Underground mining of thick coal seams
IR@CIMFR: CSIR-Central Institute of Mining and Fuel Research, Dhanbad
View Archive Info| Field | Value | |
| Title |
Underground mining of thick coal seams
|
|
| Creator |
Kumar, Rakesh
Singh, Arun Kumar Singh, Rajendra |
|
| Subject |
Thick Seam Mining
|
|
| Description |
This paper reviews underground mining methods for total thickness of a thick coal seam in single lift (TTTCSSL). Review shows the required engineering for extraction of thick seams needs to be fitted with thickness of the seam, behavior of rock-mass and surrounding stress conditions for efficient mining. Variants of TTTCSSL are able to extract a maximum 10–12 m thickness only. An improvement in bending moment of the overlying coal band in longwall top coal caving (LTCC) provides better under-winning opportunity for the roof coal band. An acceptable limit of 25 MPa compressive strength of coal for the success of LTCC may be increased under favorable geo-technical conditions. Bord and pillar in India adopted induced caving of roof coal band for single lift depillaring of total thickness (SLDTT) of a competent thick coal seam developed along floor. Case studies are given to arrest the adverse effects of extraction height on pillars.
|
|
| Publisher |
Elsevier
|
|
| Date |
2015-11
|
|
| Type |
Article
PeerReviewed |
|
| Identifier |
Kumar, Rakesh and Singh, Arun Kumar and Singh, Rajendra (2015) Underground mining of thick coal seams. International Journal of Mining Science and Technology, 25 (6). pp. 885-896. ISSN 2095-2686
|
|
| Relation |
http://cimfr.csircentral.net/1551/
|
|