覆岩岩性与开采影响传播方向关系的研究

A STUDY ON RELATIONSHIP BETWEEN OVERBURDEN PROPERTY AND DIRECTION OF INFLUENCE PROPAGATION

本文通过覆岩岩性与开采影响传播方向关系的研究 ,论证了覆岩岩性与地表最大下沉值的密切关系 ,为“三下”开采予计地表最大下沉值的位置和量值 。

The relation between the properties of overlaying strata and the propagation directions of the exploitation effect was studied. In is found that the softer the overlaying strata, the stronger is the influence on the maximum subsidence values at the earth's surface; and the greater the dip angle of a coal seam, the larger is the change of maximum subsidence values at earth's surface, when the pitching coal under buildings, water and railways is extracted. The conclusion has the important significance for forecasting the locations and maximum subsidence values, selecting correctly maximum subsidence angles, predicting the moving directions of the extracted roofs, preventing caving and keeping safe production in mines.