longwall top coal caving mining

Viewpoint Mining Magazine - Longwall

Viewpoint Mining Magazine - Longwall

Longwall Top-Coal Caving: A productive and efficient alternative Longwall mining is one of the most productive ways to produce coal, but longwall mines have trouble efficiently mining seams higher than 6 m (196 ft) Longwall Top-Coal Caving can more than double the resource recovery rate of normal longwall equipment working in high seams

Peabody - North Goonyella Mine

Peabody - North Goonyella Mine

The mine, located in a remote area of Queensland, produces premium quality, medium-vol, high-strength coking coal with exceptional coking qualiti North Goonyella coal is exported through the Dalrymple Bay Coal Terminal, south of Mackay to global seabourne demand centers

Coal mining - Choosing a mining method | Britannica

Coal mining - Choosing a mining method | Britannica

Coal mining - Coal mining - Choosing a mining method: The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which method to use in extracting a coal seam depends on many ,

Longwall Top Coal Caving at the Broadmeadow Mine ,

Longwall Top Coal Caving at the Broadmeadow Mine ,

May 14, 2019· The adjacent open-cut mine has been mining the full seam section for more than 30 years, investigations and evaluations were made into the Top Coal Caving method and its suitability for the operation Longwall Top Coal Caving (LTCC) was introduced in 2012

Session Archives | Longwall USA

Session Archives | Longwall USA

Longwall Top Coal Caving at the Broadmeadow Mine By Matt Jones, longwall superintendent Broadmeadow mine, BHP Billiton Mitsubishi Alliance (BMA); Kevin Meyer, longwall maintenance superintendent, Broadmeadow mine; and Brett Moule, longwall applications, Global Mining; Overview of Current US Longwall Gateroad Support Practices

Mining Safety of Longwall Top-coal Caving in China

Mining Safety of Longwall Top-coal Caving in China

53 Mining Safety of Longwall Top-coal Caving in China Jian Wu, 1 Yueping Qin, 1 and Minghua Zhai1 1China Univ of Mining and Technology, 011# Xueyuan Road, Haidian Dist, Beijing 100083, PR of China; 2Zhangji Coal Mine, Xuzhou Mining Bureau, Xuzhou 221147, Jiangsu Province, PR of China ABSTRACT Longwall top-coal caving technology has developed rapidly in China, in recent years

(PDF) Caving mechanisms of loose top-coal in longwall top ,

(PDF) Caving mechanisms of loose top-coal in longwall top ,

A good understanding of the caving mechanisms of loose top-coal is significant for longwall top-coal caving (LTCC) mining In this paper, the equations of the particle motion, top-coal boundary .

3D numerical modeling of longwall mining with top-coal caving

3D numerical modeling of longwall mining with top-coal caving

Despite being an attractive method due to higher production efficiency and lower development require- ments, longwall mining with the top-coal-caving method imposed significant difficulties in terms of flowing characteristics of coal, timing and rate of coal drawing, loss of coal in the goaf and dilution

Coal Zoom | Longwall Top-Coal Caving: A Productive and ,

Coal Zoom | Longwall Top-Coal Caving: A Productive and ,

Dec 04, 2018· Longwall Top-Coal Caving: A Productive and Efficient Alternative December 4, 2018 - In the right conditions, longwall mining is one of the safest, most productive and most efficient ways to produce coal This is owed in part to the high degree of automation employed by modern longwall operations, which keeps shearers and roof supports advancing smoothly and people far from the ,

Longwall Mining Method and Design - 911metallurgist

Longwall Mining Method and Design - 911metallurgist

The 1991 Longwall Census from Coal Magazine shows there are 78 mines with longwall faces in the United Stat Research by the USBM indicates that 25 mines (32 pct of the total number of mines) have mining in adjacent coalbeds, either above or below

 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 ,

Long wall top coal caving - slideshare

Long wall top coal caving - slideshare

Nov 15, 2017· Long wall top coal caving 1 LONGWALL TOP COAL CAVING P SHASHIKANTH 16MT001042 2 LONGWALL TOP COAL CAVING GENERAL INFORMATION • It is the modified method of longwall mining system • Yancoal introduced the Longwall Top Coal Caving (LTCC) mining technology in Australia at its Austar mine in 2006

Roof Supports | Pennsylvania Long Wall Mining | CB Mining

Roof Supports | Pennsylvania Long Wall Mining | CB Mining

Roof supports for special applications Our Longwall Top Coal Caving (LTCC) roof supports allow mining of seams up to 10 m / 328 ft Following a conventional cut with a shearer to about 3 m / 98 ft, the roof supports move forward and allow the caving coal to fall via controllable caving shields onto a second conveyor mounted gob-side

Geotechnical Considerations for Longwall Top Coal Caving ,

Geotechnical Considerations for Longwall Top Coal Caving ,

2011 Underground Coal Operators’ Conference The AusIMM Illawarra Branch 10 – 11 February 2011 29 GEOTECHNICAL CONSIDERATIONS FOR LONGWALL TOP COAL CAVING AT AUSTAR COAL MINE Adrian Moodie1and James Anderson ABSTRACT: Austar Coal Mine has had a long association with difficult strata control conditions associated with depth of mining and a highly jointed/cleated coal ,

Application of Longwall Top Coal Caving to , - ACARP

Application of Longwall Top Coal Caving to , - ACARP

The aim of this project was to provide the Australian underground coal mining industry with an up to date, state of the art summary of the Longwall Top Coal Caving (LTCC) mining system and its potential for application in Australia

Longwall coal mining,Large angle,Steeply inclined-Beijing ,

Longwall coal mining,Large angle,Steeply inclined-Beijing ,

HOT Mining’s strategic partner, Sichuan Coal Group, and other units to solve the problem of large inclination coal seam mechanization mining, and conducted mechanization mining successfully in the working face with average coal seam angle 38° After more than 10 years research, it has developed the hydraulic support applied in the steeply-inclined coal seam, with maximum dip angle of 50°

Top Coal Caving | Longwall | underground COAL

Top Coal Caving | Longwall | underground COAL

equipment for a Longwall Top Coal Caving face Photo courtesy of Joy Manufacturing Company Pty Ltd A brief description of longwall top coal caving (LTCC) is included at the end of the Longwall section of the Fundamentals of Coal Mining module of this web site

Evaluation of Mine Scale Longwall Top Coal Caving ,

Evaluation of Mine Scale Longwall Top Coal Caving ,

assigned a uniform height of 35m and the top coal was assigned with remaining height of the coal seam The bottom part was extracted using the normal longwall extraction method The top coal was extracted in such a way that it mimics the real top coal caving mechanism, ie top coals located

longwall top coal caving mining - mine-equipments

longwall top coal caving mining - mine-equipments

Longwall Top Coal Caving | Introduction | underground COAL Longwall top coal caving (LTCC) is a special type of longwall mining applicable to very thick seams (greater than 45m) where good quality coal is being left .

 | Longwall Automation |

| Longwall Automation |

White Paper: Efficient Mining of High Longwall Seams Thru Automation of Longwall Top Coal Caving Longwall mining is an expensive undertaking – from the preparation of the site to capital investment in the equipment That is why longwall owners have high performance expectations, especially in tough economic times when commodity prices are low

Application of Longwall Top Coal Caving in Challenging ,

Application of Longwall Top Coal Caving in Challenging ,

in China carried out a series of R&D campaigns on thick seam mining techniques; a few of methods were developed mature in technology and employed in production for thick-seam deposits These methods include: Multi-Slice Longwall, High Reach Longwall (single slice) and Longwall Top Coal Caving ,

Top Coal Caving Longwall Maximizes Thick Seam Recovery

Top Coal Caving Longwall Maximizes Thick Seam Recovery

What is Longwall Top Coal Caving? Due to the inherent operational problems and high costs associated with the multi-slicing longwall method, and the legislative requirement from the central government of a 93% (minimum) recovery rate, LTCC was introduced to the Chinese coal industry in 1982 (based on the European soutirage methods)

Longwall Top Coal Caving Application Assessment in , - ACARP

Longwall Top Coal Caving Application Assessment in , - ACARP

There is an urgent need for implementation of effective thick seam extraction technologies in Australia to improve resource recovery and productivity levels in underground coal mining The Longwall Top Coal Caving (LTCC) method, which is being used successfully in China, offers a great potential for thick seam extraction in Australia

Longwall Top Coal Caving | Introduction | underground COAL

Longwall Top Coal Caving | Introduction | underground COAL

Longwall Top Coal Caving Longwall top coal caving (LTCC) is a special type of longwall mining applicable to very thick seams (greater than 45m) where good quality coal is being left because "conventional" longwall equipment has not yet been designed to operate successfully beyond around 5m mining ,

An Innovative Longwall Mining Technology in Tangshan Coal ,

An Innovative Longwall Mining Technology in Tangshan Coal ,

longwall top coal caving (CLTCC) is the main mining method throughout the country [2] However, problems such as low recovery, fire, coal bumps and bursts, wavy surface subsidence, etc, constrain

Article: Theoretical equation of initial top-coal boundary ,

Article: Theoretical equation of initial top-coal boundary ,

May 21, 2018· Abstract: The theoretical equation of initial top-coal boundary (ITCB) is one of the fundamental problems of top-coal drawing law in longwall top-coal caving (LTCC) mining The granular mechanical model of ITCB is established based on loose medium flow field theory

Longwall Top Coal Caving ~ Mining Engineering Science

Longwall Top Coal Caving ~ Mining Engineering Science

May 26, 2017· Longwall top coal caving (LTCC) is a special type of longwall mining applicable to very thick seams (greater than 45m) where good quality coal is being left because "conventional" longwall equipment has not yet been designed to operate successfully beyond around 5m mining ,

Longwall mining - Wikipedia

Longwall mining - Wikipedia

Longwall mining is a form of underground coal mining where a long wall of coal is mined in a single slice (typically 06–10 m thick) The longwall panel (the block of coal that is being mined) is typically 3–4 km long and 250–400 m wide

Overburden Failure and Ground Pressure Behaviour of ,

Overburden Failure and Ground Pressure Behaviour of ,

10 yielding, coal face spalling, strong deformations of goaf-side entry, and severe ground pressure 11 dynamic events typically occur at the longwall top coal caving longwall fac Based on the Key 12 strata theory an overburden caving model is proposed here to predict the multilayered hard strata 13 behaviour The proposed model together with .

Experimental Investigation into the Bedding Plane Slip ,

Experimental Investigation into the Bedding Plane Slip ,

Experimental Investigation into the Bedding Plane Slip Effect on the Overlying Strata Behavior in Longwall Top Coal Caving of Soft Coal Seam , J C Wang, “Engineering practice and theoretical progress of top-coal caving mining technology in China,” Journal of China Coal Society, vol 43, , pp 43–51, 2018