Application technology of ultra high-water material in coal mine
Sun Chundong
Liu Shulun
Li Jisheng
Abstract：Based on the basic characteristics of ultra high-water materials,such as early strength,strength adjustable and re-cementing,in view of the practical problems encountered in the process of coal mining,the development of ultra-high water slurry process,super high water material filled with hydraulic support.The application of ultra-high water materials in the new technology fields such as coal mining,gob-side entry retaining,ground pit grouting reinforcement,goaf fire prevention and control technology,and "two-step-method" grouting transfortion.The results showed that the activity of the overburden strata in the goaf was smooth and the apparent pressure was not obvious in the mined-out area,and the filling effect was better.The ultra-high water material was used for the fire-not only play the role of isolation of the air,but also to prevent the evaporation of harmful gases,reducing the concentration of toxic and harmful substances in the air,reducing the amount of materials,reducing the filling costs.The application technology of ultra-high water material as a new type of mine filling material in coal mine had been basically mature.
Keywords：ultra high-water materialcoal mining with fillinggrouting reinforcementgob-side entry reatainingfire prevention
Publication Date：2017-01-01
Pages：6( 42-47 )