International Mining Forum (IMF 2010 E-BOOK)

Huainan,China,9.19-9.22,2010

ISBN: 978-1-935068-25-9 Scientific Research Publishing, USA

E-Book 246pp Pub. Date: September 2010

Category: Engineering

Price: $80

Title: Roof Rupture Analysis of Stope Drift in Soft Thick Seam with a Large Angle
Source: International Mining Forum (IMF 2010 E-BOOK) (pp 100-105)
Author(s): Dong-ming Guo, State Key Laboratory for Geomechanics & Deep Underground Engineering
Ren-shu Yang, State Key Laboratory for Geomechanics & Deep Underground Engineering;School of Mechanics and Civil engineering in China University of Mining and Technology
Guo-dong Wang, State Key Laboratory for Geomechanics & Deep Underground Engineering
Xian-lei Zhu, State Key Laboratory for Geomechanics & Deep Underground Engineering
Peng-fei Han, State Key Laboratory for Geomechanics & Deep Underground Engineering
Yan-li Zhu, School of Mechanics and Civil engineering in China University of Mining and Technology
Abstract: Described stope drift’s roof rupture characteristics in soft thick seam with a large angle.Withknowledge of structural mechanics, mechanical analysis of the roof found that the lower side of the roof areabear the largest moment and probably to be the starting point of the roof rupture; the support force change ofthe lower side coal face has a significant influence on the roof stress state. Software simulation of tunnel deformationand failure characteristics using FALC3D shows that both area and extent of roof damage of thelower side is much greater than that of the higher side; both sides’ support to the roof plays an important role,large deformation of either side is the main induced factor of roof rupture especially the lower side’s; to expandthe drift has obvious disturbance on the roof, which will lead to the recurrence of plastic roof damage.Analyses the actual roof damage induced factors according to the actual situation on-site: soft coal, seriousexpansion and undercover, water spray, geological structure, poor quality of construction and mining impactand put forward corresponding countermeasures.
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