Method for calculating parameters of primary fracture of overlying strata of coal seam

Abstract

The invention discloses a method for calculating parameters of a primary fracture of overlying strata of a coal seam. The method comprises the following steps: acquiring an I3D fracture indication strength data body; acquiring water testing pressure data; acquiring slurry consumption data; calculating the equivalent width of the crack; calculating the equivalent length of the crack. The method is suitable for the technical field of coal mining, the method is simple, actual operation is convenient, in the coal mining exploration and mining process, mud leakage amount and water testing pressure data are convenient to record, the coverage is wide, real-time updating is achieved, and application and popularization of the method in the field of coal fields are facilitated. Meanwhile, the field of geological engineering integrated research is broadened, a correlation is established between equivalent length and equivalent width parameters of the crack and the slurry leakage amount and the water testing pressure, cognition of geology and engineers on underground conditions is unified, a unified measurement unit is used, and calculation data can be directly applied to engineering design and construction; the geophysical fracture prediction result is quickly converted to field application, and the result conversion rate of geological scientific research is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of coal mining, in particular to a method for calculating the parameters of primary cracks in overburden coal seams. Background technique [0002] Fracture prediction technology has been widely used in many fields, especially in the energy field, where fracture prediction using geophysical technology is the most common; but limited by the current 3D seismic data acquisition and processing technology, the fracture prediction accuracy and accuracy However, in the process of coal mining, many The application of this engineering technology needs to provide crack parameters to ensure the effectiveness and scientificity of engineering design and implementation. For this reason, this patent proposes the concepts of equivalent fracture length and equivalent fracture width. The purpose is to regard the fracture development strips predicted by 3D seismic as multiple fractures cutting and interweaving into an intercon...

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Problems solved by technology

[0002] Fracture prediction technology has been widely used in many fields, especially in the energy field, where fracture prediction using geophysical technology is the most common; but limited by the current 3D seismic data acquisition and processing technology, the fracture prediction accuracy and accuracy However, in the process of coal mining, many The application of this engineering technology needs to provide crack parameters to ensure the effectiveness and scientificity of engineering design and implementation

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