METHOD OF PREDICTIVE CALCULATION OF THE EARTH’S SURFACE SUBSIDENCE FOR PROTECTING RAILWAYS AGAINST UNDERWORKING

Abstract

Underground development of mineral deposits causes deformations of the earth's surface in the form of a displacement trough, which negatively affects buildings and structures undermined. Knowing the parameters of the displacement trough subsidence curve at the design or operation stage of a construction site will prevent the dangerous impact of underground work and reduce the cost of repair and restoration work. A method of predictive calculation of earth’s surface subsidence based on the construction of the boundaries of the stress-strain state of rocks zones using curved slip lines is proposed. Curved slip lines are built on the basis of the equation of damped oscillations and take into account the geological and mining conditions in the field under consideration. The predictive method of subsidence of the earth's surface makes it possible to predict and calculate the values of subsidence of the earth's surface at the design stage of underground mining and build a shear trough profile based on them. Based on the predictive method for calculating the parameters of the displacement trough, a method of protecting railways by arranging an embankment at the design stage is proposed. This technique will make it possible to take  the needed mining and constructive measures in advance to protect against the harmful effects of underground mining in relation to protected objects without disrupting their operation.