Strata bunkers: Design and construction in the western area of the national coal board

II3A

Mines 806095' 'WAIKI~ CANOPY' OPEN INVERT SHIELD SPEEDS MINE DEVELOPMENT Wc~t, K G

Tunn Tunnlg, Vl2, N6, July 1980, ~50-51 Describes the machine in the form of a walking horseahoe shaped shield, designed far operation in an 18ft x 16ft NCB road heading, ar~ scheduled for field trials in late 1980. 806096 TUNNEL BORINU IN A DEEP SOUTH AFRICAN GOLD MINE Burgess, Hi Taylor, J G Trans Inst Min Metall (Sect A Min Ind), V89,

April 1980, PAS~-A98 Reports the use of a Wirth tunnel borer for driving a ll50m long main haulage tunnel at a depth of 1627m. The fermations varied from tough and abrasive to soft and fractured quartzites in a severely faulted zone. Support requirements, problems with cutters, boring parameters for each geological zone and machine perfarmance are discussed.

8o6o97 PREDICTION OF PROGRESSIVE HANGING-WAI/h CAVING, GATH' S MINE, EHODESIA Brown, E T; Ferguson, G A Trans Inst Min Metall (Sect A Min Ind), V88, July 1979, PA92-AI05 An anaA~rtical model based on the limiting equilibrium method is used to develop an understanding of the mechanics of progressive ha~ging-wall caving mining of an inclined Orebody. The method is applied to predict future mining operations at Gath's m l n % taking into account local factors such as variations in topography, backfilling and three-dlmensional effects at the lateral extremities of mining. 806098 CONCEPTUAL APPLICATION OF LONG HOLE DRILLING TO SHA]~f sINKING USING SAND-FILLED HOLES sturgess, J Aust Min, V72, NS, March 1980, P46-50 Discusses the possible application of track mounted down-the-hole drills in the drilling cycle of shaft sinking. Large diameter holes would be drilled to a depth of about 30m in the shs£t bottom, located in a 'full-face' blasting pattern, filled with sand and blasted at short, controlled intervals. Work cycles ~mnd economic factors ~re discussed. 806099 PETROSCOPIC OBSERVATIONS OF ROCK FRACTURING [
806101 SOME PRACTICAL ASPECTS IN THE DEVELOPMENT OF THE SELBY PROJECT Robertson n J T Min Engr, V139, N222, March 1980, P713-721 Details are given of the geological aspects leading to the decisions for freezlr~ and grouting to be used as the most efficient method of water control, with particular reference to shield arrangement a~d the use of spheroidal graphite cast iron segmented linings at Gascoigr~ Wood drift. Problems reviewed include driving through alluvit~% controlling water in sandstones and limestones, shaft sinking and driving through weakly cemented sandstone. 806102 APPLICATION OF HARD ROCK CONTINUOUS MINERS TO CUT-AND-FILL SLOT STOPING Sparks, C B Min C o r ~ J, V66, NS, May 1980, P29-33 806103 APPLICATION OF HIGH PRESSURE WATER J ~ S

IN

coAL ~NING (IN GERMAN) Stmlmers, D A Glnckauf-forschungsh, V41, N!, Feb 1980 ,

P28-3o 806104 HYDROGEOLOGICAL ANALYSIS, GROUND TREATMENT AND SPECIAL CONSTRUCTION TECHNIQUES AT SELBY: GASCOIGNE WOOD SURFACE DRIFT MINE Forrestj W] Black, J C In: Tunnelling '79, Proceedings of the 2nd International Symposium, London 12-16 March 1979, P256-263. Publ London: IMP, 1979 Construction ar~ llni~g techniques used for this drift include the shield tunnelling method, dewaterlng wells, l~regroutlng, grotu~d freezing, and the use of spheroidal graphite iron segmental linings. 806105 NEW SILVEEDALE COLLIERY PROJECT Hill, A J In: Tunnelling '79, Proceedings of the 2nd International Symposlt~n, London, 12-16 March 1979, P305-315. Publ London: I~ff{, 1979 Reports the design and construction of portals arr~ drifts for this new colliery in Staffordshire, t~, with particular reference to the use of a boom-type roadheader (originally developed for civil erginearing work). 806106 STRATA BUNKERS: DESIGN AND CONSTRUCTION IN T!TE WESTERN AREA OF THE NATIONAL COAL BOARD Grime, D In: Tunnelling '79, Proceedings of the 2nd International Symposium, London, 12-16 March 1979, P31g-326. Publ London: IMM,

]I979 Construction is by sinking with a large diameter boring machine. Precast reinforced-concrete segmented linings are used. 806107 ARCH FOP~WATION AND PILLZtR YIELD IN JOINTED ROCK Bs~rett, J R~ Grumltt, B; Wical I M Proc 4th Congress International Society for Rock Mechanics, Montreux, 2-8 Sept 1979, Vol 2, P17-23 . Publ Rotterdam, A A Balkema,

1979 Describes mining at King Island Scheelite by a variation of room and pillar mining called postpillar cut a~d fill, and reports an investigation