A coal seam water radio measuring instrument

Abstract

A coal bed water radio measurement instrument is characterized in that the coal bed water radio measurement instrument comprises a double-channel low-frequency and ultralow-frequency radiometer and two double-antenna sets; according to the double-channel low-frequency and ultralow-frequency radiometer, a first channel is a DICK type broadband total-intensity radiometric receiver, the 3db bandwidth of the DICK type broadband total-intensity radiometric receiver is 500Hz-6.5MHz, a second channel is 16-channel scanning resonance type total-power radiometric receiver, and the center frequency of a 16-channel scanning resonance tank is 200Hz-1.05MHz; the two double-antenna sets are a plate type double-antenna set formed by a planar antenna and a ferrite antenna and a tube type double-antenna set formed by a helical antenna and a ferrite antenna; the coal bed water radio measurement instrument further comprises an A / D converter, a displayer recorder, an anti-explosion ni-mh rechargeable battery pack, a DC / DC converter circuit and a high-precision voltage-stabilized power source.

Description

technical field [0001] The present invention relates to a coal seam water measurement device, in particular to a coal seam water radio measuring instrument, which uses the methods of radio astronomy modulation, full power and absolute calibration in radio astronomy to measure (water-containing) coal seam radio waves more accurately. The radiation intensity, azimuth and normal distance of the radiation source can distinguish the water content of the coal seam and determine the abundance of groundwater in different parts of the coal seam. Background technique [0002] Coal accounts for 70% of my country's energy structure. With the increase of coal mining depth and the expansion of mining scope, the tasks of gas explosion, coal outburst, roof collapse, coal mine dust and mine groundwater are getting heavier and heavier. As far as the prevention and control of mine groundwater is concerned, although there are methods and means such as surface geophysical prospecting and roadway...

AI Technical Summary

Problems solved by technology

How to measure the radio radiation of water-bearing coal seam, and use the radio radiation analysis to measure the water in the coal seam, the following factors need to be considered: first, there is almost no peak radiation in the radio radiation of the liquid; second, the radiation intensity of coal seam water is lower than the radio radiation intensity of coal seam gas , so higher overall gain, higher sensitivity, higher overall gain stability and stronger integration performance are required; third, there is no report on the radio radiation characteristics of coal seam water so far, and it is impossible to realize the measurement purpose Without greatly expanding the range of the received frequency band, the f max / f min Expanding from 40 to 500, quantitative changes lead to qualitative changes, which greatly increases the difficulty; finally includes the resulting fundamental changes in structure and circuits

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