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Earthquake forecasting method

A technology of earthquake prediction and prediction method, which is applied in the field of instrument analysis, can solve the problems of high price of gas chromatograph, influence on the popularization and application of fault gas CO2 method, and inability to equip stations.

Inactive Publication Date: 2008-12-31
TIANJIN NORMAL UNIVERSITY
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  • Application Information

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Problems solved by technology

Due to the high price, complicated operation, and harsh technical conditions and environmental requirements of the gas chromatograph, most of the stations in my country cannot be equipped, which affects the fault gas CO 2 The generalization and application of the method
In addition, there is still a common problem in the current method of using fault gas to predict earthquakes, that is, the source of carbon dioxide is relatively shallow, the content is relatively low, the concentration change is not obvious, and the monitoring sensitivity is poor

Method used

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Examples

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Effect test

Embodiment 1

[0018] In a place in western Liaoning, a 2,000-meter deep well is laid out, and then a measurement casing (10 meters long and 0.45 meters in diameter) with an open lower end is put into the deep well to inject 11MPa pressure carbon dioxide into the measurement casing, so that the carbon dioxide will flow around the deep formation. Diffusion in the environment; the upper end of the casing is connected to the HPLC measuring instrument to measure (1) CO 2 Change in pressure(2)CO 2 Change in gas temperature measurement (3) CO 2 Changes in radon, helium, hydrogen, and sulfur. On July 4, 2000, an obvious short-term anomaly was observed before the earthquake. Finally, it was determined by the instrument that the earthquake observed at the seismic monitoring point was at magnitude 3.9. The actual monitoring instructions from the seismic observation station: fault gas CO 2 The rapid assay method is fast, simple, cheap, reliable and effective. Through cumulative measurement, it is ...

Embodiment 2

[0020] In the yard of the Cangzhou Seismic Observation Substation, a deep well of 8,000 meters was laid, and then a measurement casing (30 meters long and 0.4 meters in diameter) with an open lower end was placed in the deep well, and 5 MPa pressure CO2 was injected into the measurement casing. 2 , so that carbon dioxide diffuses to the surrounding environment of the deep formation; the upper end of the casing is connected with the HPLC measuring instrument to measure (1) CO 2 Change in pressure(2)CO 2 Change in gas temperature measurement (3) CO 2 Changes in radon, helium, hydrogen, and sulfur. The radon measured by gas chromatography is 40×10 -6 . CO measured by gas chromatography 2 Pressure changes increase. On March 4, 2001, at the monitoring point of the Cangzhou Earthquake Observation Substation, an obvious short-term anomaly was observed before the earthquake. Finally, it was determined by the instrument that the earthquake observed at the seismic monitoring point...

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Abstract

The invention relates to a method for earthquake prediction, in particular to a method which comprises the following steps: a measurement sleeve with an opening at the lower end is put in a deep well; carbon dioxide with the pressure of 0.05 to 11MPa is injected into the measurement sleeve, and gas parameters are transferred or transmitted from the bottom to the top through the carbon dioxide, thereby detecting the pressure of the carbon diode and the gas temperature of the carbon diode; radon, helium, hydrogen, sulfur and other parameters in the carbon diode can reflect the changes of the deep strata, thereby further capturing the seismic abnormal phenomena. The method has the advantages that: the use of the method for the earthquake prediction has high accuracy of the monitoring for seeking 'earthquake precursor waves'; the method is simple, the result is reliable, the signal specificity is strong and the measurement precision is high.

Description

technical field [0001] The invention belongs to the technical field of instrumental analysis and relates to a new method of earthquake monitoring, more specifically, a fast and simple new method for earthquake prediction by detecting changes in underground carbon dioxide index parameters. Background technique [0002] Earthquake is a phenomenon in which the medium in the earth's interior undergoes a sharp rupture locally, generating seismic waves, which cause ground vibrations within a certain range. Like wind, rain, lightning, landslides, and volcanic eruptions, it is a natural phenomenon that often occurs on the earth. Earthquakes are the most intuitive and common manifestation of earthquakes. Large earthquakes can change local terrain, or uplift, or subsidence. The urban and rural roads are cracked, the rails are twisted, and the bridges are broken. In modern cities, water, power and communications are cut off due to underground pipes ruptured and cables cut. Leakage ...

Claims

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Application Information

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IPC IPC(8): G01V1/00
Inventor 段旭川
Owner TIANJIN NORMAL UNIVERSITY
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