Study On Support Technology Of Gob-side Entry For Steep Three Soft Coal Seam

In view of the characteristics of large inclination (at average angle55°), short distance ofcoal seams, how to maintain the mining case,, the scientific and practical supporting schemewas proposed by gob-side entry retaining of working face, resolved under the influence ofrepeated mining along the gob-side entry retaining supporting scheme problem is a urgent tomajor technical problems.of Zhangjiaba coal mine.In this paper, Zhao jia ba mine the+340level of306mining area9seam3964Face driftas the main object of study,,by surrounding rock loose circle test, the initial programimplementation, study on Field Test of strata control observation, the test of the mechanicalproperty of surrounding rock,Indoor Ping Li interaction loadable similar material simulationexperiment and numerical simulation, Zhao dam the Guangwang mine coal in steep seamalong the empty left the roadway deformation instability mechanism of in-depth study,Zhaodam the Guangwang mine coal in steep seam along the gob-side entry retainingdistortion andstability of mechanism of in-depth study,analysis of the gob-side entry retaining of steep seamasymmetric distortion and stability of mechanism, proposed multi-media coupling supportprograms, and has been optimized.Practice shows that: the use of high strength bolt, pallet+anchor cable+W steel strip l+mesh reinforcemenr+grouting bolt+Concrete Sprayingsupport pattern can effectively control the stability of roadway. Research design for futuresimilar projects accumulated experience...