micro seism

Design of a data-acquisition system for underground microseismic monitoring based on ADS7852;

基于ADS7852的微地震数据采集系统的设计

Analysis to the field application effect of inner well microseismic monitoring technique;

井间微地震监测技术现场应用效果分析

Application of correlation filter in processing of microseismic data;

相关滤波在微地震数据处理中的应用

Application of Microseismic Monitoring Method in Disaster Prevention of Underground Mine;

微地震监测技术在矿井灾害防治中的应用

Study of Microseismic Monitor System based on Virtual Instrument;

基于虚拟仪器的微地震监测系统研究

Research on micro seismic monitoring and measurement of overburden strata movement variation law in outcrop seam mining;

露头煤开采覆岩运动变异规律微地震监测研究

Micro seismic phenomenon is an important information before fracturing of rock mass;studies of micro seismic characteristics of the fracturing process of rock mass are of important significance for prediction of fracturing and destabilizing of rock mass and guaranteeing the safety of mine production.

微地震现象是岩体破坏失稳发生前给出的重要信息,研究岩体变形破坏过程的微地震特征对于预报岩体破坏、保证矿山安全生产具有重要意义。

Method of coherent filtering in frequency domain and polarization filtering in time domain for micro-earthquake data;

微地震资料频域相干—时间域偏振滤波方法

The paper adopted the technique of micro seismic monitoring.

本文采用微地震监测技术，根据煤与瓦斯突出前兆的声学信息，不仅接收微地震事件在顶底板传播过程中的信号，而且采集微地震事件在煤层中传播的槽波信号，通过对微地震波形信号的分析，找出微地震在突出前的活动规律及特征，利用时差定位和方向定位对震源点进行有效定位，从而使微地震技术在煤与瓦斯突出监测方面做到有效的预测预报。

Four fundamental methods are introduced,namely well temperature,ground potential survey,microearthquake and radioactivity isotope,which were used to monitor the fracture geometry of fractured coalbed methane wells in North China.

介绍了井温测试法、放射性同位素法、大地电位测试法和微地震测试法监测煤层水力压裂裂缝的基本原理。

He gave a slight start.

他微微地震动了一下。

Seismic phase separation technique of micro-seismic signal by polarization-position correlation

微地震信号的偏振—位置对比法震相分离技术

This apparatus eliminates the effects of microseisms.

这种仪器排除了微地震的影响。

Micro Seismic Monitioring Location Research of Coal and Gas Outburst;

微地震监测煤与瓦斯突出的定位研究

The Exploration on the Microseismic Data Acquisition Instrument Based on DSP;

基于DSP的微地震数据采集仪的研制

Microseismic Data Inversion Based on Ray Theoretical ForwardModeling;

基于射线理论模型的微地震资料反演

Preventing Coal Bump by Appling Microseismic Locating Monitoring Technology in Longwall Face;

微地震定位监测在采场冲击地压防治中的应用

Study on Micro Seismic Mode, Location of Rock Mass and Its Collapse Prediction;

岩体微地震的模式、定位及其失稳预报研究

Study on the Movement Rule of Overlying Strata of Colliery Stope by Microseismic Monitoring;

煤矿采场覆岩运动规律的微地震监测研究

Study on the Miroseismic Events and the Above Strata Movement Character in Luxi Coal Mine;

鲁西煤矿微地震事件与覆岩运动特征的研究

A Study of Microseismic Monitoring Technique and Application in Qinjiatun Oilfield;

微地震监测技术研究及在秦家屯油田的应用

Underground Microseismic Monitoring System in Real Time Based DSP Technology;

基于DSP技术的井下微地震实时监测系统

Earthquake dynamics-from macroscopic to microscopic:examples learnt from the 1999 Chi-Chi earthquake in Taiwan

地震动力:由巨观到微观——1999年台湾集集地震

An earthquake with a magnitude of less than 2.0 is so slight that usually only a seismometer can detect it.

小于2.0震级的地震非常轻微，通常只有地震检波器才能探测到。

A faint earth tremor caused by natural phenomena, such as winds and strong ocean waves.

微震，脉动由自然现象，如风或强海波引起的轻微地球震动

Earthquakes along spreading centers tend to be very mild.

沿扩展中心的地震往往很轻微。

Along some active faults we can see clear alignments of microearthquakes.

微震清晰地沿着某些活动断层排列着。

Study of design of the network system for earthquake micro precursor forecast

地震微观前兆预报网络系统设计研究(1)——地震模型