【摘要】 在奥陶系灰岩岩溶承压水上带压开采时,用综合方法进行了观测,在室内做了相似材料模拟试验,得到了不同情况下的放(注)水规律;底板岩层水平及垂直方向受力情况;附加最大剪应力值;主压力方向;应力分布曲线;底板位移曲线及底板裂隙发育状况等,从而确定了底板破坏深度。更多还原

【Abstract】 Our institute has observed the coal mining under the pressure of the Ordovician limestone Karst water under the coal seams we did this with a synthetic method, and have made an initial experiment with similar materials. From these methods, we have obtained the laws of emitting water and its flooding, the vertical and horizontal stress’s affect on the rock seams the under the floor, the maximum number of addational cutting stress, the main pressing stress’s direction, the curves of the stress distribution and the movement of the floor, the growth of crevices in the floor. On this basis, the damaging depth of the floor was determined更多还原