传递岩梁周期裂断步距与周期来压步距差异分析

Difference between cyclic fracturing and cyclic weighting interval of transferring rock beams

依据传递岩梁理论体系,提出岩梁周期裂断步距与周期来压步距是两个性质不同的参量,分析了影响岩梁周期裂断步距的因素为岩梁结构、力学性质等力学参量。结果表明:影响岩梁周期来压步距的因素除岩梁周期裂断外,还与工作面支护强度、推进速度等工程参数相关。根据岩梁周期裂断步距与周期来压步距的力学结构,建立了各自的力学模型,推导其运动方程。建立岩梁周期裂断步距与周期来压步距之间的力学关系与数学关系,通过实例验证了运动方程的合理性和可行性。

Based on the transferring rock beam theory,it is pointed out that the cyclic fracturing length and the cyclic weighting interval of the rock beam fracture are two different parameters.The mechanical parameters,rock beam structure and mechanical properties affect the cyclic fracturing length,and besides the cyclic weighting interval,other engineering parameters such as the strength of working face support and the advancing speed can influence the fracturing of rock beam structure.According to structural mechanics of cyclic fracturing length and the cyclic weighting interval for the rock beam fracture,Mechanical models and the motion equation are established.The motion equation has been proved to be sound and feasible in practical application.