采煤工作面动力现象特征分析

Analysis of Dynamic Characteristics of Coal Working Face

针对采煤工作面地质条件复杂,煤层滑面发育,煤质松软破坏,发生瓦斯动力现象给矿井安全生产带来重大隐患等问题。以贵州某矿采煤工作面发生的动力现象为例,依据动力现象特征及其发生的原因,通过对采煤工作面煤层赋存和应力特征及动力现象垮塌煤炭的堆积形状、瓦斯涌出量分析,得出此次动力现象属典型的压出,顶板压力和构造应力是动力,采煤机截煤产生的震动是主要诱因,为指导矿井安全开采提供了依据。

In view of the complicated geological conditions of the coal mining face, the development of coal seam sliding surface, the soft coal destruction, and the occurrence of major hidden dangers to the safety production of the mine. Taking the dynamic phenomenon of coal mining face in a coal mine in Guizhou as an example, according to the characteristics of the dynamic phenomenon and the causes of the occurrence, through the analysis of the deposit shape and the gas emission of the coal seam in the coal mining face, it is concluded that the dynamic phenomenon belongs to the typical pressure, the roof pressure and the tectonic stress. Force is the motive force, and the vibration produced by cutting coal is the main inducement, which provides a basis for guiding safe mining in the mine.