The Numerical Simulation Research Of GOB Roof Movement Law Under The Influence Of Mining

With the consumption of coal resources, coal reserves dwindling, diging deeper and deeper, cause ground pressure, and GOB roof movement has become increasingly sophisticated. Under the influence of mining, overburden strata movement cause caving zone, fracture zone, curve subsidence zone. Three-zone can cause accidents, especially fractures can lead to water inrush, gas, so it is very important for observation and study on coal safe mining.Taking the background of Yuanzhuang coal mine IV6214mining, through laboratory experiments obtained original rock mechanical parameters and performance, further study rock properties and mechanical parameters of overburden coal, studied overburden damage, and analyzed the effects of the overlying level III Northern Transportation Roadway. Using numerical simulation, theoretical analysis, and numerical simulation techniques detailed analysis laws of IV6214Face Roof strata behavior, analysis of the causes and mechanisms of three bands, and to study the impact of three factors with height. Analog overburden fracture field evolution caused by face mining, water flowing fractured zone height and spread range; Obtained roadway pressure behavior law fully mechanized mining face; Studied the stress and displacement evolution of the overburden caused by mining temporal; accurate assess and predicte water in III level main haulage roadway transport to working face, give the control methods of the hazards of water seepage.Conclusion in this paper not only can guide production of6in deep seam in Yuanzhuang mine, also provides theories and tests based for exploitability assessment of4in deep coal seam, might extend Yuanzhuang coal mine service life.