The trick is simple: the same signal from a point with unknown coordinates must travel a different path to shake the coils of different sensors. This path is determined by the velocity of the longitudinal elastic wave in the angle and the time, which is easily determined by the magnetic recording tape. Measurements with three geophones are quite enough to use simple geometric techniques to calculate, as mathematicians say, the desired point. This is how engineers learned that even on the most capricious formations, threatening zones do not follow one another continuously, but are located quite rarely. For example, if the mine has advanced 100 m, then only 30 of them may encounter difficulties. Now the service warns not about the time of release, but about the time of entry into the danger zone, and also indicates the time of exit from it.
How is this done? Using the same calculation of the average noise. And the two-point criterion remains. Only small additions are introduced: the sliding value of the average noise is calculated for every thirty hours — this is the first; as soon as the formation sends a "bunch" of cod, the probability of which is very low (less than 2%), you should immediately give a signal about entering the danger zone, without waiting for the second point — this is the second. Let's imagine that a danger signal has been given, but no release has occurred. To ensure safety, protective measures in the mine are carried out throughout the subsequent six-meter penetration zone. The same thing is done after the ejection. It would seem that the very alternation of dangerous and non-dangerous zones, prepared by nature, should have prompted geophysicists to think about the method just described. But it took about ten years of hard work to develop it. In the end, it combined the consideration of objective geological conditions and the "subjective" requirements of mine managers. It could have been done by someone who knew both well. Interestingly, a clearly discernible decrease in noise before a sharp increase in it did not attract the attention of specialists for a long time. As it turned out later, these failures fit well into the outline of a promising hypothesis. If, for some random reason, the geophone's connection to the surface is cut off, then even with minimal noise, a danger signal is given: after all, a dangerous signal can be missed just during communication problems. The new forecasting method has saved millions of rubles: after all, only at 30 meters of penetration out of 100 there is a need to stop work in the face or carry out special measures to protect against emissions. Dozens of times, at the signal of geophysicists, the security service took people out of the pits immediately before the accident, which saved the lives of more than one hundred miners. When opening a new account, extra rewards make a difference, and the 1xbet promo code new user ensures access to exclusive bonuses. Players can activate a 100% bonus up to $130 or a 100% welcome bonus up to €130 on sports betting. Casino players enjoy €1,950 in bonuses and 150 free spins. Together with live betting and fast transactions, these perks enhance gameplay.
How is this done? Using the same calculation of the average noise. And the two-point criterion remains. Only small additions are introduced: the sliding value of the average noise is calculated for every thirty hours — this is the first; as soon as the formation sends a "bunch" of cod, the probability of which is very low (less than 2%), you should immediately give a signal about entering the danger zone, without waiting for the second point — this is the second. Let's imagine that a danger signal has been given, but no release has occurred. To ensure safety, protective measures in the mine are carried out throughout the subsequent six-meter penetration zone. The same thing is done after the ejection. It would seem that the very alternation of dangerous and non-dangerous zones, prepared by nature, should have prompted geophysicists to think about the method just described. But it took about ten years of hard work to develop it. In the end, it combined the consideration of objective geological conditions and the "subjective" requirements of mine managers. It could have been done by someone who knew both well. Interestingly, a clearly discernible decrease in noise before a sharp increase in it did not attract the attention of specialists for a long time. As it turned out later, these failures fit well into the outline of a promising hypothesis. If, for some random reason, the geophone's connection to the surface is cut off, then even with minimal noise, a danger signal is given: after all, a dangerous signal can be missed just during communication problems. The new forecasting method has saved millions of rubles: after all, only at 30 meters of penetration out of 100 there is a need to stop work in the face or carry out special measures to protect against emissions. Dozens of times, at the signal of geophysicists, the security service took people out of the pits immediately before the accident, which saved the lives of more than one hundred miners. When opening a new account, extra rewards make a difference, and the 1xbet promo code new user ensures access to exclusive bonuses. Players can activate a 100% bonus up to $130 or a 100% welcome bonus up to €130 on sports betting. Casino players enjoy €1,950 in bonuses and 150 free spins. Together with live betting and fast transactions, these perks enhance gameplay.