Studying On The Supporting Parameters Of The Paste Filling For The Gob-Side Entry Retaining In The Top Layer Of The Prominent Thick Coal Seam

The Gob-side entry retaining is the most application of the no pillaring mining, has animportant significance on the reducing the rate of tunneling, improving the coalresources, solving the highly gas mine’s upper corner gas overrunning problem,alleviating the replace nervous of the mining face and realizing the development of thecoal and gas total collection in the green mining.The paper is based on the analysis of previous on The Gob-side entry retaining minepressure appearance rule and deformation characteristics of roof strata on the basis oftheoretical research. According to the High Gassy Outburst Mine geological conditionsand structure characteristics，the lithology of coal seam roof and floor. And Proposed thegob-side entry retaining supporting scheme. Applying the technology of the bolt supporton the roadway and the strengthen bolt-cable on the roadway’s side. And set up acorresponding mechanics model, analysis the affection of roadway’s coal wall, anddeduced the formulas of the top support resistance with the bolt support and bolt-cablesupport or without. The research proved that use the bolt support on the roadway whenthe pre-driven roadway lane, could strengthening the mechanical performance,improving the ability of the inside coal’s shear and compressive. prevent coal extrusionor serious coal slide, and reduce the coal floor’s increase after the affection of theoverlaying strata’s movement; The lane with the prestressed bolt and bolt-cablestrengthening support, enhancing the mechanical properties of the roof strata, improvingthe bearing capacity of the roof strata, avoid roof’s greatly rotating down, reduce thedeformation and support pressure of the side supporting body; besides, the lane pastefilling supporting body with a highly strength, early support and increase speed ofresistance properties, to adapt the roof’s rotation sinks and the translation movement.During the gob-side entry retaining, the advanced of the working face supporting, endsupport and behind of the lane roadway’s support, is a process should not be neglected,and must be supported on time. These also guarantee the paste filling Gob-side entryretaining technology successfully apply in the outburst thick coal seam roof layer, andmust be consider and determine the basic supporting parameters. The Gob-side entryretaining technology successfully in HeBi four mine31021working face can beimplemented, and has achieved a good result, which should provide theoretical basis and practical experience to apply the Gob-side entry retaining technology in the samegeological condition.