基于六向压应力传感器流变应力恢复法的地应力测量

流变应力恢复法是针对深部具有流变性的软弱围岩而提出的一种地应力测量方法，该方法采用在巷道围岩中钻孔埋设压应力传感器的方式来实现围岩原岩应力和扰动应力的测量。本文基于最新研发的光纤光栅式六向压应力传感器以及本安型光纤光栅解调仪，开展了传感器的室内标定试验。依托平煤股份八矿深部软岩巷道，开展了流变应力恢复法现场地应力测量，并与传统套芯应力解除法地应力测试结果进行对比分析，验证了基于六向压应力传感器流变应力恢复法地应力测试的准确性和可靠性。

In-situ Stress Measurement employing Rheological Stress Recovery Method Based on the Six-directional Stress Sensor

The rheological stress recovery (RSR) method was proposed to measure the stress of the weak rock masses with rheological property in the depth. It was carried out by embedding the stress sensors into the borehole of surrounding rock to obtain the in-situ stress and induced stress. Based on the newly developed six-directional fiber Bragg grating stress sensor and the intrinsic safety fiber Bragg grating demodulation instrument, the calibration test of the stress sensor was carried out. On the basis of deep soft rock roadway in Pingdingshan No.8 coal mine, in-situ stress measurement by rheological stress recovery method was carried out, and the in-situ stress measurement results were compared and analyzed with the traditional overcoring method, which verified the accuracy and reliability of in-situ stress measurement by rheological stress recovery method based on six-directional stress sensor.