Method for coal rock recognition
A device for coal rock recognition while drilling is disclosed. The device includes an elemental analyzer arranged on a drill pipe. A coal rock recognition information monitoring panel is connected to the elemental analyzer by a data cable. A circuit board is arranged in the elemental analyzer and a processor mounted on the circuit board. A detection head is connected to the circuit board and arranged on a side wall of the elemental analyzer. The detection head includes a detector and an X-ray tube.
1 . A method for coal rock recognition while drilling based on an elemental analyzer, the method comprising:
installing a coal rock recognition information monitoring panel on a drilling well;
connecting the coal rock recognition information monitoring panel to a drill pipe through a data cable;
driving, by a motor, the drill pipe to drill and punch a hole;
after drilling for a certain distance, controlling a drill bit to stop drilling and starting the elemental analyzer for coal rock recognition and detection;
then starting the motor to drive the drill pipe to rotate by 180° to drive the elemental analyzer to rotate;
afterwards, irradiating X-rays to a wall of a borehole using an X-ray tube thereby exciting carbon, silicon and unknown elements in coal rock to be detected to generate secondary X-ray reflection;
collecting energy and wavelength of emitted secondary X-rays by a detector;
transmitting the collected energy and wavelength to a processor;
comparing corresponding elements one by one through corresponding energy and wavelength to determine elements with corresponding energy and wavelength;
detecting again and transmitting data to the coal rock recognition information monitoring panel through the data cable; and
displaying and recording drilling data on the panel in real time.
2 . The method according to claim 1 , further comprising, after completing a set of tests, continuing to drill for a certain distance and carrying out the coal rock recognition.
3 . The method according to claim 1 , wherein the method is repeatedly performed until the drilling is finished.
4 . The method according to claim 1 , wherein a lower end part of the drill pipe is provided with the drill bit, the elemental analyzer is a cylindrical structure for connecting the drill pipe and the drill bit, and a rotating outer diameter of the elemental analyzer is less than that of the drill bit.
5 . The method according to claim 4 , wherein:
the drill pipe is a directional cable drill pipe;
an orifice channel for laying the data cable is formed in the drill pipe; and
the data cable comprises a data transmission line and a current delivery line configured to supply power and transmit a signal to the elemental analyzer.
6 . The method according to claim 5 , wherein:
a side wall of the elemental analyzer is provided with a reserved groove for installing the detector and the X-ray tube;
a wear-resistant protective film is arranged outside the reserved groove;
the detector and the processor are connected to a circuit board;
detection data collected by the processor is provided to the coal rock recognition information monitoring panel through the data cable; and
the coal rock recognition information monitoring panel comprises a host and a display.
7 . The method according to claim 6 , wherein an end face of the elemental analyzer is provided with a line hole for connecting the data cable.