EP 2801697 B1 20190814 - LONGWALL WORKING FACE, NON-PILLARED MINING METHOD
Title (en)
LONGWALL WORKING FACE, NON-PILLARED MINING METHOD
Title (de)
NICHT SÄULENFÖRMIGES ABBAUVERFAHREN MIT LANGWANDIGER ARBEITSFLÄCHE
Title (fr)
PROCÉDÉ D'EXPLOITATION MINIÈRE SANS PILIER, À FACE D'EXPLOITATION PAR LONGUE TAILLE
Publication
Application
Priority
CN 2012070109 W 20120106
Abstract (en)
[origin: EP2801697A1] Disclosed is a longwall working face, non-pillared mining method, comprising the following steps: 1. Excavating a tailentry (2) and a headentry (3); 2. Reinforcing a top panel (5) of the tailentry (3) and drilling on the top panel an energy collecting hole (7) for pre-splitting blasting; 3. Extracting until a goaf is formed; 4. Blasting at a position corresponding to the energy collecting hole and forming a kerf on the top panel; 5. The mining face collapsing to become a new roadway; 6. Taking the original headentry as the tailentry of the next mining face, and excavating a headentry relative to the tailentry, to form a new mining face; and 7. Repeating steps 2-6, and continuing to mine coal until the coal seam mining is completed. The present method involves continuity between every two mining faces, non-pillared support, a short process for forming roadways, and high efficiency of mining and forming roadways.
IPC 8 full level
E21C 41/16 (2006.01); E21C 41/18 (2006.01)
CPC (source: EP)
E21C 41/18 (2013.01)
Citation (examination)
- ZHANG GUO-FENG ET AL: "Research on the Technology of No-Pillar Mining with Gob-Side Entry Formed by Roof cutting in the Protective Seam in Baijao Coal Mine (Translation in English)", JOURNAL OF MINING & SAFETY ENGINEERING, vol. 28, 17 January 2011 (2011-01-17), XP055410365
- NONG ZHANG ET AL: "Stability and deformation of surrounding rock in pillarless gob-side entry retaining", SAFETY SCIENCE, vol. 50, no. 4, 2 October 2011 (2011-10-02), AMSTERDAM, NL, pages 593 - 599, XP055410371, ISSN: 0925-7535, DOI: 10.1016/j.ssci.2011.09.010
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2801697 A1 20141112; EP 2801697 A4 20151223; EP 2801697 B1 20190814; PL 2801697 T3 20200615; WO 2013102309 A1 20130711
DOCDB simple family (application)
EP 12864300 A 20120106; CN 2012070109 W 20120106; PL 12864300 T 20120106