Study on Technology of Gateway Retained Along Goaf with No Gateway Sidewall Backfill in Thin Seam
Abstract：In order to solve the support difficulties of the gateway retained along goaf with no gateway sidewall backfill, with the theoretical analysis on the surrounding rock structure of the gateway and the support principle of the gateway retained along goal, the single prop was replaced to the dense timber supports and the crossing articulated beam support method were applied to the design study of the support pa- rameters. Thus coal rejects flowed into the gateway would naturally form coal reject stacks at the gateway sidewalls to support the roof of the gateway and the construction technique was simplified. The site measuring method was applied to the analysis study on the support effect. The practice results showed that the support means effect was obvious, the max deformation value of the roof and floor in the gateway retained along goal could be controlled within 800 mm, the max deformation value of the two sidewalls could be controlled within 600 mm, and the support effect was excelent.
Keywords：thin seamno gateway sidewall backfillgateway retained along goaf coal rejects stacks along gateway sidewallssecondary mining activitiessecondary support
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 42-44 )