Convergence monitoring as a basis for numerical analysis of changes of rock-mass quality and Hoek-Brown failure criterion parameters due to longwall excavation

• Published in: Archives of mining sciences = Archiwum górnictwa Vol. 64; no. 1; p. 93
• Main Authors: Małkowski, Piotr, Ostrowski, Łukasz
• Format: Journal Article
• Language: English
• Published: Warsaw Polish Academy of Sciences 01.01.2019
• Subjects: Coal; Coal mines; Constants; Convergence; Criteria; Distance; Dredging; Empirical analysis; Excavation; Exploitation; Failure analysis; Heaving; Monitoring; Numerical analysis; Parameters; Rock mass rating; Rocks; Sandstone; Sedimentary rocks; Shale; Shales

In the longwall exploitation system, the main gates are subject of the most intensive movements of the rock mass, where the proximity of the excavation front is a key factor. The paper presents the results of a research on the constants mb and s of Hoek-Brown failure criterion for the rocks surround...