abercrombie and fitch deutschland 131 orebody gob

Shengdanjiui

131 orebody gob roof stability

When leaving room between the support columns and along the dip direction, mining finished two middle, and the preservation of the middle pillar of the case, although the scope of gob large, but in the meantime there are many pillar boundary conditions, Gob will remain relatively stable, but keeping the length of time depends on an empty area in the range of stability of mine rock vary. (3) while in the middle of mining more than 2, or keep them under the conditions of the middle pillar, gob span to 100m (clear span to 94m), that collapse out of a room pillar, the roof cave damage will occur, take drop height of up to 50m or so that the gob in the unstable state, when the span reaches or exceeds 150m (net cross-144m), the empty area will be a large area avalanche, height up to 100m, and until the surface, the space-time area can be considered into the avalanche state. (4) If the gob mining along the dip direction to the middle of 3,abercrombie and fitch deutschland, that is taken down to the high 90m, plagioclase mining to 140m, such as the middle pillar reserves, and adequate strength, the empty area is still not a large area Caving in, caving in the state that will not; but if the collapse of the middle pillar out, then that is a large area avalanche, and spread to the surface, there subsidence collapse phenomenon. (5) When the first three taken after the middle, between the middle of the first pillar 2,3 there signs of damage, indicating that this pillar strength is small, such as consider the use of natural support pillar mined area, the middle pillar should be properly widened. (6) after the formation of mined areas, stress concentration area is located in pillar and arch supporting the foot; displacement maximum at the roof in the middle of an empty area; destruction of the first in the stress concentration zone, which appears pillar and arch; then formed to take drop arch; inclined direction along the high stress, displacement and destruction of most serious area located the bottom of an empty area of plagioclase about 1 / 3. (Received 2003-05-06) (Continued from page 6) Mining and construction phases, the open boundary optimization, large blasting technology to vehicles on behalf of the plant mixed explosives technology, steep slope mining technology, Vibrating Steam iron ore joint development and transportation reproduced, intermittent continuous transport, mining equipment, and localization of large-scale scientific technical and economic evaluation, open pit of the automatic dispatch system, conveyors and steep inclined railway technology. Design of underground mining tasks include upgrading systems, transportation systems, ventilation systems, drainage systems, communication systems, power systems, broken systems, mining methods, to develop system design,magasin abercrombie, and production design. A modern underground mine design ideas include: integrated scheduling technology, integrated with mining technology, modern support technology, security, environmental protection and controlled blasting techniques, multi-machine stations and ventilation technology combined centralized ventilation, underground mine of modern communication technology, no one vehicle technology. 6 mines mining design development direction of modern design methods should emerge and growing batch of modern design theory and methods applied to the design process to enable more complete design methodology. In the design process, to the application of modern design theory and modern design techniques, and strive to improve the design quality of the first design. Mine modern design creative thinking to play, mainly in the new theories, new technologies, new materials application in the mines, new equipment, new technology and application of the invention. Mine is reflected in the reliability of modern design and computer-based central control system application of modern mining equipment for the realization of the basis of unmanned mine. Mine design tools will be based on deposits into the body as the basis for modern design,ed hardy danmark, with the ultimate goal is to achieve unmanned mine, Canada is expected to basically completed 50 years of this century, mine, mine until the unmanned intelligent mines. Mine is a high-tech design of the future will focus on applications of subject areas, such as the gradual rise of ocean mining, to modern chemistry and biochemistry as the support of leaching mining, modern aerospace technology to support the lunar mining, are high-tech centralized applications. References 1 Xu, et al. System Science. Shanghai: Shanghai Science and Technology Press, 200o2 Liaolin Qing, Zheng Guangze, et al. Modern design methods. Chongqing: Chongqing University Press, 20003 Zhangyou City, Wang Chun. Mining System Engineering. Xuzhou: China University of Mining Press, 20004 Jiao Yushu, Choi Si-by. Metallurgical and mining technology and mature application development technology. China Metallurgical Mining Sustainable Development Strategy, 200O5 Chen Kewen, Good Health. Information technology applications in the mining industry and prospects. Metal Mine, 20O2 (1): 5 ~ 76 APPLIED & coke jade book, and so on. Turn of the century the development of open pit design. China Metallurgical Mining Sustainable Development Strategy, 200O7 Licui Ping, LI Zhong, et al. Deposit volume visualization and simulation system framework. Metal Mine, 2001 (10): 44 ~ 47,48 (Received 2003-4 ~ '/) f the Secretary

相关的主题文章：

Tory Burch shoes 2004 iron ore products market situation and

imagenes ed hardy Decline of iron ore in 1996 ended years of

2000DL supporting mechanized drilling and post- installed operating line _114 Construction