Study On Surrounding Rock Control Technology For Gob-side Entry Retaining Of Fully-mechanized Caving Face In Yu Wu Coal Mine

Taking gob-side entry retaining of N2105fully-mechanized caving face in YuWu Coal Mine as the engineering background, using methods of theoretical analysis,numercal simulation and field test, systematic study on surrounding rock controltechnology for gob-side entry retaining of fully-mechanized coal face, main researchharvests are as follows:(1) Studied the fully-mechanized caving face surrounding rock stress distributionand deformation characteristics, analyzes the influence of top coal gob rock and topcoal movement law for the control of mechanized caving rock steady gob provides atheoretical basis..(2) For fully-mechanized top coal caving face roadway stress environment iscomplex, the surrounding rock conditions, especially the broken loose top coal, lowintensity, the lane support control principle, the dynamic design method, throughanalysis and comparison, to determine a reasonable Lane basic support parametersand entry in strengthening support parameters.(3) Studied support resistance lane beside filling body, analyzed the stability ofthe next lane filling body to determine a reasonable Lane offshoot high waterretaining material parameters..(4) According to research carried out in front of industrial test, through on-sitemine pressure monitoring data show that the proposed lane basic technical support,technical support and strengthen lane roadway offshoot protection technologyeffectively controlled the left mechanized caving Lane rock deformation, the resultsof this study validate the correctness and reliability.