The Optimization Study On High-Level Entry For Gas Extraction Of 205 Face Of Tingnan Mine Coal

As coal mining strength and mining depth increases, universal application of modern mining equipment, as well as the promotion of advanced mining technology, mine production continues to increase. With the upgrading of coal production, gas also increases the degree of harm, coal mine gas control and safety production is facing greater challenges.Basis on the reseachs in large mining height affected by domestic and foreign mining overlying rock stress distribution and the evolution and distribution of gas migration, research fissures of science based coal mining, mining pressure and strata control study, mining rock hydrodynamics theory, numerical simulation, and live performance validation study as follows:Based on previous results of a large number of Theoretical and Experimental Research,Combined occurrence conditions and mining technology of 205 Face in TingNan mine coal.Utilized Empirical formula of three zones after the height of overburden rock damage calculations,According crack evolution and gas migration law and Analysis of the pressure relief gas gathering area is located between the fractured area with separation serious fault with the general fault.we also measured the impact of coal mining face in rock mechanics parameters and used FLAC3 D software to dimensional mathematical model for 205 Face.Using "SS" model for numerical calculation,Researching overburden stress field,displacement field and Distribution of seepage field.We conclude the following results that the reasonable relief drainage layers on the seam roof is 13-20 meters.Based on the measured 205 Face Gas basic parameters,it forecasts the amount of gas emission,analysis the source of the working face gas and makes the gas control program.using of theoretical calculations and numerical simulation results,205 high pumping Lane arranged layers is reasonably adjusted, high pumping 205 mining roadway during gas drainage volume reached 8.66m3 / min, eliminated the working face and the corner gas gauge, and reduced Face Gas emission.It protected the Face of production safety.