Study On Strata Behavior Patterns Of Fully-mechanized Coal Mining With "Hilt Patten" Coal Face

Based on the geological condition of "Hilt Patten" coal face of1622(3) coal face in the third western mining area of Pansan mine, this paper takes a systimatic ananysis on the mine strata pressure behavior law by combining field investigation and field measurement,numerical modeling method,theoretical analysistogether. The systimatic ananysis enclude variable long face extracted stope coal seam,stability of roadway, Strata movement regularity and so forth. The main results are as follows:1、Disposaled and analyzed the1622(3) coal face geological data and the physical and mechanics data of the working face’s coal and rock mass, haved test analysis properties of the mining coal rock mass.2、Establish stope model by using Flac3D, reveal the variable long working face stress distribution and evolution; From the pressure arch theory, this paper demonstrates the "Hilt Pattern" face pressure arch distribution before and after the docking, transfer process the evolution of the arch foot3、Through the mineral pressure observation, by having comprehensive comparison of the Variable face mining and mining in different long face, concluded that appeared stope mining pressure law has long face effection, appeared in stope face butt area pressure is particularly acute.4、Put forward the reasonable control of mining height are broken, mining speed control, ensure the supporting measures such as initial supporting force, ensure the safe and efficient mining of the "Hilt Patten"working face.