Under the action of the Earth’s inner dynamics, the lithosphere shapes different types of the Earth’s surface, and the crustal stress state and its dynamic change law are captured by the comprehensive observation technology of drilling crustal activity. It is an important way for human beings to und...

This paper briefly describes the theoretical basis of the DRY-1B capacitive component drilling strain gauge (drilling strain gauge). It discusses critical technologies such as micro-displacement sensing, noise reduction, temperature control, performance testing, and calibration. The strain gauge ach...

The article reviews the development of the volumetric borehole strain gauge. In response to the current problems of insufficient stability and bandwidth and low calibration accuracy of the volumetric strain gauge, a TY-2B-type small volumetric borehole strain gauge was developed with innovative impr...

Based on the strain data of three in-situ stress monitoring stations in different sections of the 1605 Qiongshan 7½ earthquake area, we studied the dynamic variations of in-situ stress and extracted the sudden stress changes recorded by them. We analyzed the in-situ stress variations and tectonic ac...

Dynamic disaster formation and triggering are closely related to the mechanical behavior of the regional stress field. The regional local stress field is continuously adjusted and changed under the effect of coal mining disturbance. In order to study the precursor response of regional stress field c...

The hydraulic fracturing in-situ stress testing technology was used to test two boreholes (500-meter and 520-meter deep) at the Taiyuan pumped storage power station in Shanxi Province. The in-situ stress state of critical areas was obtained, and the ground stress level, underground building layout, ...

In order to obtain the in-situ stress field characteristics and analyze tectonic stability in the Motuo key area of the eastern Himalayan syntaxis, the in-situ stress measurement of one in-situ stress hole and 11 test sections of the Xirang section of the Motuo fault zone were carried out by the hyd...

The Yalu River fault zone is an essential branch of the Tanlu fault system with intense present-day tectonic activity. Over 60 hot springs are exposed along the fault zone with abundant geothermal resources. In order to find out the present-day crustal stress state and fault activity in the Wulongbe...

We carried out hydraulic fracturing in-situ stress measurements in an 1881-m deep borehole at the Shuiwangzhuang gold deposit and obtained the variation law of deep in-situ stress with depth in the mining area. The measurement results show that the maximum principal stress has an increasing linear t...

The proposed 2000-meter-deep auxiliary shaft at the Xiling mine, Sanshan Island, Shandong Province, is an ultra-deep shaft construction project. Revealing the characteristics of the in-situ stress field in the shaft construction area is one of the necessary prerequisites for the design and construct...

As a control and regulating project, the hydropower station in the Yigongzangbu basin of Tibet plays a vital role in meeting the electricity demand of the Tibetan power grid. Identifying this hydropower station’s present-day in-situ stress environment and understanding the characteristics of in-situ...