The Prediction And Control Technology Of Impact Pressure In The Deep Well Of Coal Mine In Tangkou Coal Mine.

The impact ground pressure is a disaster that affects the safety of mine production.With the gradual deepening of the mining face,The danger of rockburst is more serious,the impact of the pressure on the ground pressure is more serious.Therefore,it is of great significance to study the mechanism,influence factors,prediction and prevention of the rock burst in deep mine.In this paper,taking the 4302 working face of the thousand meters deep well in the Tang Kou mine as the research background,the mechanical experiment,the theoretical analysis,the model prediction,the numerical simulation and the field measurement are used to study the impact hazard of the coal rock layer,the change of the force in the excavation process and the monitoring and control technique of the rock burst.The samples of coal rock layer of 4302 working face are collected,then mechanical parameters are obtained by mechanical experiments,and combined with the impact tendencies theory,dynalic failure time,impact energy index,elastic energy index and uniaxial compressive strength are used to analyze the impact tendency of coal seam.Discriminating the impact tendency of the top and bottom slate by using the energy index of rock bending.The Fisher discriminant model is established to determine the coal seam impact tendency,and the Fisher model is trained by the data of similar mine coal samples,and the Fisher discriminant function is obtained.The training data is brought into the function verification,and the classification function is applied to the 4302 working face to distinguish the danger risk category belonging to the coal sample.The magnitude and range of stress during excavation and mining of 4302 working face are analyzed by numerical simulation,and the stress disturbance is analyzed from horizontal and vertical views by combining the geological data of the working face and the lechanical properties of coal and rock.On the basis of the theoretical analysis and the stress concentration area found by the numerical simulation,the monitoring and early warning and prevention technology of rock burst pressure are put forward,and the veracity of the danger zone is found out by the microseismic event verification.