Abstract:
In-situ stress is one of the most important influencing factors to underground raining. In Beiminghe iron mine, in order to obtain the distribution rule of in-situ stress and disturbance stress, the stress relief method by overcoring was used to measure the in -situ stresses and the MC model bore-hole stress gages was used to measure the disturbance stresses. In the fore measuring, the tecnique of improved hollow inclusion cells was adopted which can actualize complete temperature compensation. And all of these were very important to mining desing and security of production. The measuring results show that the insitu field of Beiminghe iron mine relies mainly on horizontal stress and the disturbance stress can be distinguished to stress decreasing zone, stress increasing zone and stress steadiness zone.