工作面顶板二次断裂的研究

本文通过对现场工作面来压所进行的预测预报所观测到的工作面顶板二次断裂现象进行分析,建立了工作面项板三次断裂的力学模型,研究表明对于各种不同的顶板三次断裂均有可能发生,它与顶板上覆岩层的变形特性和煤体或直接顶的变形特性有关并且提出通过提高工作面支架阻力是难以控制顶板二次断裂发生的,同时指出对于三次断裂不是控制其位置而在于采取安全措施通过三次断裂区域。图4,袁2,参3。

A STUDY OF THE SECONDS FRACTURE OF THE LONGWALL FACES ROOFS

A mechanics model of the seconds fractured roofs is built by analying measured data during prediction faces roof weighing in the paper. It is given that the seconds fractures well be occured in the all of the different roofs. The seconds fractures have a vital bearing on the character of deformation of the upper roofs and the coal or the neither roofs, on the orce of the supports. It difficult that the seconds fractures of the roofs is controlled with increasing the force of the supports in the paper. Rather than the location of the seconds fractures is controlled the safer practices are got going in the domain of the seconds fractures. 4figs., 2tabs., 3refs.