Research On Mining Safety Under Reservoir And Characteristics Of Surface Movement In Lugou Colliery

With the continuous exploitation of coal,more and more problems are presented in various mining areas.In order to liberate the coal under waterbody,we must study the mining safety under the water.First of all,the mining safety should be ensured and surface movement caused by mining was studied on the basement of mining reliability.Based on the 32101 working face in Lugou Colliery,combined with Lugou coal mine geological mining conditions and hydrogeological characteristics,by means of the field measurements and numerical calculation,the mining security and mining surface movement characteristics were studied.Based on the geological and mining conditions of 32101 working face in Lugou Colliery,the Udec numerical models were established to get the emulated “two belts”height.By analyzing the calculation results and the simulated results,the “two belts”height formula was choose in the region and the mining feasibility was analyzed,the results showed that it's safe to mine under the waterbody.And then the observation station was established as well as the surface subsidence and mining influence on water was measured in the field.Based on field measurement and probability integral method,the surface movement angle parameters were estimated,and the characteristics of surface movement and destruction were analyzed to find there only a little destruction existed on the earth surface.Finally,according to the geological conditions of 32101 working face,the influence of different working face length and the coal seam thickness on the surface movement is studied by using Udec,and the results were similar to the measured data that there was only some mild destruction.The research of this paper provided an important basis for the analysis of the surface movement and destruction characteristics of coal mining under waterbody,it also has significant impact on the mining safety.