Number of the records: 1

Monitoring of coal pillars yielding during room and pillar extraction at the great depth

SYSNO ASEP	0491705
Document Type	C - Proceedings Paper (int. conf.)
R&D Document Type	Conference Paper
Title	Monitoring of coal pillars yielding during room and pillar extraction at the great depth
Author(s)	Waclawik, Petr (UGN-S)_RID Kukutsch, Radovan (UGN-S)_{RID, ORCID} Koníček, Petr (UGN-S)_{RID, ORCID} Kajzar, Vlastimil (UGN-S)_{RID, ORCID}
Number of authors	4
Source Title	EUROCK 2018 - Geomechanics and Geodynamics of Rock Masses, Selected Papers from the 2018 European Rock Mechanics Symposium. - London : CRC Press/Balkema, Taylor and Francis Group, 2018 / Litvienko V. - ISBN 978-113861645-5
Pages	s. 711-718
Number of pages	6 s.
Publication form	Online - E
Action	EUROCK 2018 - Geomechanics and Geodynamics of Rock Masses
Event date	22.05.2018 - 26.05.2018
VEvent location	Saint Petersburg
Country	RU - Russian Federation
Event type	WRD
Language	eng - English
Country	GB - United Kingdom
Keywords	stress-deformation ; monitoring ; room and pillar ; coal pillar ; yielding ; displacement
Subject RIV	DH - Mining, incl. Coal Mining
OECD category	Mining and mineral processing
R&D Projects	ED2.1.00/03.0082 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	LO1406 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	UGN-S - RVO:68145535
UT WOS	000570546600097
EID SCOPUS	85061356865
Annotation	A considerable amount of coal reserves are located in protection pillars that lie under built-up region in active mining areas at the Czech part of the Upper Silesian Coal Basin. The commonly used controlled caving longwall mining method is not applicable in these areas because significant deformation of the surface is not permitted. For this reason the room and pillar method with stable coal pillars has been tested in order to minimise subsidence of surface. Stress-deformation monitoring was essential as this was the first application of the conventional room and pillar mining method within the Upper Silesian Coal Basin mines. More than six kilometres of roadways were driven within two panels during last three years. To determine pillar stability, vertical stress and horizontal displacement of coal pillars were measured in coal pillars which are located within a row of pillars forming the panels. Two monitored pillars diamond in shape and slightly irregular sides have been observed into the first mined panel “V” and three monitored pillars have been observed into the second panel “II”. To measure the increase in vertical stress due to mining, hydraulic stress cells were installed in each coal pillar. The 5-level multipoint rib extensometers measured displacements of all sides within each monitored pillar. The results of stress-deformation monitoring allowed pillar loading and yielding characteristics to be described.
Workplace	Institute of Geonics
Contact	Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354
Year of Publishing	2019
Electronic address	https://onepetro.org/ISRMEUROCK/proceedings-abstract/EUROCK18/All-EUROCK18/ISRM-EUROCK-2018-097/448923

Number of the records: 1