Study On The Ground Pressure Feature Of The Working Face And The Roadway By The Impact Of The Mining Overlying Coal Seam

This paper take the 1242(1) Fully- Mechanized face of the GuBei Coal mine of HuaiNan mining industry group as the project background. Through the theoretical analysis, the similar simulation, the computer value simulation and the scene actual research technique and so on, studied on the ground pressure feature of the working face and the roadway by the impact of the mining overlying coal seam. Utilizes the correlation theories knowledge, calculation of the overlying coal after mining, coal seam floor rock of the greatest damage depth and damage patterns.Through the similar simulation, compared the working face and the tunnel is located in the bottom of the overlying coal seam, coal pillar and the mined-out area below the bottom of the mine pressure behavior characteristics. Through the value simulation, study compared the overlying coal seam coal mining beneath the abutment pressure upon the size, the stress concentration factor and plastic zone.Through field measurement, we obtained working face and the tunnel of plastic area, cycle pressure step distance, the closer to the top and bottom, supports the work volume and hydraulic pressure resistance and other characteristics of mine under the condition of three kinds. The results provide guidance and reference for the follow-up 11-2 GuBei Coal mining design, working face stent selection, tunnel ahead of the basic support for the conservation and strengthening of supporting design and production management.Figure [58] table [38] reference [57]...