Device for determining Q, S and T values in combined mode

Abstract

The invention discloses a device for determining Q, S and T values in a combined mode, and belongs to the technical of mine safety. The device comprises a spiral drill pipe system, a drilling cutting collecting bag with holes, a gravity sensor, an air pump and a data collector. The spiral drill pipe system comprises a first spiral drill pipe and auxiliary spiral drill pipes connected with the first spiral drill pipe, a hollow cylinder is arranged in the middle of an inner cavity of the first spiral drill pipe, chucks are arranged on the inner wall of the middle of the cylinder and used for fixing the bottom end of a piston, a piston cavity is formed in the front end of the piston, formed by a wind resisting sleeve and the first spiral drill pipe in a surrounding mode and matched with the piston, and a temperature sensor is arranged at the position, adjacent to the outer wall and the cavity of the first spiral drill pipe, inside the wind resisting sleeve. An air feeding pipe is arranged on the inner wall of the first spiral drill pipe and communicated with the cylinder, a measuring pipe is further arranged inside the inner cavity of the first spiral drill pipe and penetrates through the cylinder and the piston, and a hole sealing device is arranged at the tail of the last auxiliary spiral drill pipe section. The drilling cutting collecting bag with the holes is arranged on the gravity sensor, the air pump is connected with the air feeding pipe, the data collector is connected with the tail of the measuring pipe, and the device is suitable for prediction in prevention of mine outburst.

Description

Technical field [0001] The invention belongs to the technical field of mine safety, and in particular relates to a device for joint determination of QST value. Background technique [0002] As the main energy source of our country, the development of coal and the safety of coal mines have always been research hotspots. However, the occurrence and mining conditions of underground coal seams are complex, and the gas content of coal seams in my country is generally high. More than 50% of the coal seams are high gas coal seams, and high outburst mines account for 44% of the total number of mines in the country. Coal and gas outbursts are serious and have a high risk factor. Disaster accidents caused by coal mine gas explosions and high-temperature operations are not uncommon. Therefore, coal mine units must carry out outburst predictions and take effective control measures. [0003] At present, there are many methods used to predict the outburst risk of coal and gas in underground coa...

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Problems solved by technology

[0004] In order to overcome the shortcomings in the prior art that the drilling tools cannot be sealed and the Q, S, and T values ​​need to be measured separately, the present invention provides a device for jointly measuring the QST value, which can realize the measurement of the Q value by sealing the hole. A single device realizes the combined determination of the three values ​​of Q, S, and T

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