Support Technical Study Of Roadway For Fully-mechanized Mining With Top-coal Caving Under Complex Conditions

As for the headentry support technical problems that Softrock of Coal , complex-overburden structure and huge section for driven roadway along goaf on fully-mechanized sublevel caving mining, Based on the engineering background in the 1201(3) working face of HuaiNan mining corporation, with research method of mechanical theoretic analysis, computer numeric simulation and measuring on the spot and other approaches, the paper makes a in-depth research on the mechanism of controlling surrounding strata for the fully mechanized mining face , this text has describrd Deformation mechanism of surrounding rock and theoretical analysis of stability for gob-side entry of fully-mechanized caving face , Stress field feature of surrounding rock for gob-side entry of fully-mechanized caving face , Deformation character of surrounding for gob-side entry of fully-mechanized caving face,put forword adopting high-strength bolt to restrict the deformation of the surrounding rock, keep the surrounding rock steady,prevent comples roofs to destroy and coluntarily protect the surrounding rock, adopt the pretension cable to strengthen and suspend the unstable comples roof to the deeply stability rock stratum of the roof;analyses the migration mechanism of overlying formation of fore-and-aft mining, and the stability influence of roof-floor rock, gains the stress distribution of plastically deforming area form the elasto-plastic stability of coal pillar . With whole roadway as a object to reinforce surrounding rock,the paper take effective controlling measure control roadway for fully-mechanized mining with top-coal caving under complex conditions with bolt-mesh-anchr support technology,The research has been successfully applied in practice.