Coal mine underground temperature measuring drill rod based on temperature measuring optical fiber and using method thereof

Abstract

The invention discloses a coal mine underground temperature measuring drill rod based on a temperature measuring optical fiber and a using method thereof. The drill rod comprises a drill rod body withthe interior communicated, wherein the end of the first end of the drill rod body is open; a detachable sealing part for blocking an opening is arranged at the opening of the second end of the drillrod body; a guide hole for the temperature measuring optical fiber to freely penetrate through is formed in the side wall of the second end or the sealing part; the free end, stretching into the drillrod body, of the temperature measuring optical fiber is detachably connected with a push block with the size smaller than the inner diameter of the drill rod body; the effective sectional area of thepush block accounts for 80% -95% of the sectional area of the inner diameter of the drill rod body; and a high-pressure fluid inlet pressurizing opening is formed in the side wall of the second end or the sealing part and communicated with an external fluid pressure source. According to the drill rod of the special structure, an optical fiber temperature measurer and the temperature measuring optical fiber are combined, the position of a high-temperature coal seam is determined by actually detecting the peak position of the temperature in a drill hole, meanwhile, drilling can be conducted, and multiple purposes of one drill rod are achieved.

Description

Technical field [0001] The invention relates to the field of temperature measurement of coal seams in coal mines, in particular to a temperature measurement optical fiber-based coal mine underground temperature measurement drill pipe and a use method thereof. Background technique [0002] In coal mine fire area monitoring, coal spontaneous combustion range determination, and early prevention, forecasting and other related projects, the collection of internal information in the fire area is the most critical technology. The current borehole temperature information in the fire zone has a very high guiding significance for the precise location of the local high temperature fire source. [0003] Currently commonly used borehole temperature measurement devices are mainly composed of thermal resistance / thermocouple temperature measurement probes, data transmission wires and display instruments. The wires for optical fiber temperature measurement mainly include armored wires and non-armo...

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Problems solved by technology

[0004] When armored wires are used, the hardness of the armored wires can be used to directly transport the temperature measuring probe into the borehole. The depth of delivery needs to be calculated manually. The mounting wire is not easy to carry, so most of the time it is only suitable for short-distance temperature measurement

Although non-armoured wires are easy to carry, when measuring temperature, it is necessary to tie the sensitive temperature probe and signal line to the hard steel wire with tape, and deliver the temperature probe into the drill hole, according to the number of tape winding points on the steel wire Calculate the depth; this process is complicated to operate, and as the steel wire goes deeper, it will make the steel wire easy to bend, and the bent steel wire will also affect the actual depth of detection

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