000 02116nam  2200313za 4500
0019.841728
003CaOODSP
00520221107152146
007cr |||||||||||
008170816s1974    oncabd  ob   f000 0 eng d
040 |aCaOODSP|beng
043 |an-cn---|ae-fr---
0861 |aM34-20/189E-PDF|zM34-20/189
1001 |aBarron, K.
24514|aThe mining of thick, flat coal seams by a longwall bottom slice with caving and drawing |h[electronic resource] / |cK. Barron, Mining Research Centre.
260 |aOttawa : |bInformation Canada, |c1974.
300 |aviii, 196 p. : |bcharts, ill., maps
4901 |aTechnical bulletin ; |vTB 189
500 |aCover title.
500 |a"March 1974."
500 |aDigitized edition from print [produced by Natural Resources Canada].
504 |aIncludes bibliographical references (p. 105).
5203 |a“A method, developed in France, for mining thick, flat lying coal seams is described in detail. A longwall face is retreated along the footwall of the thick seam and is supported by powered supports which incorporate a special banana prop at the rear. The coal overlying the face caves behind it and is drawn through the banana props onto a rear face conveyor. Face advance is achieved either by hand mining or by using a conventional double drum shearer. Details of the mining method, problems encountered and good and bad mining practice are discussed. The capital and operating costs, the production and productivity in France are given. Ground control and environmental control problems are also discussed. Consideration is then given to the potential use of this method for mining thick, flat lying, coking coal seams in Western Canada"--Abstract, p. i.
69207|2gccst|aMining industry
69207|2gccst|aCoal
7101 |aCanada. |bNatural Resources Canada.
7101 |aCanada. |bMines Branch.
830#0|aTechnical bulletin (Canada. Dept. of Energy, Mines and Resources. Mines Branch)|vTB 189|w(CaOODSP)9.834857
85640|qPDF|s15.76 MB|uhttps://publications.gc.ca/collections/collection_2017/rncan-nrcan/M34-20/M34-20-189-eng.pdf