Failure Characteristics and Control of Mining Roadway Surrounding Rock in Hongyang3rd Mine

摘要

The support of mining roadway in deep is the key technical problems of exploitation of coal resources,In order to investigate Characteristics of mining roadway surrounding rock failure in deep and Roof Control in hongyang3rd mine,based on actual geological conditions and ground-stress testing the mining roadway surrounding rock structure characteristic and stress state is analyzed in detail,the mining roadway textural characteristics belongs to soft and hard alternated adverse structure state is obtained,mining roadway surrounding rock in deep is in horizontal tectonic stress and vertical high Stress additive effects stress state.With mining area actual geological conditions be original shape,According to ground-stress testing determined regional main stress size and direction to be the load boundary condition,using RFPA software to numerically simulated mining roadway failure process,The simulation results show that: surrounding rock failure is heterogeneous and progressive failure process,using whole bolt section and bolt + anchor Cable section arranged by regular intermission of support pattern,combining surrounding rock gunite and metal net strengthening method,can also full play bolt anchor Cable,gunite,metal net support characteristics,can achieve a good supporting effect.