Study on simulation test of similar materials of the accumulation body beside the gob roadway in Longhu Coal Mine
To carry out a physical similarity simulation test on the dynamic evolution of the accumulation body beside the gob roadway in Longhu Coal Mine,an experimental study was conducted on the proportion of similar materials.Fine river sand was selected as aggregate,calcium carbonate and gypsum were used as sizing materi-als,and an orthogonal experiment with three factors and four levels was designed.Through range analysis and multiple linear regression analysis of the dynamic and static parameters of similar materials,the influence rules of three factors on the dynamic and static parameters of similar materials were obtained.The ratio of similar ma-terials was used to conduct physical similarity simulation tests.The results show that during the process of retai-ning the gob roadway,the accumulation body next to the roadway is affected by the movement of the overlying rock strata,and its structural form is constantly changing.In the early stages of the formation of the roadside ac-cumulation,since a stable structure has not yet been formed,it has been in a state of"self-organizing adjust-ment".When the accumulation beside the roadway forms a stable structure,affected by the movement of the o-verlying rock strata,the accumulation beside the roadway may squeeze the tunnel.
ratio of similarityorthogonal testrange analysissimilarity simulation test
万方数据
维普
