Analytical method of deep mining floor rock stratum damage and fracturation evolution and failure law

Abstract

The invention discloses an analytical method of deep mining floor rock stratum damage and fracturation evolution and failure law. The analytical method comprises the following steps: Step 1, stope floor stress state data is acquired; Step 2, stope floor rock stratum damage and fracturation data is acquired; Step 3, deep well floor rock stratum damage and fracturation data is acquired; Step 4, deep well floor mining-induced damage and fracturation data is acquired; Step 5, the above stope floor stress state data, the stope floor rock stratum damage and fracturation data, the deep well floor rock stratum damage and fracturation data and the deep well floor mining-induced damage and fracturation data are analyzed so as to obtain deep mining floor rock stratum damage and fracturation evolution and failure law. By obtaining the deep mining floor rock stratum damage and fracturation evolution and failure law, data foundation is provided for specific deep mining, so as to further provide technical support for raising deep 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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