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Roof bolting in South Wales
33A
Machine excavation 881260 Developments on drums and shearers (In German and English) Plum, D
Glackanf V123, NIL 3 Sept 1987, P1080-1091 (german), P472-477 (enghsh)
881264 Research and development of high speed, automated mechanical excavation s y s t e m for underground construction
Ozdemlr, L Proc 2nd International Conference on Innovative MiMag Systems, Peansylearda, 27-29 October 1986 P7~-82 Publ Pennsylvania Pennsylrama State Unwerstty. 1986
Shearers are more eliictent than ploughs m seams of medium to hard workabdRy, but are less desirable m terms of fines content, dirt content, and dust make Developments in p~ck and drum design to overcome these drawbacks are desenbed Systemauc choice of size and shape of p~ck and peck material to reduce the number of pecks on standard drums, the use large product drums and, m future, disc drums are described, together wRh improvements m loading technology
Present work at the Colorado School of Mmes Earth Mechanics InstRute ts reviewed Work desenbed mcludes laboratory testmg of hnear cuttmg, water jet assisted cuttmg, and rotary cuttmg, computer modelhng of cutterhead design, and machme control and automation This work ts primarily aimed at tmprovmg the performance of tunnel, raise and shaft bonng machmes
881261 Vibratory bucket has mine potential
Proc 2nd International Conference on Innovative M b ~ g Systems, Penasylvama, 27-29 October 1986 P83-89 Publ Pennsylvama Pennsylvama State Umverstty 1986
World Min Equip VII. N6. June 1987. P36-37
881265 Continuous mining and automation in hard rock: there stems to be a need for a little R and D Ntelsen, K
The Hydro-Dynamlc-Techmc (HDT) bucket which has been under development m Germany smce 1981 ts desenbed It has the abdlty to tear hard. difficult overburdens which would otherwise reqmre Ioosenmg by blastmg or the use of a much larger convenUonai excavator Despite Rs high mtttai cost. it may be wable because of production gams or removal of the blastmg stage of overburden stripping
Modern hard rock taming ts highly mechantsed, but automation ts made difficult because of uncontrolled fragmentation m stope blastmg Mechamcal breakage produces regular sized fragments, but current tunnel or raise bonng technology ts too mefficsent to be economic Further improvements are possible here, and also m the field of controlled blastmg technology to produce more even fragmentation If these processes can be Improved sufficiently, hard rock mmmg with continuous ore flow, stmdar to present coal mmmg. may be possible
881262 Drill and blast challenger gets a second chance
Rock and Soil Reinforcement and Support
World Min Equip VII. N7. July 1987. P!8-21 The development of a mobde tamer suitable for cuttmg a stogie conveyor headmg m hard rock ts desenbed The machme ts crawler mounted and part roadheader, part TBM, and part face support umt in appearance It was used to cut a dechne m rock 70% very hard. abrasive quartzRes and 30% chlonuc schists and carbonaceous shales Performance, cutter wear, dust control and design modtficatmn are desenbed It ts concluded that the mobde mmer can prowde a reasonable alternative to drill and blast with particular advantages m terms of ground support reqmrement and smooth air flow
881263 Safer and m o r e productive mining with a computer-controlled, water-jet assisted IongwaH shearer Kogelmann, W J, Thtmons, E D
Proc 2nd International Conference on Innovative Mining Systems, Pennsylvania, 27-29 October 1986 t'56-68 Publ Pennsylvania Pennsylvama State Umverstty. 1986 A water jet assisted Iongwall shearer which can be fitted to exsstmg machmery ts desenbed The history of water jet assisted Iongwalhng ts briefly presented and the cuttmg pnnclpies of dry and water jet assisted bRs exammed The advantages of water jet assisted iongwall sheanng in terms of reduced dust make and sparkmg, coarse coal with fewer fines, mcreased cuttmg rate and lower wear are desenbed A detaded design for a water jet assisted iongwall shearer which is currently undergomg trials ts given Fmally, the posstbdRtes of automation of Iongwali sheanng and roof bolting are considered
Bolts and anchors See also 881075, 881245 881266 Roof bolting in South Wales Wdhams, G
Colliery Guard V235. N8. Aug 1987. P311-314 In the South Wales Coalfield there ts mcreased use of retreat mining operations with m-seam gateroads Strata remforcement by bolting ts of major mterest An exercise at the Betws New Mine ts described Choice of site. site layout, bolting equipment, momtonng equipment, evaluation of the anchormg capacRtes of various roof bolts, and the lmplementauon of the results of the tests are presented 881267 Design consideration for reinforcement of coal mine roadways in the Iilawarra coal measures Gale, W J
In: Ground Movement and Control Related to Coal Mining (papers to the Symposium, lllawarra, August 1986) t'82-92 Pubi Parkvdle AuMMM. 1986 The Illawarra coal measures he m a highly stressed region of the Sydney Basin A program to delineate factors which returnee roadway deformations and design a suitable support system is described Imually.vtrgm stress field measurements and the gross charactensatton of rock mass behavtour from previous works were studied The mechanism of the grouted bolt
© 1988 Pergamon Press plc ReproducUon not permitted
Machine excavation 881260 Developments on drums and shearers (In German and English) Plum, D
Glackanf V123, NIL 3 Sept 1987, P1080-1091 (german), P472-477 (enghsh)
881264 Research and development of high speed, automated mechanical excavation s y s t e m for underground construction
Ozdemlr, L Proc 2nd International Conference on Innovative MiMag Systems, Peansylearda, 27-29 October 1986 P7~-82 Publ Pennsylvania Pennsylrama State Unwerstty. 1986
Shearers are more eliictent than ploughs m seams of medium to hard workabdRy, but are less desirable m terms of fines content, dirt content, and dust make Developments in p~ck and drum design to overcome these drawbacks are desenbed Systemauc choice of size and shape of p~ck and peck material to reduce the number of pecks on standard drums, the use large product drums and, m future, disc drums are described, together wRh improvements m loading technology
Present work at the Colorado School of Mmes Earth Mechanics InstRute ts reviewed Work desenbed mcludes laboratory testmg of hnear cuttmg, water jet assisted cuttmg, and rotary cuttmg, computer modelhng of cutterhead design, and machme control and automation This work ts primarily aimed at tmprovmg the performance of tunnel, raise and shaft bonng machmes
881261 Vibratory bucket has mine potential
Proc 2nd International Conference on Innovative M b ~ g Systems, Penasylvama, 27-29 October 1986 P83-89 Publ Pennsylvama Pennsylvama State Umverstty 1986
World Min Equip VII. N6. June 1987. P36-37
881265 Continuous mining and automation in hard rock: there stems to be a need for a little R and D Ntelsen, K
The Hydro-Dynamlc-Techmc (HDT) bucket which has been under development m Germany smce 1981 ts desenbed It has the abdlty to tear hard. difficult overburdens which would otherwise reqmre Ioosenmg by blastmg or the use of a much larger convenUonai excavator Despite Rs high mtttai cost. it may be wable because of production gams or removal of the blastmg stage of overburden stripping
Modern hard rock taming ts highly mechantsed, but automation ts made difficult because of uncontrolled fragmentation m stope blastmg Mechamcal breakage produces regular sized fragments, but current tunnel or raise bonng technology ts too mefficsent to be economic Further improvements are possible here, and also m the field of controlled blastmg technology to produce more even fragmentation If these processes can be Improved sufficiently, hard rock mmmg with continuous ore flow, stmdar to present coal mmmg. may be possible
881262 Drill and blast challenger gets a second chance
Rock and Soil Reinforcement and Support
World Min Equip VII. N7. July 1987. P!8-21 The development of a mobde tamer suitable for cuttmg a stogie conveyor headmg m hard rock ts desenbed The machme ts crawler mounted and part roadheader, part TBM, and part face support umt in appearance It was used to cut a dechne m rock 70% very hard. abrasive quartzRes and 30% chlonuc schists and carbonaceous shales Performance, cutter wear, dust control and design modtficatmn are desenbed It ts concluded that the mobde mmer can prowde a reasonable alternative to drill and blast with particular advantages m terms of ground support reqmrement and smooth air flow
881263 Safer and m o r e productive mining with a computer-controlled, water-jet assisted IongwaH shearer Kogelmann, W J, Thtmons, E D
Proc 2nd International Conference on Innovative Mining Systems, Pennsylvania, 27-29 October 1986 t'56-68 Publ Pennsylvania Pennsylvama State Umverstty. 1986 A water jet assisted Iongwall shearer which can be fitted to exsstmg machmery ts desenbed The history of water jet assisted Iongwalhng ts briefly presented and the cuttmg pnnclpies of dry and water jet assisted bRs exammed The advantages of water jet assisted iongwall sheanng in terms of reduced dust make and sparkmg, coarse coal with fewer fines, mcreased cuttmg rate and lower wear are desenbed A detaded design for a water jet assisted iongwall shearer which is currently undergomg trials ts given Fmally, the posstbdRtes of automation of Iongwali sheanng and roof bolting are considered
Bolts and anchors See also 881075, 881245 881266 Roof bolting in South Wales Wdhams, G
Colliery Guard V235. N8. Aug 1987. P311-314 In the South Wales Coalfield there ts mcreased use of retreat mining operations with m-seam gateroads Strata remforcement by bolting ts of major mterest An exercise at the Betws New Mine ts described Choice of site. site layout, bolting equipment, momtonng equipment, evaluation of the anchormg capacRtes of various roof bolts, and the lmplementauon of the results of the tests are presented 881267 Design consideration for reinforcement of coal mine roadways in the Iilawarra coal measures Gale, W J
In: Ground Movement and Control Related to Coal Mining (papers to the Symposium, lllawarra, August 1986) t'82-92 Pubi Parkvdle AuMMM. 1986 The Illawarra coal measures he m a highly stressed region of the Sydney Basin A program to delineate factors which returnee roadway deformations and design a suitable support system is described Imually.vtrgm stress field measurements and the gross charactensatton of rock mass behavtour from previous works were studied The mechanism of the grouted bolt
© 1988 Pergamon Press plc ReproducUon not permitted