Experimental study on the control effect of ground stress on the damage of coal seam mining floor

Xi’an Research Institute of China Coal Technology & Engineering Group, Xi’an City, Shaanxi Provence, China

^* Corresponding author: Gan Tian: ccritiangan@126.com

Abstract

In order to study on mechanism of in-situ stress control on the coal floor damage during deep coal seam mining, the internal relationship among ground stress, mine pressure and floor water inrush was analyzed base on the increasing distribution rule of ground stress with the increasing depth of stratum. It is shown that the stress on the deep coal seam has obvious control effect on the depth of the floor damage and failure through the experimental study and the statistical analysis of the measured data of the mining damage depth of the coal seam floor. And the calculation formula for the depth of the floor failure in the deep seam mining was put forward.