Method for quickly and precisely positioning passive mine focus

Abstract

The invention relates to a method for quickly and precisely positioning a passive mine focus. The method includes steps of (1), optimally arranging passive focus sensors based on numerical analyzing and monitoring results; (2), detecting events of the passive focus; and (3), positioning the passive focus based on travel time of P-waves. The step (3) particularly includes using existing geophysical parameters as a known condition and a constraint condition; solving equations to obtain results including origin delay time and focus coordinates according to the principle of least squares; judging reasonableness of the results after the equations are solved; adjusting input parameters if the results are unreasonable; computing again until a final reasonable solution is obtained; and accordingly determining coordinates of the passive focus. The method has the advantages that unreasonable and excessive excavation is stopped fundamentally, coal mining utilization rate is increased, re-exploration for distribution of gobs by a geophysical exploration mean is omitted for monitored areas, and cost is saved.

Description

technical field [0001] The invention belongs to the technical field of passive seismic source monitoring, and in particular relates to a method for quickly and accurately locating passive seismic sources in mines. The method can be widely used in the fields of monitoring cross-border illegal mining in small coal mines, microseismic monitoring in mines, geological disaster forecasting and the like. Background technique [0002] Due to historical reasons, there are many small coal kilns around large state-owned coal mines. Most of these small coal mines are self-employed. Their production technology and equipment are relatively simple, and the underground roadway has no support. They do not meet the conditions for safe production, and there are serious hidden dangers in safe production. Driven by profit, small coal mines carry out predatory and indiscriminate mining, and the coal recovery rate is only 10% to 15%, resulting in a large waste of resources; The service life has b...

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Problems solved by technology

[0003] In recent years, the state has intensified its efforts to rectify small coal mines and closed some illegal small coal mines, which has achieved good results. However, in the past, the "personnel monitoring" mode of on-site supervision was carried out by relying on coal mine safety production supervision and management personnel at all levels , there are still unavoidable deficiencies such as limited monitoring scope, controlled monitoring time, and small coal mine owners cheating their superiors and subordinates. , going through the motions, and the problems of "not being strict enough and not being implemented" are widespread, which eventually lead to the rampant activities of small coal mines, and the task of "cracking down on non-compliance" is still arduous

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