Research On The Technology Of Floor Roadway Surrounding Rock Control Influence By Two Times Mining

With the increase of depth and strength of coal mining, dynamic pressure of roadway supporting problem becomes day by day important, especially the influence of dynamic pressure by many times roadways, the damage mechanism of surrounding rock degeneration was complex, and very difficult to control. Our study systematic analysis the floor roadway pre-reinforcement support technology measures by the close coal seam one after the other mining. And in HuaiBei mining group TaoYuan coal mine area7246and8246working face and did industrial test on floor roadway as engineering backgroundOur study using Hoeck-Brown strength criterion and unified strength theory to analyze the depth of biggrst damage floor. At the same time, according to different space position above the coal seam roadway according rock mechanical property testing results movement theory calculated its scope of the plastic zone, our study systematic analyze the distribution law of a layer of roadway mining stress and distribution zone of plastic area. Also, we e measured physical mechanical properties of rocks by means of trial, we made classification analysis on the basis of the roadway stability levels, then puts forward concrete reinforcement measures on the floor space of different position. We use computer numerical simulation system to analysis the reinforcement of after first, secondary dynamic pressure during the influence of the surrounding rock stress, plastic distribution and deformation characteristics, and will be used in the research results of the floor reinforcement engineering practice. Through the two dynamic pressure which during the influence of rocks deformation characteristics of the monitoring analysis, further evaluation the reinforcement effect. Our research results have guiding significance on the condition of the combined mining of dynamic pressure roadway reinforcement engineering.