Drill hole vector stress sensor for mine

Abstract

The invention relates to a drill hole vector stress sensor for a mine, which is strong, durable, convenient to install and capable of achieving omni-directional vector measurement. The drill hole vector stress sensor for the mine comprises a casing. A core body is arranged in the casing and provided with an integrated circuit module connected with the core body. The core body comprises a balance beam fixing support, and balance beam sensors are fixed on the balance beam fixing support and provided with force measurement nuts. Three balance beam sensors are fixed in a mode with 120-degree included angles formed between the balance beam sensors, and the integrated circuit module comprises two (analog to digital) A / D conversion modules and an electronic compass module which are respectively connected with the balance beam sensors. The casing is made of stainless steel materials. The core body and the integrated circuit module are arranged in the casing, and two ends of the casing are sealed by means of glue injection.

Description

1. Technical field: [0001] The invention relates to a stress sensor, in particular to a mine borehole vector stress sensor. 2. Background technology: [0002] In the background technology, in the coal mining industry, the mining of the coal seam causes the formation to deform. Blindly mining when it is not clear that the mining layer can bear the pressure will easily cause the coal seam to collapse due to the unbearable pressure of the upper layer, causing mine accidents and seriously threatening the property of the miners. and life safety. [0003] The mine borehole vector stress sensor is mainly used to measure the change of the stress of the reserved coal pillar in the coal mine, or to measure the stress change of the foundation pit rock mass or soil foundation before and after excavation. One of the equipment. [0004] At present, many enterprises and individuals at home and abroad have explored and studied the field of borehole stress measurement, and have successivel...

AI Technical Summary

Problems solved by technology

[0005] 1. It is easy to be damaged. Generally, the sensor core is designed with a strain gauge, which is easily damaged during the installation process;

[0006] 2. It is not easy to install, and the direction of the sensor is difficult to determine

Generally, during the installation process of the sensor, it is necessary to record the axial direction on the bamboo pole to determine the direction of the sensor. The operation is troublesome, time-consuming and labor-intensive.

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