Khakassia, December 14, 2012, 12:27 — Can the underground industrial explosions in Khakassia trigger an earthquake? In theory — no, say experts on technology management and environmental supervision Rostekhnadzor PX. However, in practice, full warranty, as the Bender, can give only an insurance policy.
But seriously about the guarantee, an accident, for example, in 2009, the power plant, there are also situations in quite regular. Press-service of the company in full blows of the station in normal mode — and then the second unit, vibrating suspiciously long time, breaks mount. As a result — 75 in no way responsible lives.
On Monday, in the Krasnodar region was recorded earthquake, with its epicenter 34 km northwest of the city of Novorossiysk magnitude 4.8 points. Strong tremors were recorded in Anapa. Residents of Anapa and Novorossiysk reported tangible tremors. People ran out just in case of residential buildings.
Estimated to seismologists, the epicenter of the earthquake was 33 km from Anapa on the Black Sea. According to preliminary data, the epicenter of the coastline, two kilometers out to sea, and for Supsehskim rural district.
On Anapa city interet forum message: "First there was a terrible roar and the growing impetus, such was the feeling that the house from side to side rolls over, but the dogs on the street silent. Although it is said that animals feel beforehand. Yes, and the light we have about ten minutes before the earthquake cut off and outdoors winter, cold, about 15 minutes after the on again. "
"…You do not think about why earthquakes occur where pipes are pulling the "South Stream". For example, the same tremors occur at regular intervals in the Krasnoyarsk region and Khakassia. COINCIDENCE?
This is just a guess, but, all the same .. gives thought to think ".
Another resident of Anapa recalls: "And when will the 6 points, as in the 60's, it will be too late!!!! Why was there no warning? ".
And here's another interesting fact, which reported IA "Khakassia" November 22, about the next earthquake in Tuva citing Geophysical Survey SB RAS. The next day, the press service of Russia's EMERCOM for Tuva denied this information: the last day of seismic events in Tuva is not registered! What is it? It turned out that Automatic confused aftershock with an underground explosion in the Kemerovo region!
Is there a logical connection between the industrial explosion and subsequent aftershocks followed him? On this and other issues correspondent of IA "Khakassia" said Peter Nikulin, head of mining inspection management Rostekhnadzor PX.
— Aftershock — repeated seismic jolt lower intensity compared to the main seismic shock. Strong earthquakes are always accompanied by numerous aftershocks. The number and intensity over time are reduced and the duration of symptoms can last for months.
Especially likely strong aftershocks in the first hours after the main shock. During the main shock of the earthquake — plastic (and brittle) deformation of crustal rocks in the earthquake rigid crustal plates shifted as a whole by tens of centimeters or even meters. In this case, the stresses in the source are reduced from maximum to minimum residual. But in the vicinity of the source voltage increases significantly (by shifting plates), sometimes bringing it to the very limit of the voltage stability. If you exceed the tensile strength and are aftershocks. As a result of the offset plate stresses increase, and at a great distance from the source (just as it is in the vicinity of the source). As a result of this increase the voltage on the plate boundary can come close to the ultimate strength of the crust around the perimeter, so that after the great earthquake — the offset along the border can take a series of induced earthquakes.
Based on the above, we can make a conclusion about the absence of communication between industrial explosions and aftershocks.
— What is the acceptable range of explosion, the units measured?
— Seysmoeffekt explosion depends on the rate of propagation of longitudinal and transverse waves in the array, depending on the elastic properties of rocks in the site of the explosion, and the point guard of the object. Seysmoeffekt explosion — expresses the intensity fluctuations of the array, depending on the intensity of the explosion energy. Massif is characterized by fluctuations in the amplitude and frequency of the transverse and longitudinal waves, caused by the explosion. Vibration amplitude, frequency and speed of propagation of transverse and longitudinal waves, caused by the explosion, for the different rock types are different.
— How to distinguish the industrial explosion of the earthquake?
— Regulations of the Federal Service for Environmental, Technological and Nuclear Supervision is not provided for the control and supervision of the earthquakes.
Explosions and earthquakes are different recordings waveforms, notably the presence of Rayleigh waves on the records of industrial explosions;
spectral ratio of the transverse and longitudinal waves for earthquakes are approximately the average values of 2 to 5, and for industrial explosions — a little more than 1;
Prolonged Fourier spectra in the case of earthquakes have a nucleus, which is the Fourier spectra of the explosions is not observed;
graphs of wavelet — transformation to join earthquake shear wave is much stronger since the longitudinal and for industrial explosions intensity arrivals of longitudinal and transverse waves is approximately the same.
— How safe for the residents of Khakassia industrial explosions?
— Industrial explosions — this is the usual method of mining in open pits and underground. In the commercial production is a series of small explosions in consecutive drilled holes in the rock, aimed at crushing rock. Formed at loosening rock dust settles, usually inside the excavation pit and benches. So do not say that blasting can cause dusting areas.
Calculations on the impact of development on air show that it will be minimal and will not exceed the established norms on the border of sanitary protection zone. These calculations are confirmed by the practice of many similar objects. Safety blasting depends on the professionalism of the workers who must work under the supervision of technical experts and organizations RTN.
In the history of mine "Montenegro" in 1959 and the section "Steppe" from 1994 with a total weight of explosives in a single blast, which amounted to 800 tons, the negative impact on the residents of Khakassia registered.
As they say, no comment.