Research on Stability Optimization of the"Support-Surrounding Rock"System in Coal Mine Fully Mechanized Caving Face
In view of the problems of poor stability and urgent need for optimization of the fully mechanized caving face system in Shengli Coal Industry,taking the"support-surrounding rock"system of the 120210 fully mechanized caving face of Shengli Coal Industry as the entry point,numerical simulation is conducted on the coal seam of this fully mechanized caving face.Combined with mine pressure monitoring analysis,the characteristics of the"support-surrounding rock"system in large inclination angle fully mechanized caving mining,such as the working face inclination angle,support working status,roadway deformation and failure,and others are studied.The coal mining parameters,coal caving process zoning,and stability of the"support-surrounding rock"system in different areas of the fully mechanized caving face are optimized.After optimization,the average monthly production capacity of the working face reaches 253 800 tons,the highest monthly production reaches 344 800 tons,the recovery rate increases by 12%,and the mining operation efficiency reaches 16.7 t/d.Compared with before adjustment,the annual output value increases by 183.5 million yuan,15.4%higher than that before the adjustment.
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