Энэтхэгт Longwall Top Caving Coal Mining Technology

MINERAL MINING TECHNOLOGY Prefeasibility …

Abstract—Longwall Top Coal Caving (LTCC), a relatively newer technology in India, is an underground mining method developed for thick seam extraction. Various factors and systematic approaches ...

Critical Aspects of Longwall Top Coal Caving Method for

Wu J, Qin Y, Zhai M (1999) Mining safety of longwall top-coal caving in China. In: The 8th US mine ventilation symposium. Google Scholar Wang J, Yu B, Kang H, Wang G, Mao D, Liang Y, Jiang P (2015) Key technologies and equipment for a fully mechanized top-coal caving operation with a large mining height at ultra-thick coal …

Fully mechanized longwall top coal caving technology in …

Coal science and technology. The paper systematically summarized the main achievements of the fully mechanized longwall top-coal caving technology in passed 20 years in …

A novel non‐pillar coal mining technology in longwall top coal caving

In longwall top coal caving (LTCC) mining methods, problems such as large deformations, loss of coal resources, and excavation relay out of balance are often encountered with the increased production in single mining panels. To address these problems, a novel non‐pillar coal mining technology in LTCC was used based on the …

A Coal Burst Mitigation Strategy for Tailgate during Deep Mining …

A coal burst mitigation strategy for tailgate in mining of deep inclined longwall panels with top coal caving at Huafeng Coal Mine is presented in this paper. Field data showed that coal bursts, rib sloughing or slabbing, large convergence, and so forth frequently occurred within the tailgate entries during development and panel retreating employing …

A new cavability assessment for Longwall Top Coal Caving …

1. Introduction. Longwall Top Coal Caving (LTCC) can provide substantially less economic sensitivity and a reduced level of technical risk over other thick seam mining methods. 1 A reliable evaluation of LTCC's applicability at the feasibility stage of a new mining project is therefore of importance to the effective and productive extraction of …

Longwall Top Coal Caving (LTCC) Mining …

Above Pic, A typical mining planning of longwall top coal caving method. Coal Seam Thickness 4.5-7 Meters; Phase 3rd 6.5-7 Meters. Depth of Coal 400-700 Meters; currently, the mining depth is 530 Meters. An additional …

A novel non‐pillar coal mining technology in longwall top …

Energy Science & Engineering. IN THE FIELD. Open Access. A novel non-pillar coal mining technology in longwall top coal caving: A case study. Haosen …

Prevention of water and mud inrush in longwall top coal cave mining …

During longwall top coal caving mining of shallow buried thin bedrock and thick coal seams, penetrating fractures may form in the rock strata above the roof, causing an inrush of water and sand at the working face. The 507-working face of the Madiliang Coal Mine in Inner Mongolia, China, is a shallow buried thin bedrock and thick coal seam, …

Monitoring strata behavior due to multi-slicing top coal caving

However, there has been a complete lack of research on monitoring the strata behavior due to multi-slicing top coal caving longwall mining in steeply dipping extra thick coal seam. Therefore the strata behavior of multi-slicing panels 37220-1 and 37220-2 was systematically investigated in this research.

Longwall Top Coal Caving Mechanisms in the Fractured

In recent years, longwall top-coal caving (LTCC) has been widely used for mining thick coal seams with various complicated conditions (Alehossein and Poulsen 2010;Le et al. 2017;Wang 2009). In ...

Longwall Top Coal Caving at the Broadmeadow Mine

The Goonyella Middle Seam, located in the Bowen Basin, Queensland, Australia, is a source of high quality metallurgical coal for global export. The seam sub-crops in a north/south direction at a depth of about 60 m (200 ft) and dips to the east at 5°-8°. Seam thickness varies from 5 m (16 ft) to 12 m (39 ft) with the average seam thickness in ...

A new cavability assessment criterion for Longwall Top Coal Caving

Longwall Top Coal Caving (LTCC) is a modified longwall mining method for efficient extraction of the thick coal seams. The major difference between LTCC and the traditional longwall method is the extraction of the caved coal from behind the shields as well as the sheared face (Fig. 1).The method has been widely implemented by the …

Longwall top coal caving (LTCC) mining technologies with …

The paper discusses advanced top coal caving technologies for thick coal seams and addresses some issues of incomplete coal extraction, which can result in the …

Engineering practice and theoretical progress of top-coal caving mining

To explore a realistic top coal caving interval of the longwall top coal caving working face, longwall top coal caving panel 8202 in the Tongxin Coal Mine is used as an example, and 30 numerical ...

Investigation on the potential hazard zone of gas …

Investigation on the potential hazard zone of gas explosion in the goaf under longwall top caving coal mining condition Pengfei Zhu a Key Laboratory of Gas and Fire Control for Coal Mines of Ministry of Education, China …

Latest Developments in Longwall Mining Technology

2015 MINING.CA T 6 Roof Support Technology Since 2006, has specialized in designing and supplying special shields for the longwall top coal caving method (LTCC), where extremely thick seams are being mined. This method utilizes a second AFC behind the shields to take the coal on top of the longwall outside of the face.

Optimization of Caving Technology in an Extrathick Seam …

Optimization of Caving Technology in an Extrathick Seam with Longwall Top Coal Caving Mining. Liu Yang, 1,2Lianghui Li, 1,2and Weijie Wei 1,2. Show more. …

A review of cavability evaluation in longwall top coal caving

Longwall Top Coal Caving was initially developed in the former Soviet Union and France in the 1950s and 1960s. It was then applied in the former Yugoslavia, Hungary, Romania, the former Czechoslovakia and Turkey [4], [5], [6].The 'Soutirage' method which was developed in France in the 1960s is considered as the original form of LTCC [7].The …

(PDF) Thick Coal Seam Mining

Along with it, a prospect of thick seam mining by mechanized longwall and its variants like Longwall Top Coal Caving (LTCC), Sub-Level Caving, etc. is proposed as a future thick seam mining method ...

Theoretical investigation and key caving technology

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WebIn longwall top coal caving (LTCC) mining methods, problems such as large deformations, loss of coal resources, and excavation relay out of balance are often …

Mining New South Wales: climate change, coal and opportunity

New South Wales is one of Australia's top three mining states, contributing around A$1.8bn in annual royalties and employing over 40,000 people. Yet, amid growing concerns around the environment and climate change, the hugely coal-focused sector faces huge environmental and regulatory challenges going forward. Heidi Vella January 15, 2020.

Theoretical description of drawing body shape in an inclined …

Understanding the characteristics of drawing body shape is essential for optimization of drawing parameters in longwall top coal caving mining. In this study, both physical experiments and theoretical analysis are employed to investigate these characteristics and derive a theoretical equation for the drawing body shape along the …

(PDF) Longwall top coal caving (LTCC) mining …

Using hydraulic fracturing for cutting roof pressure is a critical technology to protect coal pillars. In this paper, based on the engineering background of 18506 working face in the Xiqu Coal ...