DOI: 10.11799/ce201806020
Failure mechanism of tectonic zone large deformation roadway and the anchor-grouting combined support technology
LI Cheng-gang
Abstract：Aiming at the serious deformation and poor safety condition of No. 3 coal seam centralized transportation roadway arranged in anticlinal axis area in Xinyuan Coal Mine, the floor heave is more than 2000mm and the two-side convergence is between 1500～2000mm in 3～5 months after the roadway constructed, based on field engineering, cause of roadway failure and the reinforcement technology of coal seam main roadway in anticline belt is analyzed, a combined support scheme is put forward using pre-stressed grouting anchor cable for the floor and separate grouting combined with pre-stressed grouting anchor cable for the ribs, the reinforcement effect is observed. The results show that, floor heave and two-side movement is easy to occur under the influence of complex tectonic stress, at the same time, roadway in coal seam is affected by the high concentrated stress of narrow coal pillar between roadways, the range of plastic areas is wide and surrounding rock is destroyed seriously, after 30 days of site construction, the largest convergences of roof to floor and two sides are 120mm and 150mm respectively and tends to stabilize, which has achieved the desired effect and realized the effective control of roadway.
Keywords：main roadwayanticlinal tectonic beltgroutingpre-stressed anchor cable
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 70-74,77 )