Borehole stressmeter capable of accurately monitoring three-dimensional installation angle and use method thereof

Abstract

The invention discloses a borehole stressmeter capable of accurately monitoring a three-dimensional installation angle, which comprises a borehole stressmeter, an arc-shaped pressurizing plate is arranged on the borehole stressmeter, the arc-shaped pressurizing plate comprises an upper pressurizing plate and a lower pressurizing plate, an oil pressure pillow is arranged between the upper pressurizing plate and the lower pressurizing plate, a groove is formed in the upper pressurizing plate, a three-dimensional angle sensor is installed in the groove, a cable of the three-dimensional angle sensor is led out of the hole and then connected to a handheld angle monitor, and an angle sensor circuit board and a display screen are arranged on the handheld angle monitor. The invention provides the borehole stressmeter capable of accurately monitoring a three-dimensional installation angle, the change of the angle of the borehole stressometer in the pushing process can be displayed in real time, the borehole stressometer is convenient to install and use, the angle is fast and convenient to adjust, and an oil pressure pillow can be ensured to be in a horizontal state after the borehole stressometer is installed so as to measure the stress in the vertical direction; and the oil pressure pillow can be in a vertical state to measure the stress in the horizontal direction.

Description

technical field [0001] The invention relates to the field of rockburst stress monitoring in coal mines, in particular to a drilling stress gauge capable of accurately monitoring three-dimensional installation angles and a use method thereof. Background technique [0002] my country is a country rich in coal, poor in oil, and low in gas. With the exhaustion of shallow coal resources and the increase of deep mining (underground mining with a depth greater than 600m), the mine pressure has intensified, and rock bursts, etc. Disasters and accidents occur frequently. And with the increase of mining depth, this kind of disaster becomes more and more serious, and rock burst has become one of the most serious dynamic disasters faced by coal mines in our country. [0003] Rockburst is a dynamic phenomenon characterized by sudden, sharp and violent damage due to the release of deformation energy of the coal and rock mass around mine shafts and stopes, which is essentially caused by th...

AI Technical Summary

Problems solved by technology

Although the design requires that the connecting holes must be located in the same plane, due to the ubiquity of machining errors, as well as the bending and unevenness of the drilling, the oil pressure pillow of the drilling stress sensor in the 15-meter-deep hole is largely out of the horizontal plane , but at an angle with the horizontal plane

In this way, the real vertical stress and its change of the surrounding rock cannot be effectively measured, which is not conducive to the monitoring and early warning of the change of rock burst stress in coal mines, and is not conducive to the safe production of coal mines.

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