Study On The Relationship Of The Ground Stress And Roadway Surrounding Rock Stability In Gucheng Coal Mine

The thesis investigated the geological and mechanical characters of+420levelroadway in ShanXi Lu’an GuCheng coal mine， testing the mechanical parameters ofroadway surrounding rock in the laboratory; Measuring the ground stress of Guchengcoal mine by hollow inclusion stress-relief method; summarizing the ground stressdistribution rules combining the fixing construction test; Deducting the formula of therelationship between the ground stress and the roadway surrounding rock stability，analyzing the horizontal and vertical angel between the larger horizontal stress and theroadway axes affecting the surrounding rock stress and the displacement throughestablishing the model of generalized plane-strain model in elastic aspects. Analyzingthe surface stress and displacement distribution rules of western enter roadwaysurrounding rock Simplifying the formula、the inner stress and displacement variationrules by deep direction of eastern2#air returning roadway by simplifying and givingparameters to the surrounding rock stress and displacement with controllingvariables， combining specific ground stress data of Gucheng. Basing on the practicalmeasuring ground stress， designing the eastern2#air returning roadway supportingscheme by the relationship between the ground stress and the roadway surroundingrock stability， and making sure the safety and rationality by FLAC3Dnumericalcalculation and arranging the mining pressure monitor station， successing finishingthe practical tests.The thesis proves the important roles of studying the relationship， which wouldguide the surrounding rock control.