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Long-hole destress blasting for rockburst control during deep underground coal mining

SYSNO ASEP	0394628
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Long-hole destress blasting for rockburst control during deep underground coal mining
Author(s)	Koníček, Petr (UGN-S)_{RID, ORCID} Souček, Kamil (UGN-S)_{RID, ORCID} Staš, Lubomír (UGN-S)_{RID, ORCID} Singh, R. (IN)
Number of authors	4
Source Title	International Journal of Rock Mechanics and Mining Sciences. - : Elsevier - ISSN 1365-1609 -, č. 61 (2013), s. 141-153
Number of pages	13 s.
Publication form	Online - E
Language	eng - English
Country	GB - United Kingdom
Keywords	Ostrava - Karvina Coal basin ; longwall mining ; rockbursts ; destress blasting
Subject RIV	DH - Mining, incl. Coal Mining
R&D Projects	ED2.1.00/03.0082 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	UGN-S - RVO:68145535
UT WOS	000320494600012
DOI	10.1016/j.ijrmms.2013.02.001
Annotation	The Lazy Colliery in the Ostrava–Karvina Coalfield of the Upper Silesian Coal Basin adopted modern longwall technology for an underground extraction of coal seam No. 504. This coal seam is located at a cover depth of around 700 m. The seam thickness varied from 3.1 m to 5.0 m in the selected longwall panel. Two overlying coal seams, Nos. 512 and 530 experienced mining at average heights of 58 m and 75 m, respectively, from the planned working horizon of the seam No. 504. The proposed longwall panel was adversely situated below goaf edges of the workings in these two overlying extracted seams. An analysis of the inter-burden rock mass among these coal seams showed the presence of strong, massive strata of sandstones and conglomerates with uniaxial compressive strength values between 70 MPa and 120 MPa. The stress is measured at different mining stages by Compact Conical-ended Borehole Monitoring (CCBM). A simple laboratory test of the coal sample found a high value of the ratio of the elastic deformation to the total deformation (>0.8), indicating the energy-storing characteristic (prone to burst/bump) of the coal seam.
Workplace	Institute of Geonics
Contact	Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354
Year of Publishing	2014

Number of the records: 1