MyJournals Home  

RSS FeedsSustainability, Vol. 12, Pages 2885: Failure Mechanisms of Rheological Coal Roadway (Sustainability)

 
 

4 april 2020 16:02:38

 
Sustainability, Vol. 12, Pages 2885: Failure Mechanisms of Rheological Coal Roadway (Sustainability)
 


The roadway instability in deep underground conditions has attracted constant concerns in recent years, as it seriously affects the efficiency of coal mining and the safety of personnel. The large rheological deformations normally occur in deep roadway with soft coal mass. However, the failure mechanism of such roadways is still not clear. In this study, based on a typical soft coal roadway in the field, the in-situ measurements and rock mass properties were obtained. The rheological deformation of that roadway was revealed. Then a time-dependent 3D numerical model was established and verified. Based on the verified model, the deformation properties and evolutionary failure mechanism of deep coal roadway were investigated in detail. The results showed that the deformation of the soft coal roadway demonstrated rheological behavior and the applied support structures failed completely. After roadway excavation, the maximum and minimum stresses around the roadway deteriorated gradually with the increase of time. The failure zones in soft coal mass expanded increasingly over time, which had a negative effect on roadway stability in the long-term. According to the findings, helpful suggestions were further presented to control the rheological deformation in the roadway. This research systematically reveals the instability mechanism of the deep coal roadway and provides some strategies for maintaining roadway stability, which can significantly promote the sustainability of mining in deep underground coal mines.


 
47 viewsCategory: Ecology
 
Sustainability, Vol. 12, Pages 2886: An AHP-SWOT-Fuzzy TOPSIS Approach for Achieving a Cross-Border RES Cooperation (Sustainability)
Sustainability, Vol. 12, Pages 2884: Innovation Diffusion of Mobile Applications in Social Networks: A Multi-Agent System (Sustainability)
 
 
blog comments powered by Disqus


MyJournals.org
The latest issues of all your favorite science journals on one page

Username:
Password:

Register | Retrieve

Search:

Ecology


Copyright © 2008 - 2020 Indigonet Services B.V.. Contact: Tim Hulsen. Read here our privacy notice.
Other websites of Indigonet Services B.V.: Nieuws Vacatures News Tweets Nachrichten