Method and device for measuring the distance between coal uncovering roadway and coal seam

Abstract

The embodiment of the invention provides a method and a device for measuring the distance between a coal uncovering roadway and a coal seam. The measuring device comprises a seismic source and N sensors which are disposed between the seismic source and the tunneling work surface of the coal uncovering roadway and are in the same line as the seismic source, and the line is parallel to the center axis of the coal uncovering roadway. The distance from the tunneling work surface to the coal seam is acquired by measuring first propagation time when surface waves generated by the seismic source and propagated along the ground plane of the coal uncovering roadway to the tunneling work surface reach the sensors, second propagation time when the sensors receive the surface waves reflected back by the tunneling work surface, third propagation time when transverse waves received by the sensors and reflected back by the coal seam reach the sensors, and the distance between each sensor and the tunneling work surface. By adopting the method and the device provided by the embodiment of the invention, the measurement accuracy and the reliability of measurement results can be improved. As the implementation of the embodiment of the invention is far away from the tunneling work surface of the roadway, normal construction is ensured.

Description

technical field [0001] The invention relates to a coal seam distance measurement technology, in particular to a method and a device for measuring the distance between a coal digging roadway and a coal seam. Background technique [0002] The coal-exposing roadway is a roadway that is excavated into the unmined coal seam. Because the coal-exposing roadway is generally the first roadway to contact and open the coal seam in the mining area, if the gas-containing coal seam is not handled properly, the high-pressure gas in the coal seam can easily break into the roadway, causing major safety accidents. In order to ensure the safety of the coal mining process, when the roadway is close to the coal seam, the distance between the head of the roadway (the driving face in underground engineering construction is called the head) and the coal seam is the most important parameter for the selection of safety measures. [0003] In order to determine the distance between the head of the roa...

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Problems solved by technology

[0005] The embodiment of the present invention provides a method and device for measuring the distance between the coal mining roadway and the coal seam, so as to overcome the problems of low reliability of the measurement results, affecting production and resulting in low practicability

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