A dynamic and accurate detection method for the development range and degree of cracks in overburden coal seams

Abstract

The invention provides a dynamic and accurate detection method for the development range and degree of cracks in overlying rocks of coal seams. The method includes: delineating the overlying rock detection area by analyzing coal mine geology, hydrology, and geological survey data; collecting three-dimensional seismic data of the delineated overlying rock detection area data; carry out geostatistical inversion based on the collected 3D seismic data, and delineate the areas where the overburden damage degree of different sections in the overlying rock detection area meets the preset standards, as the area to be explored; conduct borehole radar or borehole TV in the area to be explored Exploration: based on the exploration results, dynamically analyze the development range and degree of cracks in the overlying rock of the coal seam. The invention mainly detects the development range and degree of cracks in the overlying rock during the mining of the lower coal seam, and observes in real time whether the dynamic development range of the cracks reaches the bottom of the underground reservoir of the coal mine and whether water-conducting cracks are formed, so as to provide safety guarantee for the mining of the working face of the lower coal seam.

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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