覆岩及采动岩体裂隙场分布特征的可视化探测

Visual exploration of fissure field of overburden and rock

利用钻孔彩色电视系统观测了大量钻孔内部原生裂隙以及采动岩体裂隙的分布及其发育特点.研究得出原生裂隙场具有绝大多数发育横向微裂隙,裂隙被充填物所充填以及部分发育纵向裂隙,较破碎的特点;采动岩体裂隙则具有发育纵横交错的相交裂缝,以高角度纵向裂缝为主,且随着离煤层顶板距离减小,并逐步向破碎型裂缝发展的特点.

Fissure distributing and development characteristic in hole were detected by use of borehole television. The results show that the original fissure field has characteristics such as the horizontal development of microcracks, fissures were fill with filling material, as well as part of the development of vertical cracks, broken. The rock fissures has characteristics such as the intersection cracks in high-angle vertical, and along with reducement of the distance from the roof, gradually development to the broken cracks.