Study On Ground Pressure Behavior Anomaly In Fully-Mechanized Top-Coal Caving Workingface

The ground pressure behavior anomaly in fully-mechanized top-coal caving working face is a trans-normally and detrimentally dynamic pressure phenomenon. Facing lots of ground pressure behavior anomaly phenomena occurred in fully-mechanized top-coal caving working face in recent years, the paper classifies these phenomena according as the plentiful survey data, and builds equations under different stations of strata structure and movement style by up-building the model of main roof structure and analyzing it. According to the mechanical equation qualification, the paper proposes the conditions that are prerequisite when ground pressure behavior anomaly phenomena occur under different stations. The paper also proposes three models of ground pressure behavior anomaly phenomena and demonstrates each ground pressure mechanism of them. At last, the paper proposes synthetical measure of prevention and cure for controlling ground pressure behavior anomaly based on the idea of combining advancing forecast and site control.