Mine working face inter-lane seismic wave CT detection method

Abstract

The invention discloses a mine working face inter-lane seismic wave CT detection method which is a highly precise detection method for a geologic anomalous body in the mine working face, namely, seismic wave CT detection which is similar to medical CT and relates to a practical technique by taking the coal mine coal face as a research object and utilizing an upper lane and a lower lane for CT detection. An observation system relates to the relative relationship between a trigger point and a receiving point in space, and generally, the trigger point (adopting mining explosive as a seismic focus) is arranged at one lane, and the receiving point is arranged at another lane, and the observation mode of 'one-trigger, multi-receiving, and one-explosion, one-release' is adopted. After a coordinate system is established, the coordinate parameters of each point of the observation system are determined, and inversion calculation is conducted by utilizing an inter-lane seismic wave CT tomography technique, thus obtaining seismic velocity equal CT inversion slice in the working face so as to accurately and effectively judge the geological structure and the anomalous body trace in the working face. The method has better pertinence to the geological structure and the interpretation of anomaly thereof, and can provide reliable technical parameters for safe production in mines. The method broadens the application scope of the seismic wave CT detection technique and improves the accuracy for geologic anomalous body detection in the mine working face.

Description

Technical field: [0001] The invention relates to an in-plane geological anomaly detection technology in a mine working face, in particular to a mine shock wave CT detection technology for detecting geological anomalies such as faults, gangue, coal thickness variation areas, collapsed columns and the like in the working face. Background technique: [0002] In the process of coal mine production, especially the continuous application of new mine comprehensive mechanized coal mining methods, the requirements for the production and exploration data of coal mines are getting higher and higher. Coal mine safety production requires "one connection and three defenses". The "three defenses" mentioned here refer to waterproof, fire prevention and gas prevention; "one pass" refers to ventilation. To achieve these points, we must first understand the mining geological conditions in the mine (such as faults, folds, broken zones, gangue, coal thickness change areas, collapsed columns, st...

AI Technical Summary

Problems solved by technology

Conventional ground 3D seismic exploration can only resolve faults with a drop greater than 5m in the working face, and the position often has a swing amplitude greater than 10m; other underground geophysical methods are often affected by metal supports, water pipes, metal conductors, power equipment, Objective factors such as various cables, especially telephone lines and signal lines that are connected to the ground, will cause great interference to the signal

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