Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Collapse Area Can Be Predetermined

27.11.2002


Collapse in the mines can be foreseen in advance and the caving-in location and time can be identified. This has become possible due to the basic research carried out by scientists of the Ioffe Physical & Engineering Institute, Russian Academy of Sciences. Specialists of INTERUNIS company have undertaken to embody the above concepts in a prototype model of the device.

The system will consist of the ’’case on wheels’’ containing the computer and signal processing cards, and several sensors (16 sensors are planned to be installed in a test sample) connected to the computer by cables. The sensors will be immured in the walls of the mine or of any other underground depositary to be surveyed. The sensors catch elastic waves emitted by rock while breaking up, once a certain threshold value is reached, the device will produce danger warning and will indicate the exact location where the breaking-down is going to take place.

The researchers have proceeded from the fact that rock does not disrupt at an instant, the breaking-down is sometimes preceded by a lengthy period of strain accumulation. Initially, small bed joints are formed in different locations, the process can last pretty long, but when the bed joints become numerous, they immediately combine into large cracks and emit elastic waves of major energy - at this point, the process becomes critical. During major earthquakes, breakings dissect the earth surface and can be as long as several kilometers, but the way they are formed is similar to the one taking place underground. Therefore, the method of the threat area determination proposed by the physicists headed by professor Kuksenko is also applicable to forecasting major calamities.



Similar devices are being currently produced outside Russia, but such systems are intended for a narrow frequency band and can track the rock volume of 10 through 100 cubic meters. The Russian scientists are planning to develop a device which will analyze a wide band of waves and determine the break-up area at the distance of several kilometers. The device testing will be carried out in real-life environment: in a mine or an underground waste liquids depositary.

Tatiana Pitchugina | alfa

More articles from Earth Sciences:

nachricht AWI researchers measure a record concentration of microplastic in arctic sea ice
24.04.2018 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung

nachricht Climate change in a warmer-than-modern world: New findings of Kiel Researchers
24.04.2018 | Christian-Albrechts-Universität zu Kiel

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: BAM@Hannover Messe: innovative 3D printing method for space flight

At the Hannover Messe 2018, the Bundesanstalt für Materialforschung und-prüfung (BAM) will show how, in the future, astronauts could produce their own tools or spare parts in zero gravity using 3D printing. This will reduce, weight and transport costs for space missions. Visitors can experience the innovative additive manufacturing process live at the fair.

Powder-based additive manufacturing in zero gravity is the name of the project in which a component is produced by applying metallic powder layers and then...

Im Focus: Molecules Brilliantly Illuminated

Physicists at the Laboratory for Attosecond Physics, which is jointly run by Ludwig-Maximilians-Universität and the Max Planck Institute of Quantum Optics, have developed a high-power laser system that generates ultrashort pulses of light covering a large share of the mid-infrared spectrum. The researchers envisage a wide range of applications for the technology – in the early diagnosis of cancer, for instance.

Molecules are the building blocks of life. Like all other organisms, we are made of them. They control our biorhythm, and they can also reflect our state of...

Im Focus: Spider silk key to new bone-fixing composite

University of Connecticut researchers have created a biodegradable composite made of silk fibers that can be used to repair broken load-bearing bones without the complications sometimes presented by other materials.

Repairing major load-bearing bones such as those in the leg can be a long and uncomfortable process.

Im Focus: Writing and deleting magnets with lasers

Study published in the journal ACS Applied Materials & Interfaces is the outcome of an international effort that included teams from Dresden and Berlin in Germany, and the US.

Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia...

Im Focus: Gamma-ray flashes from plasma filaments

Novel highly efficient and brilliant gamma-ray source: Based on model calculations, physicists of the Max PIanck Institute for Nuclear Physics in Heidelberg propose a novel method for an efficient high-brilliance gamma-ray source. A giant collimated gamma-ray pulse is generated from the interaction of a dense ultra-relativistic electron beam with a thin solid conductor. Energetic gamma-rays are copiously produced as the electron beam splits into filaments while propagating across the conductor. The resulting gamma-ray energy and flux enable novel experiments in nuclear and fundamental physics.

The typical wavelength of light interacting with an object of the microcosm scales with the size of this object. For atoms, this ranges from visible light to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

IWOLIA: A conference bringing together German Industrie 4.0 and French Industrie du Futur

09.04.2018 | Event News

 
Latest News

Quantum Technology for Advanced Imaging – QUILT

24.04.2018 | Information Technology

AWI researchers measure a record concentration of microplastic in arctic sea ice

24.04.2018 | Earth Sciences

Complete skin regeneration system of fish unraveled

24.04.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>