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Research and development of high speed, automated mechanical excavation systems for underground construction
85A
Machine excavation 882260 Developments on drums and shearers (In German and English) Plum, D Gluckauf V123, N I L 3 Sept 1987, P1080-1091 (german J,
P472-477 (english) Shearers are more efficient than ploughs in seams of medium to hard workability, but are less desirable in terms of fines content, dirt content, and dust make. Developments in pick and drum design to overcome these drawbacks are described. Systematic choice of size and shape of pick and pick material to reduce the number of picks on standard drums, the use large product drums and, in future, disc drums are described, together with improvements in loading technology.
882261 Vibratory bucket has mine potential
World Min Equip VII, N6, June 1987. P36-37
882264 Research and development of high speed, automated mechanical excavation systems for underground construction Ozdemir, L Proc 2nd International Conference on Innovative Alining
Systems, Pennsylvania, 27-29 October 1986 P75-82. Publ Pennsyh'ania: Pennsylvania State Unit'ersity. 1986 Present work at the Colorado School of Mines Earth Mechanics Institute is reviewed. Work described includes laboratory testing of linear cutting, water jet assisted cutting, and rotary cutting, computer modelling of cutterhead design, and machine control and automation. This work is primarily aimed at improving the performance of tunnel, raise and shaft boring machines. 882265 Continuous mining and automation in hard rock: there seems to be a need for a little R and D Nielsen, K Proe 2nd International Conference on Innovative Mining
Systems, Pennsylvania, 27-29 October 1986 P83-89. Publ Pennsyh,ania: Pennsylvania State University 1986
The Hydro-Dynamic-Technic (HDT) bucket which has been under development in Germany since 1981 is described. It has the ability to tear hard, difficult overburdens which would otherwise require loosening by blasting or the use of a much larger conventional excavator. Despite its high initial cost, it may be viable because of production gains or removal of the blasting stage of overburden stripping.
Modern hard rock mining is highly mechanised, but automation is made difficult because of uncontrolled fragmentation in stope blasting. Mechanical breakage produces regular sized fragments, but current tunnel or raise boring technology is too inefficient to be economic. Further improvements are possible here, and also in the field of controlled blasting technology to produce more even fragmentation. If these processes can be improved sufficiently, hard rock mining with continuous ore flow, similar to present coal mining, may be possible.
882262 Drill and blast challenger gets a second chance
Rock and Soil Reinforcement and Support
World Min Equip VII. N7, July 1987, P18-21 The development of a mobile miner suitable for cutting a single conveyor heading in hard rock is described. The machine is crawler mounted and part roadbeader, part TBM, and part face support unit in appearance. It was used to cut a decline in rock 70% very hard, abrasive quartzites and 30% chloritic schists and carbonaceous shales. Performance, cutter wear, dust control and design modification are described. It is concluded that the mobile miner can provide a reasonable alternative to drill and blast with particular advantages in terms of ground support requirement and smooth air flow.
882263 Safer and more productive mining with a computer-controlled, water-jet assisted Iongwall shearer Kogelmann, W J; Thimons, E D Proc 2nd International Conference on Innovative Atining
@stems, Pennsylvania, 27-29 October 1986 P56-68. Publ Pennsyh'ania: Pennsyl~'ania State Unirersity, 1986 A water jet assisted Iongwall shearer which can be fitted to existing machinery is described. The history of water jet assisted Iongwalling is briefly presented and the cutting principles of dry and water jet assisted bits examined. The advantages of water jet assisted longwall shearing in terms of reduced dust make and sparking, coarse coal with fewer fines, increased cutting rate and lower wear are described. A detailed design for a water jet assisted longwall shearer which is currently undergoing trials is given. Finally, the possibilities of automation of Iongwall shearing and roof bolting are considered.
Bolts and anchors See also: 882075, 882245 882266 Roof bolting in Sooth Wales Williams, G
Collier), Guard 1/235, N8, Aug 1987, P311-314 In the South Wales Coalfield there is increased use of retreat mining operations with in-seam gateroads. Strata reinforcement by bolting is of major interest. An exercise at the Betws New Mine is described. Choice of site, site layout, bolting equipment, monitoring equipment, evaluation of the anchoring capacities of various roof bolts, and the implementation of the results of the tests are presented. 882267 Design consideration for reinforcement of coal mine roadways in the lllawarra coal measures Gale, W J In: Ground Movement and Control Related to Coal Mining
(papers to the Symposium, lllawarra, August 1986) P82-92. Publ Parkville: AuslMM, 1986 The lllawarra coal measures lie in a highly stressed region of the Sydney Basin. A program to delineate factors which influence roadway deformations and design a suitable support system is described. Initially,virgin stress field measurements and the gross characterisation of rock mass behaviour from previous works were studied. The mechanism of the grouted bolt
c~ 1988 Pergamon Press pie. Reproduction not permitted
Machine excavation 882260 Developments on drums and shearers (In German and English) Plum, D Gluckauf V123, N I L 3 Sept 1987, P1080-1091 (german J,
P472-477 (english) Shearers are more efficient than ploughs in seams of medium to hard workability, but are less desirable in terms of fines content, dirt content, and dust make. Developments in pick and drum design to overcome these drawbacks are described. Systematic choice of size and shape of pick and pick material to reduce the number of picks on standard drums, the use large product drums and, in future, disc drums are described, together with improvements in loading technology.
882261 Vibratory bucket has mine potential
World Min Equip VII, N6, June 1987. P36-37
882264 Research and development of high speed, automated mechanical excavation systems for underground construction Ozdemir, L Proc 2nd International Conference on Innovative Alining
Systems, Pennsylvania, 27-29 October 1986 P75-82. Publ Pennsyh'ania: Pennsylvania State Unit'ersity. 1986 Present work at the Colorado School of Mines Earth Mechanics Institute is reviewed. Work described includes laboratory testing of linear cutting, water jet assisted cutting, and rotary cutting, computer modelling of cutterhead design, and machine control and automation. This work is primarily aimed at improving the performance of tunnel, raise and shaft boring machines. 882265 Continuous mining and automation in hard rock: there seems to be a need for a little R and D Nielsen, K Proe 2nd International Conference on Innovative Mining
Systems, Pennsylvania, 27-29 October 1986 P83-89. Publ Pennsyh,ania: Pennsylvania State University 1986
The Hydro-Dynamic-Technic (HDT) bucket which has been under development in Germany since 1981 is described. It has the ability to tear hard, difficult overburdens which would otherwise require loosening by blasting or the use of a much larger conventional excavator. Despite its high initial cost, it may be viable because of production gains or removal of the blasting stage of overburden stripping.
Modern hard rock mining is highly mechanised, but automation is made difficult because of uncontrolled fragmentation in stope blasting. Mechanical breakage produces regular sized fragments, but current tunnel or raise boring technology is too inefficient to be economic. Further improvements are possible here, and also in the field of controlled blasting technology to produce more even fragmentation. If these processes can be improved sufficiently, hard rock mining with continuous ore flow, similar to present coal mining, may be possible.
882262 Drill and blast challenger gets a second chance
Rock and Soil Reinforcement and Support
World Min Equip VII. N7, July 1987, P18-21 The development of a mobile miner suitable for cutting a single conveyor heading in hard rock is described. The machine is crawler mounted and part roadbeader, part TBM, and part face support unit in appearance. It was used to cut a decline in rock 70% very hard, abrasive quartzites and 30% chloritic schists and carbonaceous shales. Performance, cutter wear, dust control and design modification are described. It is concluded that the mobile miner can provide a reasonable alternative to drill and blast with particular advantages in terms of ground support requirement and smooth air flow.
882263 Safer and more productive mining with a computer-controlled, water-jet assisted Iongwall shearer Kogelmann, W J; Thimons, E D Proc 2nd International Conference on Innovative Atining
@stems, Pennsylvania, 27-29 October 1986 P56-68. Publ Pennsyh'ania: Pennsyl~'ania State Unirersity, 1986 A water jet assisted Iongwall shearer which can be fitted to existing machinery is described. The history of water jet assisted Iongwalling is briefly presented and the cutting principles of dry and water jet assisted bits examined. The advantages of water jet assisted longwall shearing in terms of reduced dust make and sparking, coarse coal with fewer fines, increased cutting rate and lower wear are described. A detailed design for a water jet assisted longwall shearer which is currently undergoing trials is given. Finally, the possibilities of automation of Iongwall shearing and roof bolting are considered.
Bolts and anchors See also: 882075, 882245 882266 Roof bolting in Sooth Wales Williams, G
Collier), Guard 1/235, N8, Aug 1987, P311-314 In the South Wales Coalfield there is increased use of retreat mining operations with in-seam gateroads. Strata reinforcement by bolting is of major interest. An exercise at the Betws New Mine is described. Choice of site, site layout, bolting equipment, monitoring equipment, evaluation of the anchoring capacities of various roof bolts, and the implementation of the results of the tests are presented. 882267 Design consideration for reinforcement of coal mine roadways in the lllawarra coal measures Gale, W J In: Ground Movement and Control Related to Coal Mining
(papers to the Symposium, lllawarra, August 1986) P82-92. Publ Parkville: AuslMM, 1986 The lllawarra coal measures lie in a highly stressed region of the Sydney Basin. A program to delineate factors which influence roadway deformations and design a suitable support system is described. Initially,virgin stress field measurements and the gross characterisation of rock mass behaviour from previous works were studied. The mechanism of the grouted bolt
c~ 1988 Pergamon Press pie. Reproduction not permitted