Study On The Law Of 15211 Working Face Ground Movement And Deformation In Ling Zhida Mine

This article treats the first working face which called 15211 working face of Mountain coal group Ling Zhida coal mine in second mining area as engineering background, carries on technical study on rule of ground movement and deformation in 15211 working face by means of site investigation,theoretical analysis,field measurement, numerical simulation,probability integration prediction to surface subsidence,and so on, the research indicates, the maximum ground subsidence value of 15211 working face is 3510 mm, the maximum surface horizontal displacement value is 1020 mm, carry on the settlement estimate to 15211 working surface migration distortion by using the MSDFVS software whose system is MapInfo, Expected results will intuitively present relevant parameters such as Scope of basin surface movement, maximum subsidence value, maximum value of tilt and surface move horizontally, Expected results show, maximum subsidence value of 15211 working face is 3400 mm, the maximum horizontal movement value of 15211 working face is1200 mm, Carries on the simulation analysis to surface migration distortion of 15211 working face by using Flac3 d numerical simulation software, The results showed that maximum subsidence of 15211 working face is 3500 mm, the surface movement and deformation laws which is proved out by field measurement, subsidence and numerical simulation method is basically same,which further demonstrates the accuracy of the actual data. With the Flac3 d numerical simulation software and the Matlab software, Study law of ground movement and deformation under different mining of thick, different conditions of buried depth and length of working face,research shows that,with the enlarging of the mining height, the maximum subsidence of ground surface increases, but the growth rate gradually decreases,with the increase in depth, the maximum ground subsidence value gradually decreased, but the damping decreases,with the increase of the length of the working face,in non-fully-manual stage,the maximum ground subsidence value increases gradually,in the fully manual stage,the maximum ground subsidence value remains unchanged,the surface migration basin scope further increases.Finally,sort out the research achievements,provide reference for some related subsidence problems during 15# coal mining,carry on the exploration.to promote 15# coal bed smooth mining.