Evolution Characteristics and Instability Analysis of Stratified Roof Structure in Roadway with Different Stress Levels.

It can be seen that under the condition of increasing lateral pressure coefficient, the number of fractures shows an increasing trend, and the increase is larger and larger.

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With the increase of the lateral pressure coefficient, the maximum caving height of the layered roof shows an increasing trend, and the width of top surface of caving shows a decreasing trend.

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