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Seams strange


The saga regarding mining under the M6 (NCE 7 March) seems strange. Was there no way of securing access to the remainder of the seam other than to mine a heading right across the M6? And no other way for this short length of ensuring permanent support instead of allowing subsidence to occur?

I recollect a discussion when a mining engineer was bragging about the amount of 'tunnelling' they carry out relative to civil engineers - and reminded that most of them are allowed to collapse shortly after excavation!

John Eric Gray, Warwickshire, jericgray@hotmail. com

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