Three-component multiwave reflection three-dimensional earthquake advanced detection method for coal roadway tunneling geologic structure

Abstract

The invention discloses a three-component multiwave reflection three-dimensional earthquake advanced detection method for a coal roadway tunneling geologic structure. Shot points are distributed in a coal seam in front of a head-on face of a roadway to excite seismic waves; three-component geophones are arranged in the coal seams on the two sides of the wall of the roadway and the roof and the floor of the roadway; the three-component geophones distributed in the coal seams on the two sides of the roadway receive channel waves reflected by the structures in the coal seams, and the three-component geophones distributed in the roof and the floor of the roadway receive p-waves reflected by the structure in surrounding rock of coal seams in the roof and the floor; three-component multiwave reflected signals are processed and analyzed so that three-dimensional accurate advanced detection can be carried out on the geologic structure in front of the head-on face of the tunneled roadway. According to the three-component multiwave reflection three-dimensional earthquake advanced detection method for the coal roadway tunneling geologic structure, accurate explanation of a three-dimensional total-space position of structures such as faults, collapse columns and goafs in front of the head-on face of the coal roadway through advanced detection by means of the reflected signals generated by seismic waves on the structural surface is achieved. The method has good application prospect in roadway structure advanced detection of the underground coal mines and working surface structure detection.

Description

technical field [0001] The invention belongs to the technical field of exploration, and in particular relates to a three-component multi-wave reflection three-dimensional seismic advanced detection method for coal roadway excavation geological structures. Background technique [0002] Coal has always been the main energy source in my country, and my country's energy consumption will still be dominated by coal in the future. The geological conditions of coal seams in my country are poor, the structure of coal-bearing strata is complex, and the degree of exploration of coal resources is low. With the continuous increase of coal mining depth and the acceleration of tunnel engineering, the advanced detection method of coal tunnel excavation is difficult to meet the needs of deep mining and rapid development. Construction has resulted in frequent coal mine accidents. Coal mine safety accidents have become the main factor restricting the healthy development of my country's coal in...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a three-dimensional seismic advanced detection method for three-component multi-wave reflection structures in coal roadway excavation, aiming to solve the problem that the existing technology is based on the two-dimensional seismic wave propagation theory, and cannot accurately explain the three-dimensional spatial position and development scale of the structure , and can only detect the structure of the coal seam, the reflected channel wave detection only applies the horizontal (SH) component signal in the channel wave, and does not make full use of the three-component signals of other wave types in the full wave field

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