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mei ceng di ban po huai shen du de zong he ce shi fang fa
Pages: 1-7
Year: Issue:  4
Journal: Journal of Shandong University of Science and Technology(Natural Science)

Keyword:  rock strata destroyeddestructive depthcomprehensive determinationinspection method;
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
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