Electric calculating precise time delay interference shock eliminating blasting method

Abstract

The present invention disclosed an electronically-calculated precision-delayed interference shock-damping blasting method. Said method uses adjacent two blastholes are a group, and utilizes actually-measured blast synthetic wave and composition wave as basic data, and utilizes computer to make precision calculation to obtain accurate delay time for making next blasting, and utilizes the interference to attain the goal of damping shock.

Description

technical field [0001] The invention relates to a blasting method, in particular to a computer-calculated precise time-delay interference damping blasting method capable of reducing the vibration of group hole blasting to below the vibration of single hole blasting. Background technique [0002] In the existing time-delay interference shock-absorbing blasting technology, there is the Fourier inverse transform method mentioned in Chinese patent ZL97199355.6. In the medium and high-frequency seismic waves of soil-rock step blasting, short-time-delay single holes are extracted for interference shock absorption. wavelet, it is required to accurately determine the delay between holes. When the actual detonation time difference of the detonator exceeds the nominal value of 1ms, the calculation error will completely cover the true value, and the true solution of the wavelet cannot be obtained. In addition, the inverse product method mentioned in the above-mentioned patent, when bla...

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Problems solved by technology

[0002] In the existing time-delay interference shock-absorbing blasting technology, there is the Fourier inverse transform method mentioned in Chinese patent ZL97199355.6. In the medium and high-frequency seismic waves of soil-rock step blasting, short-time-delay single holes are extracted for interference shock absorption. It is required to accurately determine the delay between holes. When the actual detonation time difference of the detonator exceeds the nominal value of 1ms, the calculation error will completely cover the true value, and the true solution of the wavelet cannot be obtained.

In addition, the inverse product method mentioned in the above-mentioned patent, when blasting soil-rock steps, due to the high main frequency of seismic waves, although the actual detonation error is more relaxed in the short-delay detonation, when the actual detonation time difference error of the detonation system exceeds 1ms Afterwards, in addition to the first wave of the main shock phase, the later time-history fluctuations have also diverged

It can be seen that when the computer extracts the single-hole wavelet from the synthetic wave of interference and shock absorption, the accuracy of its algorithm depends on the wave frequency, correlation, detonation network and equipment, and time-history accuracy of the test system determined by soil and rock geology. And the length of the delay, etc., without these or the successive decomposition method of the relevant patent and the calculation of the above-mentioned algorithm to extract the wavelet may fail

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