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为降低由环境因素引起的地面噪声,定点形变观测工作已逐步移向硐室和钻孔。新仪器的灵敏度一般在10~(-8)(地球物理精度)以上,能观测到固体潮汐应变。但国内诸多定点形变台站的高精度仪器无良好观测条件匹配的问题相当严重。其中,设置仪器的基岩地质条件对观测的影响是根本性的。目前选址工作中通用的常规地质调查,大都凭个人经验的目测,带有极大的主观因素,其结论是定性的,不能满足定点形变观测工作的要求。因此,需要寻找新的方法。目前广泛应用于工程地质的“岩体声波探测技术”(又称“岩石
In order to reduce the ground noise caused by environmental factors, the fixed-point deformation observation has gradually moved to the chamber and borehole. The sensitivity of new instruments is generally above 10 -8 (geophysical accuracy), can be observed in solid tidal strain. However, many domestic fixed-point deformation station high-precision instruments without good observation conditions match the problem is quite serious. Among them, the setting of the instrument bedrock geological conditions on the impact of the observation is fundamental. At present, conventional geologic surveys generally used in site selection work mostly rely on the visual inspection of personal experience with great subjective factors. The conclusion is qualitative and can not meet the requirements of fixed-point deformation observation. Therefore, we need to find new ways. Currently widely used in engineering geology “rock sound wave detection technology” (also known as "rock