Blasting pressure relief effect evaluation method based on microseismic signal waveform analysis

Abstract

The invention provides a blasting pressure relief effect evaluation method based on microseismic signal waveform analysis. The method comprises the following steps of: selecting a blasting point for performing a blasting pressure relief test on a working surface, receiving vibration signal waveforms by each vibration pickup, monitoring and recording, and counting the explosive load of the blasting test corresponding to all the vibration signal waveforms and the distance between the vibration pickup and the blasting point; preprocessing and transforming the blasting vibration signal waveforms to obtain the maximum instantaneous energy of the vibration signal; and establishing a relationship between the maximum instantaneous energy of the vibration signal and the corresponding explosive load and the distance parameter between the vibration pickup and the blasting point, analyzing the parameters by utilizing a statistical method, constructing an evaluation index of the blasting vibration effect, and quantitatively evaluating the blasting pressure relief effect. According to the blasting pressure relief effect evaluation method based on microseismic signal waveform analysis, the blasting pressure relief effect is evaluated, so that the evaluation is objective, reliable and accurate, and the condition that a traditional evaluation method taking seismic source energy as an evaluation parameter is large in error is avoided.

Description

technical field [0001] The invention relates to the technical field of coal-rock dynamic disaster prevention and control, in particular to a blasting pressure relief effect evaluation method based on microseismic signal waveform analysis. Background technique [0002] In recent years, the frequency and intensity of coal mine impact rock disasters have gradually increased, and the prevention and control methods for rock impact disasters have become more and more abundant. Among them, blasting pressure relief technology has been widely used as an effective prevention and crisis relief measure. Pressure mine. [0003] Blasting decompression will produce blast-induced vibration, which can be considered as the result of the medium response of the coal-rock mass caused by the dynamic disturbance at the blast source. It is also related to the physical and mechanical properties of the rock, the distribution of joints and fissures in the roof rock mass, the level of ground stress, a...

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Problems solved by technology

[0004] In the actual application process, the blasting pressure relief technology has the problem of only "exploding" but not "evaluating", that is, only implementing the blasting pressure relief measures, while ignoring the effect evaluation after blasting pressure relief, whether it really plays a role in pressure relief after blasting pressure relief Whether it can meet the requirements of prevention and relief of rock burst dynamic disasters, there is currently a lack of rapid and effective methods

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