Mahmoud
I would concur with what Steve said yesterday. Various geophysical can provide "targets" that will require proving by drilling. We have found that the best and most successful method of locating them is to carry out very thorough desk studies and then provide a series of "best fit" positions which can be then targeted by either geophysics or directly by drilling. Local information and experience can also help great deal.
Another potential method that I do not think that Steve mentioned could be the use of cross hole seismics. This method may be of use in situation where shafts exist and direct access is impossible eg under live railway embankments.
Does anybody on the list have any experience of utilising this method to find such targets especially in difficult access situations.
Simon Croxford
Engineering Geologist
IMC Consulting Engineers
PO Box 18
Common Road
Sutton in Ashfield
Nottinghamshire
NG17 2NS
Tel 01623 441444
Fax 01623 440021
e mail : [log in to unmask]
web : www.imcgroup.co.uk
>>> Mahmoud I Alsayed <[log in to unmask]> 12/03/02 17:31:25 >>>
Dear all,
We are investigation several sites to locate old mineshafts. The mining
information available confirms the existence of the shafts but the exact
location, method of treatment on abandonment and current condition are
unkown. To complicate matters, some of the sites have been landscaped and
in some cases the original ground surface is situated below railway
embankments up to 8m high. We are considering using a combination of
intrusive ground investigation and geophysical techniques but are not sure
of how successful we will be.
If you have been involved in this type of work and would like to share
your experiences (good or bad) then please let me know.I would appreciate
any comments you may have.
Regards,
Mahmoud I Alsayed
First Consulting, Quay Road, Rutherglen, Glasgow G73 1LD, UK
Tel. +44 (0)141 335 5300
Fax +44 (0) 141 335 5301
Email [log in to unmask]
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