analysis of strata rock  煤岩分析

character of the falling rock movement  落石运动特征

coal and rock movement  煤岩移动

compound rock strata  复合岩层

essential rule of coal and rock movement due to mining  开采岩移基本规律

fractured rock strata  地质缺陷

hydraulic conductivity of rock strata  岩层透水性

medium hard rock strata  中硬岩地层

overburden rock movement  覆岩移动

Rock Movement  岩层移动; 岩体移动

rock movement in bed-separation  岩层移动

ROCK STRATA  采场覆岩; 岩层

rock strata class V  V类围岩

rock strata control  岩层控制

rock strata deformation  岩层变形

rock strata movements  岩层移动

rock strata unit  岩石地层单位

slope of nearly horizontal competent and incompetent intercalated rock strata  近水平岩层斜坡

soft coal rock strata  软煤岩层