Technology of gob-side entry retaining on its original position in fully-mechanized coalface with solid material backfilling
Abstract：Aimed at the technical difficulties of gob-side entry retaining in fully-mechanized coalface with solid material backfilling（GERFCSMB）and based on the analysis of reasonable model of surrounding-rock structure,a new technique of entry-side packing on its original position was put forward.There are three key aspects：① To organize operations of coal mining,backfilling and entry retaining reasonable in time and space at the same time;② To design reliable support form for the original entry,and ensure the density of backfilling body in the mined-out area;③ To determine the entry-side packing body form and design reinforcement for it with combination of bolt,steel strip,ladder-shaped steel and metal mesh（BSLM）.By carrying out the industrial test,the field measurement shows that the maximum displacement of two ribs is 46 mm and the maximum convergence between roof and floor is 87 mm;the backfilling body and entry-side packing body control the activities of the overlying strata together.
Keywords：coal mining with solid material backfillinggob-side entry retaining on its original positionentry-side packing body supporting
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)