Fracture trend fault displacement graphical calculation method based on fault intersection plane line

Abstract

A fracture trend fault displacement graphical calculation method based on a fault intersection plane line comprises the following steps: drawing a fracture structure outline diagram of a typical stratum interface contour line, obtaining basic geological occurrences such as trend, inclination, inclination angle [alpha], fall H and extension length L through various methods, introducing a quantitative relationship among the geological occurrences, and through adoption of a graphical method, and by means of the proportional relation between the actual value of the geological occurrence in the actual production process and the value of the geological occurrence in the fracture outline map, obtaining the fault strike fault displacement through mutual conversion. According to the method, the mineral exploitation safety can be improved, and the mineral exploitation cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of coal geological exploration, in particular to a graphical calculation method of fault strike and distance based on fault intersection lines. Background technique [0002] In the process of mineral exploration, the distance between the two ore layers of the fault after the ore layer is dislocated by a fault is an indispensable data for the development of mineral resources. The occurrence of safety accidents is of great significance. However, relevant technical personnel only pay attention to the distance of the fault along the inclined direction, that is, the drop and leveling of the fault. In fact, the fault still has a slip distance on the strike, that is, the strike distance, but the predecessors did not pay enough attention. [0003] At present, the existing methods for calculating the fault throw along the strike of the fault zone mainly include the following methods: Calculation method 1: On the bas...

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Problems solved by technology

[0004] However, the above-mentioned method in the prior art has at least the following defects: 1. Based on the above-mentioned calculation method 1, it is difficult to obtain the total fault distance of the fault, and it is very difficult to solve the actual production problem

2. Based on the above calculation method 2, it is generally assumed that the section is upright and has no rotation, and the strike-slip displacement calculation method of different rotation angles is not considered, and the numerical accuracy obtained under the rotation condition is not high

3. Based on the above calculation method 3, it is mainly applicable to active boundary faults in some strike-slip pull-apart basins, and not applicable to the calculation of strike-slip fault displacement of small structures in other structures

4. Based on the above calculation method 4 and calculation method 5, the probability of finding a special geological body with the same landmark on both sides of the fault is low, and the calculated probability is low

5. Based on the above calculation method 6, it is not easy to find the plane outcrop of the thrust double-nappe structure, and the lateral expansion of the structural deformation needs to be ignored, and the slippage of the overlying strata, the denudation situation, and the impact of the thrust component on the wall must also be considered. Influencing factors

6. Based on the above calculation method 7, seismic data and logging data cannot be well combined due to inconsistent accuracy, and identification is difficult, and the calculation probability is low

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