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应用微破裂向量扫描技术的必要条件是避免、去除、和压制干扰信号以获得较小振幅的随机记录,故其工程化中的核心任务是尽力提高记录数据中的有效信噪比;而最关键和基础性的环节是数据采集,这也是当前微震监测的最大问题.应用向量扫描的专用微震监测仪器应当适合地表接收具有剪切成分的微弱地震信号、可独立布设、和无线高速传输数据,以适应地表恶劣监测环境和对监测的常规合理要求.记录仪和检波器参数或性能,均应围绕这些要求设计和研制;特别的,检波器应具有较高的灵敏度、恰当的3D地面运动响应频率范围(较低的自然频率)、与大地高度耦合为一个整体的特性.在地表实施向量扫描的理想微震监测台网,作为努力方向,应当是:每个台点非常安静;台点尽可能接近目标;台点越多越好;和台点均匀分布并包围覆盖监测目标地表投影点(域).为满足向量扫描应用的必要条件、适合地面监测环境、并照顾到对监测方法的常规要求,除按理想微震监测台网的条件去努力外,实际应用时,台网布设原则应当是:(1)台点距诸如压裂车等强干扰源的近边界约在1 km;(2)排除监测区域内所有强干扰源影响范围后,以满足安静点数值定义布设台点;(3)台点距强干扰源的远边界,应服从安静点定义和越接近目标越好的原则.
The essential condition for applying the micro-ruptured vector scanning technique is to avoid, remove and suppress interfering signals to obtain a random record with a small amplitude. Therefore, its core task in engineering is to make every effort to improve the effective signal-to-noise ratio in the recorded data. And the basic link is data collection, which is the biggest problem of microseismic monitoring currently.Applied microtunnel scanning of vector scanning should be suitable for the reception of weak seismic signals with shear components, which can be independently arranged and wirelessly transmit data at high speed Adapt to the adverse surface monitoring environment and the normal and reasonable requirements for monitoring.Recorder and detector parameters or performance should be designed and developed around these requirements; In particular, the detector should have a high sensitivity, the appropriate 3D ground motion response frequency Range (lower natural frequency) coupled with the earth’s height as a whole feature Ideal microseismic monitoring network for vector scanning at the surface as an effort direction should be: each station is very quiet; the station is as close as possible Target; Taiwan points as possible; and Taiwan points evenly distributed and surrounded by the coverage of the monitoring target surface projection point (domain). To meet The necessary conditions for the application of volume scanning are suitable for the ground monitoring environment and take into account the general requirements for the monitoring method. In addition to working under the conditions of an ideal microseismic monitoring network, in practice, the principle of network deployment should be: (1) (2) After excluding all the sources of strong interference in the monitoring area, the station is defined according to the value of the quiet point; (3) The strong point-source distance Far boundaries of sources of interference should be subject to the definition of a quiet point and the closer to the goal the better principle.