... percent of the bolts in the powerhouse are reported to have failed and the walls of the cavern are continuing to converge, albeit at a slow rate since its completion in 2008. Plans are underway to stabilize this important underground structure. The cavern is located in the complex geological conditions...

...Rock Characterisation, Modelling and Engineering Design Methods Feng, Hudson & Tan (Eds) © 2013 Taylor & Francis Group, London, ISBN 978-1-138-00057-5 Determination of the deformation behaviour of salt rock by evaluation of convergence measurements in shafts Qianyun Wang & Jürgen Hesser Federal...

... pillar, and the maximum surround- ing coal-rock convergence to the amount of 167.4 mm of retained roadway roof and floor; Figure 2b & 3b illustrates the maximum vertical stress 27.51 MPa of 20 meters coal pillar, and the maximum surround- ing coal-rock convergence to the amount of 124.3 mm of retained...

... location results with three methods are proposed and their calculation abilities are compared. The results show that computational accuracy of the second method is influenced by initial value and the third method has the global convergence; At last, the last two methods together are adopted for source...

... conducted. This paper summarizes field measurement results and their interpretation, and proposes a continuous method for the stability evolution of caverns for underground powerhouses under operation. displacement convergence underground powerhouse continuous management method management...