大采高采场关键层破裂对垮落带高度的影响

摘要

以某煤矿大采高采场为对象，分析其上覆岩层岩性，运用“关键层”理论推导出上覆岩层“关键层”的层位，并建立力学模型算出该矿关键层的断裂条件，分析关键层断裂对垮落带高度的影响。对类似地质条件的煤矿的开采具有借鉴价值。%On a large-mining-height mining area, its overburden rock stratum was analyzed. Key stratum theory was used to deduce the position. Mechanical model was established to calculate the cracking condition. The effects of key strata fracture on caving zone height were studied, which could be helpful for the mining in the similar geological conditions.