Longwall Top Coal Caving Mining

Longwall Top Coal Caving LTCC is a special designed longwall mining methodfor very thick seams thickness is than 4 5m where good quality coal is being left because conventiona l longwall equipment has not yet been designed to operate successfully beyond around 5m mining height It enables an increased recovery for only an incremental

A 3D particle based numerical approach to simulate the longwall top coal caving LTCC process was proposed which for the first time the effect of continuous support advance and the face end

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

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

Longwall Top Coal Caving LTCC is a special designed longwall mining method for very thick seams thickness is than 4 5m where good quality coal is being left because conventional longwall equipment has not yet been designed to operate successfully beyond around 5m mining height

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 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

May 14 2019 The adjacent open cut mine has been mining the full seam section for 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

Longwall Top Coal Caving LTCC technology 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 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

Longwall top coal caving mining technolog y Jiachen Wang Jinwang Zhang Zhengyang Song and Zhaolong Li China University of Mining and Technology investigate the loose top coal drawing

Longwall coal mines prove that longwall mining is considered to be the best coal mining pr actice due to vast recovery of coal ove r other forms of underground as well as open cast mining methods

Longwall top coal caving LTCC is a special type of longwall mining applicable to very thick seams greater than 4 5m where good quality coal is being left because conventional longwall equipment has not yet been designed to operate successfully beyond around 5m mining height It enables an increased recovery for only an incremental additional cost

The method employs both coal cutting of the lower portion of the coal seam accompanied by caving and reclamation of the top coal Coal is first cut from the longwall face using a conventional shearer and AFC arrangement working under hydraulic face supports that incorporate a rear coal conveyor and cantilever flipper arrangement

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 Despite the fact that there are numerous coal seams in Australia which are thick enough for LTCC to be used to increase recoveries potentially at a reduced costtonne there has been little application of the process to date

Figure 3 Longwall top coal caving system GEOTECHNICAL CONSIDERATIONS FOR LONGWALL TOP COAL CAVING Development and installation roadways The development process at Austar is no different to that of a traditional longwall mining operation The normal development roadway dimensions are 5 2 m wide x 3 2 m high these dimensions are at the

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

Underground coal production at GLE Turkey was originally won from conventional longwall mining drill and blast and recently from the innovative use of the mechanised longwall top coal caving method This latter method was introduced to gain maximum tonnage from the extraction of an 8 m lignite coal seam under very difficult mining

2Zhangji Coal Mine Xuzhou Mining Bureau Xuzhou 221147 Jiangsu Province P R of China ABSTRACT Longwall top coal caving technology has developed rapidly in China in recent years The application of longwall top coal caving can double both the productivity and the efficiency of a working face and reduce the cost of production by 30 to 40oo

Articleosti20020940 title Mining safety of longwall top coal caving in China author Wu J and Qin Y and Zhai M abstractNote Longwall top coal caving technology has developed rapidly in China in recent years The application of longwall top coal caving can double both the productivity and the efficiency of a working face and reduce the cost of production by 30 to 50

Oct 01 2014 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

Oct 01 2014 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 The major features of the top coal caving mining are that a conventional longwall mining with cutting height 23 m is

04 LONGWALL MINING IN WATER CATCHMENTS 17 05 OTHER EMERGING THREATS 19 5 1 Longwall Mining near National Parks 19 5 2 Longwall Mining under the Liverpool Plains 19 5 3 Longwall Top Coal Caving 20 06 REMEDIATION amp MONITORING 21 6 1 Avoidance 21 6 2 Amelioration 22 6 3 Rehabilitation 22 6 4 Monitoring 23 07 KEY ISSUES AND RECOMMENDATIONS 24

In coal mining Longwall mining In the longwall mining method mine development is carried out in such a manner that large blocks of coal usually 100 to 300 metres wide and 1 000 to 3 000 metres long are available for complete extraction see photograph A block of coal

Oct 24 2013 Ultra thick Seam Longwall Mining in China Oct 24 2013 Feature Articles Ultra thick seams in this article refer to those equal to or greater than 6 m 20 ft thick but the majority are seams that are 7 m 23 ft thick For seams that are this thick there are two major mining methods one is top coal caving that was first adopted in the 1980s while the other is the ultra thick whole seam one slice

May 05 2020 The first caving of top coal and the first weighting of roof strata in Longwall Top Coal Caving LTCC mining were analyzed in a parametric study by using a discontinuum modeling technique with plastic rock material The analysis demonstrated that an increase in the value of cover depth decreases the stability of main roof strata while the impact of horizontal stress on the main roof strata

The Principle of Longwall Top Coal Caving LTCC Caterpillar has extensive experience in the design of roof supports for specific mining conditions Cat Longwall Top Coal Caving LTCC roof supports allow m