An advanced detection method based on channel waves in underground coal mines
A technology of advanced detection and channel wave, which is applied in the direction of electromagnetic wave detection, can solve the problems of controversies in detection accuracy and effect, short detection distance and controversies in detection effect of ground radar method, and reduce roadway surface waves and diffracted waves The influence of the detection distance, the effect of improving applicability and accuracy
Active Publication Date: 2018-08-31
北京中矿大地地球探测工程技术有限公司
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[0003] At present, the geophysical methods used for advanced detection of coal mine roadways include electrical methods and seismic methods, among which electrical methods include direct current methods, transient electromagnetic methods and geological radar methods. The technical system of direct current method is relatively mature, but the detection effect is still controversial. ; The advanced detection of transient electromagnetic method is a quasi-full space detection, which is more sensitive to low-resistance objects, but due to the influence of electromagnetic interference, full space effect, volume effect and detection blind area, the detection accuracy and effect are controversial; the detection distance of geological radar method is short , and is greatly affected by electromagnetic interference
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[0028] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0029] The embodiment is that in a typical geological and geophysical 3D model containing coal, containing roadways and faults, the physical parameters of the theoretical model are shown in Table 1, and the channel wave seismic records obtained by numerical simulation shown in Table 1, the adopted geological and geophysical model is The typical advanced detection model of coal roadway includes a roadway and a fault with a strike angle of 30° with the roadway axis, the fault throw is 1 / 2 tim...
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The invention relates to a slot wave advance detection-based TVSP scanning method. The slot wave advance detection-based TVSP scanning method includes the following steps that: direct slot wave field and reflection slot wave field separation is performed; pick points of direct slot waves and reflection slot waves, which have large Airy phase peak values, are removed; Airy phase velocity va is calculated; a vertical distance h from a seismic origin to a fault and the strike angle Alpha of the fault are scanned; and a fault point dc in front of the center line of a final roadway can be obtained through using a formula. According to the slot wave advance detection-based TVSP scanning method of the invention, the Airy phase information of the direct slot waves and the reflection slot waves is fully utilized, so that geologic structures such as minor faults developed in a coal seam can be effectively detected. The method has the advantages of long detection distance, high resolution, strong anti-jamming capability, high computational efficiency, high speed and accurate positioning results, and can assist in effectively reducing the influence of roadway surface waves and diffracted waves.
Description
technical field [0001] The invention belongs to the mine safety technical field of coal mine roadway excavation, and is mainly used for accurately detecting geological anomalies such as small faults, collapse columns, goafs and scour zones in front of coal mine roadway faces, and specifically relates to a channel wave-based advance detection method. Background technique [0002] Geological structures existing in coal seams, such as small faults, subsidence columns and scour zones, etc., seriously threaten the safe production of coal mines. Production accidents such as landslides, roof falls, water inrush, and gas outbursts have caused huge economic losses to coal mine production and seriously endangered the lives of coal mine personnel. Planning and governance work, so as to ensure the safe production of coal mines is one of the main tasks of coal production enterprises. [0003] At present, the geophysical methods used for advanced detection of coal mine roadways include ...
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IPC IPC(8): G01V3/12
CPCG01V3/12
Inventor 李志勇何良
Owner 北京中矿大地地球探测工程技术有限公司