【摘要】 冲击破煤是一个动力学过程 ,冲击的一瞬间在煤体中诱发压应力场和拉应力场 ,文中通过相似模拟试验得到冲击瞬间煤体中质点的拉应力峰值和该质点到冲击作用点距离的数据 ,进而通过曲线拟和的方法来分析拉应力场在煤体中的变化情况更多还原

【Abstract】 Impact coal cutting is a progress of dynamics.At the moment of impacting,the coal rock will gender press and pulling stress field.In this paper,we get the maximum data of pulling force which changed with the distance to the point where impacting acted on by a similar simulation experiment.Further more,we used curve-fitting to introduce and analysis the variation of pulling stress field in coal rock.更多还原