Let Geoinvestigate quote for your next coal mining risk assessment (CMRA), coal mining investigation desk study, ground investigation, site investigation, geotechnical, geo-environmental or contaminated land investigation in Airdrie, Wishaw and Cumbernauld. With over 18 years in the business, several regional offices offering a nationwide service, highly qualified and experienced professional staff, and its own drilling equipment, Geoinvestigate is best placed to give the most competitive and professional coal mining investigation service in Airdrie, Wishaw and Cumbernauld..
Geoinvestigate’s coal mining risk assessment unravels the complexity of Scotlands coal mining legacy
HALF of Scotland’s largest city is affected by disused mine workings that have been left over from its industrial past, say geologists. A survey commissioned by Glasgow City Council, which has embarked on a major project to fill in the disused shafts, has mapped out the extent to which areas of the city are undermined. Residents of Jordanhill, one of the city’s most desirable neighbourhoods, were told it will cost up to £5000 each to pay for mines that crisscross the area to be filled in.
“Half the city is undermined by some form of mine or other. Mining in the city was mostly for coal and ironstone, although it was also done for limestone and sandstone, materials you would normally quarry. Many of the communities that came to make up the greater Glasgow area grew up independently around mines that were later swallowed up by the city’s urban sprawl. Much of the eastern conurbation is undermined by mines, and there are pockets in the south and west of the city. The mines vary from being very shallow to extending 250 to 300 metres below the ground”.
Over the past 5 months Geoinvestigate’s new compact microdrill system has proven its worth and that it’s just the answer for investigating Uddingston’s and Edinburghs coal mining legacy. Microdrill offers restricted access, small diameter rotary open-hole drilling which is first and foremost SAFE, fast, clean, quiet, cost effective and environmentally friendly. New Microdrill has been designed for probing for shallow workings in limestone, sandstone and coal as well as locating mine shafts and sinkholes.
Recently Microdrill was in action in Newcastle on the Northumberland Coalfield. Having previously obtained a coal drilling permit from the Coal Authority to drill with water flush Microdrill was delivered to site on the back of a standard flatbed trailer.
Shallow mine working investigation of a housing estate in Newcastle
Access to the drilling positions in several gardens was tricky but achievable with Microdrill.
In accordance with Coal Authority Guidance on Managing the Risk of Hazardous Gases when Drilling or Piling Near Coal (essentially a Code of practice for safe drilling and piling through coal) water flush was in this instance considered to be the safest flushing medium. This is because there was assessed to be an unknown or undetermined gas risk as is so often the case in exploratory drilling works on the UK coalfields.
Hazards to development on coalfields from shallow mine workings, gas, fissures and shafts and adits
The Coal Authority normally stipulates small volume water injection flush for their internally managed exploratory drilling works because it ensures minimal risk to the public from hazardous gases including carbon dioxide, methane and carbon monoxide. In fact it is rare under the Coal Authorities strict safety policy for drilling through coal for them to permit anything else but water.
Probing for shallow mine workings and coal in Newcastle on the Durham and Northumberland Coalfields
The Coal Authorities strict policy with regard to water flush is something to be considered by site investigation companies when compiling a Coal Mining Risk Assessment (CMRA) or drawing-up a source-pathway-receptor based risk assessment for drilling permit application.
Geoinvestigate’s small volume water injection Microdrilling system is safest for investigation mining
It should also be borne in mind by drilling contractors and consultants that the CA polices drill sites checking some 10% of drill sites per year to ensure compliance with the permit. A change in drill flush from that originally agreed with the CA would be a breach of terms and conditions and could result in prosecution.
New Microdrill has been demoed to the CA who gave it their nod of approval suggesting that in their opinion it was easily capable of reaching 50m and much deeper though up till now it has only been tested to 30m which is typically the limit for shallow mining investigation.
Coal at 11m depth turns drill water black indicating the seam is intact and the ground is stable
Geoinvestigate carrying out a contaminated land site investigation and gas survey in Hartlepool
If you require a coal mining investigation, Phase 1 desk study, coal mining risk assessment (CMRA), Phase 2 intrusive site investigation, geotechnical investigation, ground investigation or you need a contaminated land survey or landfill gas survey, trial pitting or borehole drilling please do not hesitate to contact one of our regional offices. Our team are only too happy to assist with your enquiry and will ensure that you get our most competitive quote.