论文信息 - Long-term stability of a new EFPI stress monitoring sonde installed in a brown coal mine in Poland

Long-term stability of a new EFPI stress monitoring sonde installed in a brown coal mine in Poland

In the Polish brown coal mine Belchatow deformation and stress behaviour are investigated to learn in early stage any reaction of this surface coal mine pit. These values are critical in regard of landslide risks as also important for the most economic excavation geometry. As already reported in GTMM 2002 conference in Karlsruhe, a standard stress monitoring station has been installed and first results have been reported. An important task is to get confident values not in high-precision but in long-term stability. In cooperation with my Polish colleagues and the BAM (German Federal Institute for Material Testing), Berlin, a new EFPI Stress Monitoring Station has been installed in this coal mine and first experiences and results have been reported.

[1] M Schmidt,et al. Fiber-optic extrinsic Fabry-Perot interferometer strain sensor with <50 pm displacement resolution using three-wavelength digital phase demodulation. , 2001, Optics express.

[2] Detlef Hofmann,et al. Geotechnical pressure cell using a long-term reliable high-precision fiber optic sensor head , 2005, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[3] Wolfgang R. Habel,et al. Fiber optic sensors for deformation measurements: criteria and method to put them to the best possible use , 2004, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.