Mine Shaft
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Author | : Paweł Kamiński |
Publisher | : CRC Press |
Total Pages | : 146 |
Release | : 2021-11-28 |
Genre | : Technology & Engineering |
ISBN | : 1000474615 |
Rope guidance of conveyances is commonly used in shafts of underground mines in numerous countries on almost every continent. This safe and economical way of guiding skips and cages does have one disadvantage, however, which is especially troublesome in the conditions present in the Polish mining industry. Rope-guided conveyances require additional support at mine levels, while shafts of Polish coal mines usually operate on many levels. Additional stiff guidance at mine levels used as a support negatively affects the effectiveness of rope-guided hoisting systems. The retractable guidance system was originally introduced at the 960 m level in the Leon IV shaft of the Rydułtowy coal mine in Rydułtowy (currently ROW mine, Rydułtowy department), Silesian voivodeship, Poland. This construction, consisting of moveable elements, similar to the typical stiff guidance used at mine levels, serves as a support for the conveyance whenever necessary. When it is retracted, it allows the cage to travel at full speed through the level, increasing the degree of effectiveness of the hoisting system of the Leon IV shaft. The retractable guidance system, the solution presented in this book, is a pioneering approach in the Polish mining industry. It has allowed improvement of the level of effectiveness of the Leon IV shaft of the Rydułtowy colliery. It is an innovative opportunity for rope guidance systems worldwide, as it solves their biggest problem in multi-level shafts.
Author | : Samuel S. M. Chan |
Publisher | : |
Total Pages | : 48 |
Release | : 1985 |
Genre | : Finite element method |
ISBN | : |
Author | : Renata Adler |
Publisher | : Macmillan |
Total Pages | : 406 |
Release | : 2001-08-25 |
Genre | : History |
ISBN | : 031227520X |
From the civil war in Biafra to the Kent State shootings to Watergate to Monica Lewinsky, one of the most brilliant polemicists writing today examines the increasing interpenetration of politics and media and what it means for the future of democracy in America.
Author | : Michael Grant |
Publisher | : Harper Collins |
Total Pages | : 321 |
Release | : 2011-04-05 |
Genre | : Young Adult Fiction |
ISBN | : 0062077163 |
Plague, Michael Grant's fourth book in the bestselling Gone series, will satisfy dystopian fans of all ages. It's been eight months since all the adults disappeared. Gone. They've survived hunger. They've survived lies. But the stakes keep rising, and the dystopian horror keeps building. Yet despite the simmering unrest left behind by so many battles, power struggles, and angry divides, there is a momentary calm in Perdido Beach. But enemies in the FAYZ don't just fade away, and in the quiet, deadly things are stirring, mutating, and finding their way free. The Darkness has found its way into the mind of its Nemesis at last and is controlling it through a haze of delirium and confusion. A highly contagious, fatal illness spreads at an alarming rate. Sinister, predatory insects terrorize Perdido Beach. And Sam, Astrid, Diana, and Caine are plagued by a growing doubt that they'll escape—or even survive—life in the FAYZ. With so much turmoil surrounding them, what desperate choices will they make when it comes to saving themselves and those they love? “Grant’s sf-fantasy thrillers continue to be the very definition of a page-turner.” —ALA Booklist Read the entire series: Gone Hunger Lies Plague Fear Light Monster Villain Hero
Author | : H. C. Loesche |
Publisher | : |
Total Pages | : 12 |
Release | : 1945 |
Genre | : Copper mines and mining |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 788 |
Release | : 1911 |
Genre | : Mineral industries |
ISBN | : |
Author | : United States. Bureau of Mines |
Publisher | : |
Total Pages | : 104 |
Release | : 1980 |
Genre | : |
ISBN | : |
Author | : Paul G. Marinos |
Publisher | : CRC Press |
Total Pages | : 346 |
Release | : 1997 |
Genre | : Technology & Engineering |
ISBN | : 9789054108818 |
This fourth volume of five from the June 1997 conference was much delayed (the first four volumes were published in 1997). It comprises 23 special lectures solicited for the conference on various aspects of problematic soils, natural and man-made hazards, urban and regional planning, waste disposal, mines and quarries, large engineering works, and protection of geological, geographical, historical, and architectural heritage. There is no subject index. Annotation copyrighted by Book News Inc., Portland, OR
Author | : United States. Congress. House. Committee on Interior and Insular Affairs. Subcommittee on Energy and the Environment |
Publisher | : |
Total Pages | : 676 |
Release | : 1988 |
Genre | : |
ISBN | : |
Author | : United States. Army. Corps of Engineers |
Publisher | : |
Total Pages | : 438 |
Release | : 1976 |
Genre | : |
ISBN | : |