Study and Application of Hollow Inclusion Stress Measuring Technique

In order to improve measuring technique of hollow inclusion cell in mining, based on measuring system research, we improve the applicability of triaxial strain gauge, installing rod and drill bit in mining, and enhance the accuracy and stability of measurement. According to research results of in-situ geostress measurement system, we measure the in-situ stress in eastern main rail-tunnel and lower opening of ventilation in mining area Ⅱ-Ⅰin -750 level of Xuzhuang Coal Mine. It shows that the stress field of eastern mine is mainly horizontal tectonic stress field, and the roadway arranged along the east-west direction is under nearly vertical shear stress.