According to the water leaching problem in front of the fully-mechanized caving face of Gaojiapu Coal Mine,the main source of water comes from the roof of the coal face,and the mine water inflow reaches 4 000-5 000 m3/h.Combined with the characteristics of coal mud deposits in the drainage roadway of the mining face,The rheological type and constitutive equation of the coal mud mixture were determined by Robinovitch-Moner equation and Hagen-Poiseuille equation,and the flow model of the coal mud and water mixture was established by large-scale loop experiment method.The sedimentation characteristics of coal mud deposits in the drainage roadway of working face in the high and low pressure section and at different shear rates were analyzed theoretically.The critical flow velocity of coal mud deposits flow under the condition of dynamic water was calculated as 1.1-1.5 m/s,and the critical flow velocity of coal mud deposits was obtained.The sedimentation mechanism of coal mud in the process of mine water flow was studied,providing theoretical ba-sis for scientific and reasonable dredging work.
关键词
大水易淤/综放工作面/大涌水/煤泥淤积物/临界流速
Key words
large water prone siltation/fully-mechanized caving face/a surge of water/coal mud deposits/critical low velocity
维普
万方数据