Method for dynamically and accurately detecting coal seam overlaying rock fracture development range and degree

Abstract

The invention provides a method for dynamically and accurately detecting coal seam overlaying rock fracture development range and degree. The method comprises the following steps of analyzing coal mine geology and hydrological, geological survey data, and delineating an overlaying rock detection area; collecting three-dimensional seismic data of the delineated overlaying rock detection area; performing geological statistical inversion on the basis of the acquired three-dimensional seismic data, wherein different cross-section overlaying rock damage degrees of the delineated overlaying rock detection area comply with an area with a preset standard to serve as a to-be-surveyed area; performing drilling radar or drilling television exploration on the to-be-surveyed area; and performing dynamic analysis on the fracture development range and degree of the coal seam according to the exploration result. The method is mainly used for detecting the lower coal seam exploration overlaying rock fracture development range and degree, and observing whether the fracture dynamic development range reaches the bottom of an underground reservoir of a coal mine or not in real time and whether water guiding fractures are formed, thereby ensuring safety of lower coal seam working surface exploration.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a dynamic and precise detection method for the development range and degree of cracks in overburden coal seams. Background technique [0002] Coal is the main energy source in my country, accounting for 96% of the total fossil energy reserves and about 70% of primary energy production and consumption. The west is the main battlefield of my country's coal mining, and its output accounts for about 80% of the country's total. As the resources in the east are transferred to the deep and the security risks are increasing, the proportion of its output will continue to rise. However, the west (Shanxi, Shaanxi, Mongolia, Ninggan, and Gansu) lacks water resources, accounting for only about 3.9% of the country. [0003] On the other hand, according to statistics, my country produces 8 billion tons of mine water every year due to coal mining, and the utilization rate is less than 25%. ...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a dynamic and accurate detection method for the development range and degree of cracks in the overburden of coal seams, so as to solve the problem that there is currently no solution that can realize the dynamic and accurate detection of the development range and degree of cracks in overlying coal seams, so as to ensure the following Mining safety of coal seam work and safe operation of coal mine underground reservoir

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