Technological Analysis and Application of the Aquifer Inclined Shaft Integrated Controlling of Water

2014 ◽  
Vol 638-640 ◽  
pp. 842-845
Author(s):  
Guang Xiang Yang ◽  
Mao Sheng Wu ◽  
Yu Zhi Lv ◽  
Jian Jun Geng

In view of the southwest region of Inner Mongolia encountered in the process of shaft construction of fissure aquifer water inrush problem, take the Great Wall No. 5 mine as an engineering example, key technology of the southwest region of Inner Mongolia shaft over aquifer such as freezing method, grouting method, water prospecting method are analyzed, curbing the aquifer of the adverse effects of shaft construction effectively, solving the difficult problem such as the loading and transportation of waste rock, it provides the reference of prevention and control of water for similar conditions in western region of shaft construction.

2017 ◽  
Vol 107 (09) ◽  
pp. 594-599
Author(s):  
A. Magaña ◽  
G. Prof. Reinhart

Industrieroboter sind zu einer Schlüsseltechnologie in der Produktion geworden. Mit dem steigenden Einsatz von diversen Robotersystemen wächst das Bedürfnis, deren Kompatibilität zu steigern. Heutzutage gibt es keine Technologie in der Industrie, die eine standardisierte Programmierung und Steuerung von verschiedenen Robotersystemen gewährleisten kann. Dieser Fachbeitrag präsentiert ein einheitliches Konzept, welches die Anwendung von herstellerneutralen Roboterapplikationen ermöglicht.   Industrial robots have become a key technology in production. The increasing use of various robotic systems, raises the need to enhance their compatibilit.y Nowadays, there is no technology in the industry to guarantee a standardized programming and control of different robot systems. This article presents a concept enabling the use of manufacturer-independent robot applications.


Author(s):  
Bryan G. Norton

Albert Hochbaum, whom we met in Chapter 3, was Leopold’s student and friend; Director of the Delta Duck Station in Manitoba, Canada; and a part-time collaborator on A Sand County Almanac. He also had an admirable talent for succinctly hitting the nail on the head. He summed up Leopold’s message in four words. “The lesson you wish to put across is the lesson that must be taught,” he said, “preservation of the natural.” So much for succinctness; the difficult problem, of course, is to explain what is meant by “preservation” and by “natural.” Thomas McNamee, writing forty years later, uses the same basic approach: “I believe that the true object of conservation is nature,” he says. “What is nature?” The answer cannot help but be complicated, he notes, because “our conception of nature springs from the darkest depths of our culture’s unconscious sense of life itself, and ancient irrational urges and fears give the concept its power.’” But that is only half of the story: “At the same time,” he says, “nature must also have an objective, rational, manageable, thinkable value.” And thus we have the paradox of modern land use theory: Americans love nature; our values were formed in nature’s womb, a huge, wonderful, and horrible wild place. Our values are freedom and independence, “split rail values,” as Leopold called them. But our activities, as builders and consumers, transform our environment into something not-wild; we manipulate and control and artificialize nature; we make it not-nature. As the song says, you always hurt the one you love. But the paradox has also an optimistic face: As we have built and consumed, we have become wealthy by exploiting nature. Wildness has become valuable, objectively, according even to economists, because our wealthy society is now willing to pay to preserve nature. But here is the bitter pill to swallow: We all must admit that, at least in some sense, “nature” preservation is a sham—we’ve gone too far to “free” nature, as we might free a wild animal, release it from captivity.


Geofluids ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Qiding Ju ◽  
Yu Liu ◽  
Youbiao Hu ◽  
Yuquan Wang ◽  
Qimeng Liu ◽  
...  

Mining activities interfere into the natural groundwater chemical environment, which may lead to hydrogeochemical changes of aquifers and mine water inrush disasters. The study of hydrogeochemical evolution processes of underground aquifers is helpful to the prevention and control of mine water inrush. The results show that the study area is mainly impacted by four hydrogeochemical processes: dissolution, cation exchange, desulfurization and reduction, and pyrite oxidation. The Cenozoic aquifers are dominated by carbonate dissolution and desulfurization. The Permian aquifers are impacted mainly by cation exchange and sulfate dissolution, followed by pyrite oxidation. The Carboniferous aquifers are mainly impacted by dissolving sulfate, followed by pyrite oxidation and cation exchange. The hydrogeochemical evolution of the aquifers was controlled by mining activities and tectonic changes, and a certain regularity in space. For the Cenozoic aquifers, sulfate dissolution and cation exchange increase from west to east, and desulfurization weakens. For the Permian aquifers, cation exchange and sulfate dissolution are stronger near synclines and faults, pyrite oxidation is enhanced, and desulfurization decreases from the middle to the east of the mining area. For the Carboniferous aquifers, there is a higher dissolution of rock salt, pyrite oxidation, and cation exchange from west to east, and the desulfurization effect weakens.


Geosciences ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 392 ◽  
Author(s):  
Sheng Wang ◽  
Shucai Li ◽  
Liping Li ◽  
Shaoshuai Shi ◽  
Zongqing Zhou ◽  
...  

Water inrush is one of the most frequent and harmful geological disasters in tunnel construction. In order to effectively prevent and control the occurrence of water inrush, an early warning method based on fine risk evaluation and hierarchical advanced forecast is proposed. Water inrush is a complex dynamic coupling factors system, the relationship between influencing factors and water inrush is strongly nonlinear. Therefore, the efficacy coefficient model, which has the advantages of standardization, conciseness, and freedom from subjective factors, is improved nonlinearly. The fine risk evaluation theory and method based on the improved efficacy coefficient model consisted of two parts: one is static evaluation used in design stage, and the other is dynamic evaluation applied in the construction stage. The index weights are determined scientifically and reasonably by Analytical Hierarchy Process (AHP) and the entropy method. According to the fine risk evaluation results, combined with the advantages and disadvantages of various forecasting methods, a multistep hierarchical detection method of disaster resources for water inrush is proposed to identify the occurrence characteristics and failure level of disaster sources. The theory has been successfully applied to the #3 inclined well of Yuelongmen Tunnel in Cheng-Lan Railway. The evaluation results had good agreement with the actual excavation data, which indicates that the model is of high credibility and feasibility. The method could improve the prediction accuracy of water inrush and explore geometric characteristics and filling of disaster-causing structures. It is of great significance for avoiding water inrush and guiding the rapid and safe tunnel construction.


2012 ◽  
Vol 118 ◽  
pp. 1-9 ◽  
Author(s):  
Xunming Wang ◽  
Ting Hua ◽  
Caixia Zhang ◽  
Lili Lang ◽  
Hongtao Wang

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