Nick Ryland Barton

7 Questions 25 Answers 0 Followers

Questions related from Nick Ryland Barton

Have those who plan or analyse caving operations in mining had any success with using some selected Q-system parameters such as Jn/Jr and Ja?

I have often wondered if those who are planning or analysing potential caving operations have ever made use of / or found a use for the Q-system ratio Jn/Jr. Ja is also tied to caving potential...

12 December 2018 1,514 0 View

Does anyone know how to delete erroneously-linked-to-we, not the author or co-author Google Scholar citations, without trying to reach publishers etc?

Very frustrating to not know how to do this!

09 September 2018 9,275 1 View

CO2 sequestration, geothermal energy, nuclear waste - thermal effects modelling. If joints are involved, what about thermal over-closure effects?

In the 1980's HTM experiments in Stripa, Climax, Hanford, CSM/Terra Tek and Sandia heated block tests and Yucca Mountain, there were unexpected results caused by joint over-closure when heated....

05 May 2018 8,031 4 View

Suddenly again, a lot of literature links for spalling and fracturing around deep tunnels. Have researchers seen the recent explanation of 0.4 UCS?

Baotang Shen, the developer of FRACOD, using classic theory linking stress anisotropy and Poisson's ratio to explain exceedence of critical extension strain in a fully 3D compressive stress field,...

04 April 2018 7,109 5 View

Many articles on deformation modulus these days. Where is the emphasis that this, like P-wave velocity, is a depth- or stress-dependent property?

Possibly because of interest or project links in RG, there appear nowdays many articles from the last few years of measurements of deformation modulus at dam sites, especially from Iran and...

03 March 2018 8,364 1 View

GSI is a simplistic way to characterize, while H-B equations are software-needing complex. Shear strength is not c + sigma n tan phi anyway? So why ?

Rock masses are very complex. Is that a good reason to use something that is so simplistic (GSI) with a numerical range of only 5 to 90? And then combine this with non-empirical equations needing...

11 November 2017 9,213 3 View

Does anyone have examples of sub-horizontal hydraulic fractures, sometimes with gravel, sand, as a result of ice-sheet melt?

With water pressure from melting surface water sometimes exceeding the vertical ice load of 1 or 2 km, sub-horizontal hydraulic fractures are sometimes (often?) found some 10's of meters below...

11 November 2017 3,558 1 View