Experimental Study On Non-hydraulic Prop In Roadside Support For Gob-side Entry Retaining

Based on the background of engineer research of the8201working face (HaohuaChanggouyu Co., Ltd. and take full account of the merger and reorganization of newlyremodeled mine actual production, weak economic conditions, according to the surveyresults, the8201Face select forward style pillars along goaf mining plan, to improvethe recovery rate of coal resources, reduce the rate of roadway excavation to ease thetense relations of the mining and energy saving mine to have a significant effect.Edge togoaf technology as decided the programs success of the implementation of the keyfactors, by the the alley off support and Lane offshoot care both common role. Alley offsupport because the anchor net rod Anchor Combined Support good application anddevelopment in our country, has gradually mature; Lane offshoot of care as a key part ofthe technology along goaf, its ability to adapt to the roadway above the roof movementlaw and effective control of the roof strata will determine the success or failure of thetechnology along goaf. Lane the offshoot care of the form and use of the material a lotof mine the actual mining conditions and economic conditions, and ultimately nohydraulic prop is selected as a stay along the empty alley the offshoot protectionmaterials.At the present stage of gob-side roadway support mainly adopts hydraulic prop,because of its convenience, the advantages of roadway are widely used. But when theworking face longer need a lot of use, the huge cost, at the same time, the traditionalhydraulic pillar belongs to passive support, reflects the support characteristics not earlier.So we can find a kind of low cost, but also can ensure a good supporting material activesupporting performance, is the main content of the research. Aiming at these problems,puts forward without hydraulic pillar roadway support scheme. The selection techniqueof steel, concrete, steel and other materials as the support, through the research of theperformance and stability of the force, feasibility to study without hydraulic propapplication. Laboratory experiment and numerical simulation show that the trial, nohydraulic support in gob-side roadway support in support of good performance, whichin the future along with the potential to leave empty roadway technology in development.In this paper, with non-hydraulic prop supporting performance as the researchobject, basic analysis, in the early stage of theoretical calculation and design parameters,laboratory test and Numerical Simulation Research on combining, for without the use ofhydraulic prop supporting technology after8201gob-side entry structure characteristicsof the surrounding rock and the stability, regularity of strata behavior, along changes ofgob-side entry retaining mining technology and other aspects of the in-depth studiedand discussed. The results show that, without the use of hydraulic props supportingtechnology can effectively control the deformation of surrounding rock of roadway,roadway support effect is good, but also can achieve better economic results, providestechnical guarantee for the safe and efficient production of8201working face, providestheory and experience for the technical innovation, achieve the high yield and highefficiency mine requirements.