My Bonsall spar mining friend (now retired) who worked opencast sites in the Peak District of Derbyshire for most of his working life (approximately 55 years) to extract the remaining minerals (such as barytes - also known as caulk - fluorspar, zinc blende, calcite etc.,) left behind by "t'owd man" in the vein, or in the spoil heaps left on the surface of many old disused lead mines - which because of the laws of the Barmote Courts could not be sold by the lead miners, these minerals either belonged to the land owner or the mineral rights owner, and had to be left behind, either below ground in the mine (often stacked away as "deads") or left on the surface in the form of spoil heaps - always referred to his work as "opencasting", never quarrying or mining.
At the end of his working life he was working on the Rakes just south of Castleton and the Eldon Hole area, especially on Moss Rake, where at the insistence of the Peak Park Planning Board he drove a level underground along the floor of the Rake to extract the vein, he then said he was "mining", this was sometime in the late 1980's and I have a photograph of this level, now long since destroyed, which I must put up on AN. After this trial level, the Peak Park Planning Board allowed him to continue opencasting on the vein in the Rake without having to mine underground again. Other areas he opencasted at were Lowe Mine, Bonsall; Jugholes; Tearsall; Matlock Bath; Bonsall Moor (where you can still see the remains of an opencast working to the east of Lees Lane which he and his partners worked), etc. He and his fellow spar miners always referred to their work as "opencasting" or "sparring", never mining or quarrying. At one time he worked extracting fluorspar and other minerals in Hanging Flats mine, Stoney Middleton and he then described his work as "mining".
Arthur H. Stokes, F.G.S who was H.M. Inspector of Mines for the Midland District from 1887 to 1909, and one of the first members of the Midland Counties Institution of Engineers, wrote "Lead and Lead Mining in Derbyshire" being a very detailed account of the Derbyshire lead mining industry, it consists of a collection of papers that Mr. Stokes wrote and presented to the Institution between 1880 and 1883. It has been published by Peak District Mines Historical Society in 1963, republished by PDMHS in 1973 and again in 1996. It is a source of great information and details in depth the lead mining laws, it's courts (the Barmotes), methods of workings, etc. etc. I quote below part of Mr. Stokes description of a Lead Rake (please take into account the date this information was written):-
"RAKE VEINS - Rake veins are those fissures and crevices that are generally vertical, or highly inclined, and run through a series of rocks, or beds of limestone. The depth to which these fissures contain ore, is altogether uncertain. Not unfrequently, the width of the rake vein is increased by parallel fissures, filled with mineral, and separated by only thin partitions of rock. The sides of the clefts, or chasms, forming the rake vein, are commonly lined with calcareous spar, fluorspar, or barytes, termed by the miners vein stuff; and between, or against this mineral lies the ore filling up the spaces, and called by the miners ribs of ore. The direction of these rake veins is not quite straight, and they are very irregular in width. At points they are intersected by strings of ore branching off at an angle, and called by the miners, scrins. The junction of a scrin to the rake vein, is often a profitable work for the miner, and even the scrins are followed up as long as they are found lucrative. A scrin may be called a small rake, and contains all the essential features of a rake vein except that it is often very small and contains very little ore".
Nellie Kirkham told me that mostly lead rakes lie in an east/west direction. For further reading I would suggest "The Lead Legacy - The Prospects for the Peak District's Lead Mining Heritage" by John Barnett and Rebecca Penny published 2004 by the Peak District National Park Authority.
Whilst I was working a "temp" wages clerk for Coal Contractors in the mid/late 1980's, they held an Open Day at their enormous opencast coal site at Staveley, N. Derbyshire. A friend and I went as we were curious, and were driven to the bottom of this very large hole in a Land Rover, it was very interesting and revealing, but this was neither a quarry or a mine, but an opencast.