top coal caving mining method

Top Coal Caving Mining Method

Caving mechanisms of loose top-coal in longwall top-coal ...

The top-coal caving longwall mining is one of the major mining methods for extracting thick coal seams in China. The top-coal caving mining was estimated to have produced about 0.6 billion metric tons every year, accounts for 18% of underground coal mining in China [3].

Longwall Top Coal Caving | Introduction | underground COAL

Longwall Top Coal Caving. The method originated in Europe but has been developed in China in more recent years and is used there quite extensively and successfully. The lower section of the seam is cut by a conventional longwall set-up except that the longwall supports have a longer rear canopy extending past the base into the goaf.

The Principle of Longwall Top Coal Caving (LTCC) - YouTube

Apr 30, 2015 · Cat Longwall Top Coal Caving (LTCC) roof supports allow mining of seams seams thicker than 6 meters (20 feet).

Longwall Top Coal Caving (LTCC) Mining Technology

Above Pic ture, 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 AFC is attached to the rear of the chocks and runs directly below the canopy openings.

A new cavability assessment for Longwall Top Coal Caving ...

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 LTCCs applicability at the feasibility stage of a new mining project is therefore of importance to the effective and productive extraction of thick coal seams. The evaluation of LTCCs applicability technically refers to the assessment of top coal cavability.

(PDF) Technique of top coal caving with vibration

A fully mechanized top-coal caving mining method is a main underground coal extraction method for ultra-thick coal seams. The coal extraction technologies for coal seams less than 14 m thick were ...

Coal mining - Choosing a mining method | Britannica

Surface coal mining generally involves the following sequence of unit operations: (1) clearing the land of trees and vegetation, (2) removing and storing the top layers of the unconsolidated soil (topsoil), (3) drilling the hard strata over the coal seam, (4) fragmenting or blasting the hard strata with explosives, (5) removing the blasted material, exposing the coal seam, and cleaning the …

Fully Mechanized Longwall Coal Production - YouTube

Feb 03, 2015 · Fully mechanized Longwall Coal Production. Skip navigation Sign in. ... Caterpillar Global Mining 57,814 views. ... The Principle of Longwall Top Coal Caving (LTCC) - Duration: ...

Principles of Longwall Mining - YouTube

Apr 12, 2016 · This video provides a basic description of the long-wall mining method for extracting coal underground. It includes an explanation of the different products/key components of a long-wall mining ...

A review of cavability evaluation in longwall top coal caving

Several longwall mining methods such as Multi-Slice Longwall (MSL), High Reach Single Pass Longwall (SPL) and Longwall Top Coal Caving (LTCC) have been mainly applied to extract thick coal seams. Multi-Slice Longwall method divides a thick seam into separate slices that are extracted by a conventional longwall method.

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

The top-coal-caving method was first applied in the 1940s in Russia and then subsequently used in France, former Yugoslavia, Hungary, Romania, former Czechoslovakia and Turkey. The method has been in use in China and India since the 1980s,,. At present the method is used extensively in China and India.

Types of Underground Mining Method Comparison

Caving Methods of Mining. There are three distinctive methods of working large deposits that involve, in some way, the factor of caving. Slightly different names are in use, but those that are simple as well as descriptive are top slicing, sublevel caving, and block caving.

Mining In Minnesota - Cut and Fill Mining Method 3D Animation

Jun 23, 2016 · Mining In Minnesota - Cut and Fill Mining Method 3D Animation For more information and to request a FREE estimate, contact us today: Website: http://www.imak...

top coal caving mining method -

The fully mechanized top-coal caving mining method was used to mine the 15 m thick No. 3–5 seam at a depth of 450 m in Tongxin mine, located in the Datong area, China. The seam was overlain with strong strata that are hard to cave and four partially mined coal seams.

Longwall top coal caving mining | Zhengyang Song | 1 ...

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) …

Longwall Top Coal Caving (LTCC) technology - Yancoal

Developed in China, top coal caving uses a modified long wall mining system. LTCC allows the excavation of thick coal seams of 5 to 12 metres at one pass of the longwall machine, generating high productivity and economic returns for an operation.

Longwall Top Coal Caving Method - SlideShare

Feb 19, 2014 · LTCC • Longwall Top coal Caving (LTCC) is a method of extraction for underground mining of thick seams. • It uses a longwall set-up and natural forces to aid in the winning of coal. 4. Problems Associated With Thick Seam Extraction • Underground Coal loss.

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