Study On Slurry Management And Slurry Time Variation Law In Mining Hollow Area Of Shuiquan Mine

Due to the long mining history of Shuiquan mine,various coal mining techniques have left traces in this area,forming a large range of empty areas,coupled with uncontrolled private mining,a large number of empty areas are interwoven and stacked in dense patches,seriously affecting the normal mining work.Based on the Shuiquan coal mine,this paper carries out research based on timevarying characteristics from grouting material testing to slurry diffusion law,and based on the mining void area from preliminary exploration to post-treatment technology research.Based on the basic data of physical prospecting and drilling,the hydrogeological conditions of Shuiquan coal mine are studied,and the water filling factors and possible water conduction channels are analyzed.The final precipitation time of slurry can be shortened with 1.5%～8.0% dosing,and the final precipitation time of slurry can be shortened with 10%～60% dosing of fly ash,and the density of slurry decreases and the viscosity increases with the increase of dopant proportion,and there is a certain function relationship between the thickness,density and viscosity of slurry precipitation and time;for the time-varying process,the time-varying characteristic curve is established,and the slurry thickness,density and viscosity of slurry precipitation are related to the time by the self-built model and the Pearl growth curve model and the Gompertz growth curve model,The results of comparing the self-built model with the Pearl growth curve model,Gompertz growth curve model and Logistic growth curve model show that the time variation of slurry precipitation thickness is more consistent with the power function model,the time variation of slurry density is more consistent with the polynomial function model,and the time variation of slurry viscosity is more consistent with the exponential function model;based on the time variation of density and viscosity,the slurry transport process of horizontal fracture under dynamic water conditions is simulated,and it is found that the slurry diffusion pattern is less affected by the time variation.When the time-varying law is ignored,the relationship between slurry pressure and time is chaotic,and the pressure values at different times are closely arranged;when the time-varying law is considered,the pressure values at the same time are generally larger than those when the time-varying law is ignored,the slurry pressure increases gradually with time,and the pressure values at different times near the slurry injection port are neatly arranged;based on the Based on the results of the exploration and management of Shuiquan Mine,a set of workflow for water damage prevention and control in the mining area was developed,namely the "four-step method" for exploration and release and the "four-step method" for management;the research results are of guiding significance to the water damage prevention and control in the mining area and the slurry management project.The thesis has 39 figures,31 tables and 105 references.