and caving longwall (top coal caving) method for coal production at GLE Turkey. Mining Technology: Vol. 115, No. 2, pp. 4148.

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Mining safety of longwall topcoal caving in China ...

Mining safety of longwall topcoal caving in China ...

Jul 01, 1999 · Abstract. Longwall topcoal caving technology has developed rapidly in China, in recent years. The appliion of longwall topcoal caving can double both the productivity and the efficiency of a working face and reduce the cost of production by 30 to 50%. Using standard longwall equipment, annual production can reach 3 million metric tons (Mt ...

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Appliion Of The Longwall Top Coal Caving System In Austra

Appliion Of The Longwall Top Coal Caving System In Austra

Sep 08, #; The longwall was a China National Coal Mining Equipment (CME) top caving face, 240 metres wide and with a 2km panel length The operation is a 365 days, 24/7 operation The mine, which features two top coal caving faces and which has been operating since January, has planned utilisation to keep the output conveyor belt full.

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Recognition of rock–coal interface in top coal caving ...

Recognition of rock–coal interface in top coal caving ...

Top coal caving mining technology is widely used to mine thick coal seam because of the approach's advantages of high production, high efficiency, low energy consumption, low cost, and strong adaptability. However, a large problem exists in top coal caving with regard to heavy reliance on manual eyeballing for identifying the rock–coal ...

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Top coal caving mining technique in thick coal seam ...

Top coal caving mining technique in thick coal seam ...

International Journal of Mining Science and Technology (Jan 2017) Top coal caving mining technique in thick coal seam beneath the earth dam Wenbing Guo, Yi Tan, Erhu Bai; Affiliations Wenbing Guo School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China; Synergism Innovative Center of Coal Safety Production ...

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How does Longwall Top Coal Caving work? LTCC Mining ...

How does Longwall Top Coal Caving work? LTCC Mining ...

 · Longwall Top Coal Caving (LTCC) is a special designed longwall mining method for very thick seams (thickness is more than ) where good quality coal is being left because "conventional ...

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CR Digital, Mining 3 Partner on Top Coal Technology | Coal Age

CR Digital, Mining 3 Partner on Top Coal Technology | Coal Age

Aug 20, 2020 · CR Digital and Mining3 have established a partnership with the next phase of development in Top of Coal technology. With support from the ACARP (Australian Coal Industry's Research Program), Mining3 has been developing a measurement while drilling (MWD) system that detects the top of a coal seam while routinely drilling blast holes.

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Numerical simulation of realistic top coal caving ...

Numerical simulation of realistic top coal caving ...

Jun 24, 2021 · Top coal caving mining technology started in the 1980s and continues to this day 1, top coal caving (LTCC) mining consists of two processes: shearer cutting in .

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The sustainable development of coal mines by new cutting ...

The sustainable development of coal mines by new cutting ...

Jun 03, 2020 · 2007 Top coal caving longwall maximizes thick seam recovery—Austar's longwall system offers opportunities in seams thicker than meters. EMjEng. Min. J. 208, .

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Underground Mining Technology in Chinese Coal Mines

Underground Mining Technology in Chinese Coal Mines

Coal is widely distributed in China and thus the mining conditions are complex and diverse. This paper summarizes the important achievements in the last 20 years in various mining methods including the extra thick seam with large mining height top coal caving, the thick seam with large mining height and top coal caving mining, the steep seam with top coal caving and fullymechanized mining ...

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Technology

Technology

Technology. We are a coal mining company with an eye on the future, combining cutting edge technologies with a diverse mix of coal products from open cut and underground mine operations. Yancoal introduced the Longwall Top Coal Caving (LTCC) mining technology to Australia at its Austar mine in 2006. Developed in China, top coal caving uses a ...

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 to supply two complete longwall top coal ...

to supply two complete longwall top coal ...

Jul 02, 2014 · The longwall top coal caving (LTCC) mining method to be employed at the Eynez East underground coal mine is a special type of longwall mining applicable to seams thicker than 6 .

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