CN103344987B - The method of artificial earthquake decipher active fault activity intensity and the direction of growth - Google Patents
The method of artificial earthquake decipher active fault activity intensity and the direction of growth Download PDFInfo
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- CN103344987B CN103344987B CN201310283822.0A CN201310283822A CN103344987B CN 103344987 B CN103344987 B CN 103344987B CN 201310283822 A CN201310283822 A CN 201310283822A CN 103344987 B CN103344987 B CN 103344987B
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Abstract
The invention discloses the method for artificial earthquake decipher active fault activity intensity and the direction of growth, step comprises: one, determine active fault growth tendency; Two, active fault activity intensity is determined.The characteristics and rules of active fault being found by this method, predict the change in its future, for reducing the geologic hazard caused by active fault, ensureing that the long term survival of the mankind and development have great importance; For the research of earthquake and Recent Subsidence And Tectonic Movement relation, seismographic development can be promoted, improve the science of earthquake prediction; Active fault and Safety of Coal Mine Production in close relations, adopt this technology can detect extension, the distribution characteristics of active fault, avoid pit shaft and tunnel to build on active fault band, for construction of coal mine provides reliable geologic basis.
Description
Technical field
The present invention relates to a kind of method of decipher active fault activity intensity and the direction of growth, particularly relate to a kind of method of artificial earthquake decipher active fault activity intensity and the direction of growth.
Background technology
The method of present analysis active fault mainly adopts morphologic analysis, geological survey, the technology such as seismic prospecting and remote Sensing Interpretation.The growth of active fault is mainly held in morphologic analysis from macroscopic view and earth's surface; Geological survey mainly utilizes probing means to carry out constructing and stratum investigation, but detects helpless to the active fault in loose; Remote Sensing Interpretation utilizes the distinctive interpret tag such as stratum landforms to carry out decipher to structure, but its interpret tag exists limitation, shallow and changeability, adds the uncertainty of interpretation result.
Artificial earthquake technology focuses at present carries out static interpreter to active fault, generally carrying out qualitative determining whether according to the old and new on tomography bad break stratum is active fault, seismic and geologic information is not comprehensively analyzed, can not determine change procedure and the growth tendency of active fault activity intensity, geologic basis cannot be provided for earthquake forecasting research, city substrate estimation of stability, Safety of Coal Mine Production etc.
As can be seen from above-mentioned analysis, current active fault analytical technology can not well decipher active fault activity intensity and the direction of growth, and existing production and life in, a kind of method of energy decipher active fault activity intensity and the direction of growth is needed in particularly earthquake forecasting research, city substrate estimation of stability, Safety of Coal Mine Production, be conducive to preventing in advance and decision-making, but have no report in prior art.
Summary of the invention
The present invention seeks to the above-mentioned shortcoming overcoming prior art existence, a kind of method of artificial earthquake decipher active fault activity intensity and the direction of growth is provided.
For achieving the above object, the technology used in the present invention means are: the method for artificial earthquake decipher active fault activity intensity and the direction of growth, and step comprises:
One, active fault growth tendency is determined: gather an ultra shallow layer seismic data and process, the breakpoint of each seismic horizon connecting by time section in turn, active fault continuous print section can be obtained; The record 0 falling point time of tomography on time section of earthquake, 0 falling point of section is added up in different location in space, obtain the latest activity time limit in the different location of active fault, the i.e. most superficial part position that arrives of active fault latest activity, the envelope linked up by these the most shallow points is as the forward line of fault surface, and the direction vector along this forward line end points proceeds by the again movable of active fault; Direction vector according to its forward line draws active fault Growth In Space and development trend figure;
Two, active fault activity intensity is determined: determine on the basis of active fault section in step one, determine the seismic horizon that each stratum is corresponding, then from seismic horizon and seismic time angle, the change of active fault drop is analyzed, determine the change of active fault drop on vertical; Add up vertical different layers position drop and fitting of a polynomial is carried out to drop discrete data, matched curve is as tomography growth curve, the time in geochron will be converted to during seismometer, differential is carried out to tomography growth curve, namely ask for the slope value of growth curve difference, draw out reflection active fault activity intensity relativeness curve according to slope value.
Beneficial effect of the present invention is: the characteristics and rules that can be found active fault by this method, predicts the change in its future, for reducing the geologic hazard caused by active fault, ensures that the long term survival of the mankind and development have great importance; For the research of earthquake and Recent Subsidence And Tectonic Movement relation, seismographic development can be promoted, improve the science of earthquake prediction; Active fault and Safety of Coal Mine Production in close relations, adopt this technology can detect extension, the distribution characteristics of active fault, avoid pit shaft and tunnel to build on active fault band, for construction of coal mine provides reliable geologic basis.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is active fault Growth In Space of the present invention change schematic diagram;
Fig. 2 is different section section active fault tops of the present invention envelope diagrams.
Embodiment
Artificial earthquake decipher active fault activity intensity as shown in Figure 1, 2 and the method for the direction of growth, step comprises:
One, active fault growth tendency is determined: gather an ultra shallow layer seismic data and process, the breakpoint of each seismic horizon connecting by time section in turn, active fault continuous print section can be obtained; The record 0 falling point time of tomography on time section of earthquake, 0 falling point of section is added up in different location in space, obtain the latest activity time limit in the different location of active fault, the i.e. most superficial part position that arrives of active fault latest activity, the envelope linked up by these the most shallow points is as the forward line of fault surface, and the direction vector along this forward line end points proceeds by the again movable of active fault; Direction vector according to its forward line draws active fault Growth In Space and development trend figure;
Two, active fault activity intensity is determined: determine on the basis of active fault section in step one, determine the seismic horizon that each stratum is corresponding, then from seismic horizon and seismic time angle, the change of active fault drop is analyzed, determine the change of active fault drop on vertical; Add up vertical different layers position drop and fitting of a polynomial is carried out to drop discrete data, matched curve is as tomography growth curve, the time in geochron will be converted to during seismometer, differential is carried out to tomography growth curve, namely ask for the slope value of growth curve difference, draw out reflection active fault activity intensity relativeness curve according to slope value.
The characteristics and rules of active fault being found by this method, predict the change in its future, for reducing the geologic hazard caused by active fault, ensureing that the long term survival of the mankind and development have great importance; For the research of earthquake and Recent Subsidence And Tectonic Movement relation, seismographic development can be promoted, improve the science of earthquake prediction; Active fault and Safety of Coal Mine Production in close relations, adopt this technology can detect extension, the distribution characteristics of active fault, avoid pit shaft and tunnel to build on active fault band, for construction of coal mine provides reliable geologic basis.
This technology is applied in the production of certain Mining Group coal industry incorporated company, two main haulage roadways that this ore deposit adopts in the original plan will through a tomography in mining area, find out that this tomography is active fault by the inventive method, the direction of growth and activity intensity are as shown in Figure 1, 2, by analyzing very likely generation activity in figure, and conducting Quaternary aquifer, very unfavorable to safety in production, and then vetoed former scheme, avoid the hidden danger of safety in production, for the said firm produces decision-making benefit about 1,600,000,000 yuan, visible economic benefit and social effect are all very great.
The above, be only the specific embodiment of the present invention, is not limited thereto, and is anyly familiar with those skilled in the art in the technical scope that the present invention discloses, and can expect change easily or replace, all should be encompassed within protection scope of the present invention.
Claims (1)
1. the method for artificial earthquake decipher active fault activity intensity and the direction of growth, is characterized in that, step comprises:
One, active fault growth tendency is determined: gather an ultra shallow layer seismic data and process, the breakpoint of each seismic horizon connecting by time section in turn, active fault continuous print section can be obtained; The record 0 falling point time of tomography on time section of earthquake, 0 falling point of section is added up in different location in space, obtain the latest activity time limit in the different location of active fault, the i.e. most superficial part position that arrives of active fault latest activity, the envelope linked up by these the most shallow points is as the forward line of fault surface, and the direction vector along this forward line end points proceeds by the again movable of active fault; Direction vector according to its forward line draws active fault Growth In Space and development trend figure;
Two, active fault activity intensity is determined: determine on the basis of active fault section in step one, determine the seismic horizon that each stratum is corresponding, then from seismic horizon and seismic time angle, the change of active fault drop is analyzed, determine the change of active fault drop on vertical; Add up vertical different layers position drop and fitting of a polynomial is carried out to drop discrete data, matched curve is as tomography growth curve, the time in geochron will be converted to during seismometer, differential is carried out to tomography growth curve, namely ask for the slope value of growth curve difference, draw out reflection active fault activity intensity relativeness curve according to slope value.
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| CN105653834B (en) * | 2014-11-10 | 2018-09-04 | 中国石油化工股份有限公司 | Fracture Transient activity based on SEQUENCE STRATIGRAPHIC principle quantitatively determines method |
| CN106443782B (en) * | 2016-09-20 | 2018-10-09 | 中国地质大学（北京） | A kind of tomography and fracture development density, uniformity and assemble pattern evaluation method |
| CN106772602B (en) * | 2016-12-22 | 2019-01-08 | 中国科学院地质与地球物理研究所 | Growth fault activity intensity quantitatively characterizing method |
| CN106855641A (en) * | 2017-02-06 | 2017-06-16 | 合肥工业大学 | A kind of method of utilization detection of seismic reflected wave an ultra shallow layer tomography |
| CN108680952B (en) * | 2018-04-03 | 2019-11-26 | 中国石油大学(华东) | A kind of strike-slip fault structural evolution analytic method |
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| CN102937724A (en) * | 2012-11-20 | 2013-02-20 | 中国神华能源股份有限公司 | Detection method of stope bottom rock stratum of open coal mine |
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| CN102937724A (en) * | 2012-11-20 | 2013-02-20 | 中国神华能源股份有限公司 | Detection method of stope bottom rock stratum of open coal mine |
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