CT探测覆岩破坏高度的试验研究

介绍了在观测钻孔中应用电磁波层析技术（即ＣＴ）探测覆岩破坏高度的方法，利用覆岩的吸收系数、介电常数和电导率等电磁参数在开采前后的数值变化，并结合岩性和地质采矿条件等对其进行综合解释，从而较准确地重现覆岩的地层结构和煤层开采后覆岩的破坏变化，为判定覆岩破坏高度提供更为直观、可靠的依据．

DETERMINATION OF THE HEIGHT OF THE FAILED OVERLYING STRATA BY COMPUTER TOMOGRAPHIC TECHNIQUE

Computer tomographic technique (CT) was applied in detection of the height of broken rock in the overlying strata from observation boreholes. Variations of absorptivity coefficient, dielectric constant, conductivity, etc. of the overlying strata before and after coal extraction were used in combination with the lithological, geological and mining conditions to interpret the height of failed rock. The structure of strata, variation of rock failure after coal extraction can be reproduced more accurately, which provides a visual and reliable criterion for determination of the height of broken rocks.