Studying On Movement Rule Of Overlying Strata And Support Selection Of Selian No.2Mine2-2Middle Coal Layer

According to the Inner Mongolia two2-2coal mine specific geological conditions, the hydraulic movement of overlying strata in mining and working face support selection of overburden rock under the condition of weak bonding thin coal seam.This paper uses a similar simulation research method combining experimental and numerical analysis of mining pressure and strata movement regularity.Theoretical analysis of the reasonable support resistance and support selection of working face hydraulic support.Using the similar material simulation experiment, the model is established on the basis of color even two2-2coal mine specific geological condition is true, objective and simulate the2-2coal mining working face overburden strata movement and failure process.Through the analysis of the model of measuring point, the feature of pressure in weakly bonded roof condition, thin seam mining working face roof subsidence and strata pressure relatively severe large ore.According to the color even two ore2-2coal specific geological and mining conditions, through the three dimensional numerical simulation software FLAC3D to establish calculation model. Simulation of2-2coal surface mining, in the vertical distance of different rock stress distribution, overburden rock level vertical displacement distribution and stress distribution, overburden rock level vertical displacement distribution and stress distribution, and compares the mobile working face overburden above under various conditions,rules and characteristics of caving.Combined mining and ore weakly caking overburden thin seam pressure characteristics and Analysis on the relationship between support and surrounding rock, the reasonable working resistance of support to the work surface is calculated, and the selection principle of the thin coal seam support, support type comparison determination of hydraulic support other technical parameters of working face, and to determine the working face hydraulic support model suitable for ZY10000/14/28final.And through the exploitation of a western mining thin coal seam mine pressure observation example,comparative analysis of the study weakly caking of overlying strata pressure behavior law of thin seam mining working face mining, provide guidance and support for2-2in coal mining.The research results of this paper can provide some theoretical guidance for the site, which is meaningful color even mining and working face mining two2-2coal support selection.