The Solid-liquid Coupling Experiment Analysis Of The Desertification Preventing In The Shen-Fu Mining Area

Practice and theory study in shallow seam indicate: the water and sand fluid into face to form bursting disaster in shallow seam mining covered with thick sand layers and water, and the study has carried a lot, but the research about the contrary environment effect carried seldom. In this paper, the desolate land, water protecting mining parameter, pillar stability, and the law of the solid-liquid coupling in shallow seam mining covered with thick sand layers and water are studied in details with four methods as following: field testing, solid-liquid coupling experiment, theoretical analysis and numerical simulation. In this paper, a method to divide the protecting water region in shallow seam mining covered with sand and different rock thickness is put forward; solid-liquid coupling simulation materials are developed; the problem of the coupling of similarity ration and the visibility of different materials is solved; the limitations of single solid simulation experiment is broken in mining; the correct of simulation materials selection and reliability of experiment conclusion is proved through certification experiment. on the base of seven solid-liquid coupling experiments the possibility of protecting water mining is analyzed and the parameter for intermission mining under the different engineering geology conditions are provided, intermission mining has held back rock to be crushed and control the crack to develop to reach protecting water resources. The liquid-solid coupling phenomenon in the combinatorial key strata in shallow coal is described with the help of the method of liquid-solid theory at the first time, and the mathematical mechanical model is established, rock's destroy discrepancy has been analyzed. Applying the numerical simulation program ANSYS to analyze the stability of pillar, it proved pillar is stable. And the field mining proved the intermission mining parameter from Sponsored by Natural Science Education Fund of Country (50070423) And Natural Science Fund of Shaanxi province (99c12)experiment is correct.