摘要
应用数值计算,分析43002工作面覆岩结构特征。通过分析该工作面直接顶、老顶初次垮落和周期性垮落的条件,建立力学模型。对模型的受力条件进行分析,建立力学数学关系式,计算、推导得出直接顶工作面中部及煤壁处的弯矩与支护阻力关系,以及老顶初次断裂和周期性断裂的极限跨距。
The structure characteristics of overlying strata at 43002 face is analyzed by numerical calculation. Through analysis on the first collapse and periodic caving conditions of the face nether roof and main roof, the mechanics model is established. On the model stress conditions, the establishment of mechanics, mathematical formula, calculation, it＇s derived that the relationship between moment and support resistance at the nether roof working face and coal wall, and main roof first fracture and periodic fracture limit span.
出处
《煤炭技术》
CAS
北大核心
2012年第3期85-88,共4页
Coal Technology
关键词
直接顶
老顶
初次垮落
断裂规律
nether roof
main roof
first caving
fracture pattern
