厚煤层综放开采超前支承压力预测理论与实测分析

Prediction theory and practical analysis of advanced supporting pressure in fully-mechanized caving of thick coal seam

厚煤层综放开采会引起超前支承压力和影响范围的明显变化,以东日升煤矿8103综放工作面为工程背景,建立超前支承压力作用下煤岩体力学模型,得出超前支承压力与极限平衡区公式,计算得出超前支承压力影响范围为5.5 m;基于声波测距原理,在8103工作面进行瑞利波的发射和监测,得出极限平衡区范围4.8 m,与现场实测结果基本相符,证明了理论计算的合理性。

Thick coal seam fully mechanized mining led to the change of bearing pressure and influence range,8103 fully mechanized working face of Dongrisheng Mine was taken as background,mechanical model of coal and rock mass under advanced support pressure,formula of advanced support pressure and limit equilibrium area was got,the influencing scope of advanced support was 5.5 m,Rayleigh wave's launch and monitoring was conducted in 8103 working face based on sound ranging principle,limit equilibrium range was 4.8 m by calculation,corresponding to the measurement in the field.