Regional impact danger level and domain identification method based on seismic source parameter inversion

Abstract

The invention discloses a regional impact danger level and domain identification method based on seismic source parameter inversion. The method comprises the following steps of (1) establishing a target region space coordinate system and screening mine seismic data, (2) establishing an index system for evaluating the impact danger level of the target region, wherein the index system comprises a strength index Q and a dispersion index H, (3) calculating an evaluation index value D of the impact danger level of the target region according to the following formula, (4) judging the impact danger level of the target region according to the evaluation index value D of the impact danger level of the target region, wherein the larger the D value is, the higher the danger level is, and (5) judgingan impact danger region according to the relationship between the closest distance between the center of the seismic source and the roadway and the radius of the seismic source, and formulating a prevention strategy according to the danger level and region of the target region. According to the method, the seismic source parameters are comprehensively utilized to perform impact danger level and domain prediction, the obtained result is convenient to implement on site, and the method established by the invention also has the characteristics of clear physical significance and suitability for programming to realize intellectualization.

Description

technical field [0001] The invention relates to a method for identifying hazard levels and boundaries of rock bursts, in particular to a method for identifying regional impact hazard levels and boundaries based on seismic source parameter inversion for underground microseismic monitoring in coal mines. Background technique [0002] The depth of coal mining in my country is rapidly increasing at a rate of 10-25m per year, resulting in a sharp increase in the stress level of the original rock around the mining space. In addition to the complexity of coal seam occurrence, coal-rock dynamic disasters represented by rock bursts have become obstacles to efficient coal mining. one of the key factors. The prevention and control of rock bursts, especially the accurate detection of rockburst dangerous areas, is one of the world's difficult problems. The geophysical method represented by microseismic monitoring can monitor the shock hazard area in real time and on a large scale, and th...

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Problems solved by technology

[0003] At present, scholars at home and abroad have proposed many microseismic early warning indicators, such as energy, frequency, space-time diffusion, apparent stress, apparent volume, spatial concentration, etc., but the above indicators realize early warning through abnormal changes in index values, such as "abnormal changes in index values". , "High or low value anomalies", only judged from qualitative aspects, resulting in low prediction efficiency

In addition, active and passive CT inversion based on microseismic, which has developed rapidly in recent years, has achieved good results in the detection of shock hazard areas, but its inversion period is long, and active inversion requires manual firing and wiring (resulting in increased cost and labor intensity). Interference with production has become one of the main problems restricting its development

At the same time, some typical mining areas of Poland and China have been observed to have low-energy mine shocks (energy less than 10 4 J) Inducing shock events, but high-energy mine shocks (energy greater than 10 4 J) did not induce a shock event, which is also one of the main problems that lead to an increase in the false alarm rate of monitoring and early warning

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