Analysis method of damage and fracture evolution and failure law of floor strata in deep mining

Abstract

The invention discloses a method for analyzing the damage and fracture evolution and failure law of deep mining floor strata, which comprises the following steps: a step of collecting stress state data of the stope floor; a step of collecting damage and rupture data of the stope floor strata; collecting deep well floor strata The steps of the damage and fracture data; the steps of collecting the mining damage and fracture data of the deep well floor; analyzing the above stope floor stress data, the stope floor strata damage and fracture data, the deep well floor strata damage and fracture data and the deep well floor mining damage and fracture data, and draw The steps of the damage and fracture evolution process and failure law of the deep mining floor rock formation. Obtain the damage and fracture evolution process and failure law of deep mining floor rock, provide data basis for specific deep well mining, and provide technical support for improving deep well mining efficiency and mining safety.

Description

technical field [0001] The invention relates to an analysis method for damage and fracture evolution and failure law of deep mining floor rock formations. Background technique [0002] Coal seam floor rock is the main research object of floor water inrush, and it is also the main carrier of mine barrier water. With the extension of the mining level and the expansion of the mining range, the buried depth of the working face increases and the structure is complex. During the mining process, the rock mass of the coal seam floor is periodically damaged, and the damage is continuously transmitted forward. Commonly used methods for the study of floor rock formations include theoretical calculations, field measurements, empirical formulas, numerical simulations, and similar material simulations. Its main contents are: [0003] (1) Theoretical calculation. Theoretical calculation is mainly to generalize the geological conditions into a mathematical model, use the relevant mechani...

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Problems solved by technology

[0008] However, as the mining depth continues to increase, the geological conditions of the stope and the mining environment are becoming more and more complex. The above-mentioned methods still have many defects in the evolution process of damage and fracture of the floor rock formation and the law of failure in deep mining, and it is impossible to fully analyze them.

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