Deformation Prediction Of Strip Mine Dongrong Three Working Face Mining Design And Surface Filling

Aiming at the questions of huge three under mining pressure coal of Dongrong Coal Mine,the paper carry out the characteristics of surface deformation of the strip filling and filling wall after making a thorough study on the accumulation of basic data,for further improving mining research results have guiding significance.In Dongrong Three Mine specific geological and mining conditions and the actual production condition,the gangue filling coal mining face strip mining layout design,and to determine the gangue filling and mining system.According to the measured data of Dongrong three mine and statistical data to determine the surface backfill mining deformation prediction of rock movement parameters and geometric parameters.By means of probability integral method,the surface deformation under the whole filling and partially filling scheme of strip filling face is predicted respectively.The prediction results show that the surface deformation after partial filling is more than the surface deformation after filling,but the surface deformation of the two filling methods meet the first class protection standards.The partial filling ratio increased 27.6%,the slope value increased by 22.4%,the curvature value increased by 18.2%,the horizontal movement value increased by 25.2%,and the horizontal deformation value increased by 32.4%.Using the inverse prediction software has been full rate for each surface deformation the deformation value of 40.1%in the level of protection of the standard range,and caving method mining ground deformation prediction results were compared,the caving mining ground deformation of each deformation value is 40.1%when the full rate of sinking value increases 20.3%tilt,value increased 27.7%,the curvature value increased 21.3%,the level of mobile value increased by 25.9%,the level of deformation value increased by 7.5%.Finally,the surface deformation monitoring scheme of the strip filling face is designed.The results of the research on mine gangue backfill mining in Dongrong three,environmental improvement,and the filling surface has high buildings protection significance and theoretical significance.