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本文着重介绍了我国首次组织的水压致裂水文地球化学效应实验研究的主要成果。这次实验规模大、观测项目多,是一次多学科的综合观测实验。在实验中使用了一批先进的测试仪器和技术,采用了三次加压重复观测的方法,取得了重现性好的结果和可靠的实验资料。这次实验产生“效应”最显著的项目是氡、水位及其他气体组分,同时验证了引起水位效应的机制不仅是岩石压力应变的传递,而更重要的可能是含水系统孔降压力升高的水力传导。实验表明,水压致裂方法对于检验各种前兆现象的力学效应,探索前兆异常机理及指导监测预报有重要意义。
This article focuses on the main results of the experimental study of the hydrostatic fracturing hydrogeochemistry effect for the first time in China. This experiment is large-scale, many observation projects, is a comprehensive multidisciplinary observation experiment. In the experiment using a number of advanced test equipment and techniques, using three repeated observation of pressurized method, and achieved good reproducibility of the results and reliable experimental data. The most significant “effect” experiments in this experiment are radon, water level and other gas components. It is also verified that the mechanism that causes the water level effect is not only the transmission of rock pressure and strain, but more importantly, the pore-forming pressure of aquifer system is increased The hydraulic conductivity. Experiments show that the hydraulic fracturing method is of great significance for testing the mechanical effects of various precursor phenomena, exploring the mechanism of precursor anomalies and guiding the monitoring and forecasting.