黑龙江科技学院学报2016，Vol.26Issue(6)：596-600,611,6.DOI:10.3969/j.issn.2095-7262.2016.06.002
“三软”煤层回采巷道的中空注浆锚索支护
Support research of hollow grouting anchor cable in three soft coal seam mining roadway
毕业武 1范秀利1
作者信息
- 1. 黑龙江科技大学安全工程学院 哈尔滨150022
- 折叠
摘要
Abstract
This paper aims to address a large deformation disaster of the surrounding rocks occurring in "three soft" coal seam mining roadway.The study building on the typical case of " three soft" coal seam mining roadway in Yan'nan mine belonging to Da3an mining area involves adopting numerical simulation method by FLAG31D to analyze the law behind the displacement and stress distribution of mining roadway surrounding rock under the condition of hollow grouting anchor cable support and anchor net cable belt support.The comparative analysis suggests that compared with anchor net cable belt support,the hollow grouting anchor cable support provides a 53.5 mm decrease (26.6％)in maximum displacement of roof and floor of mining roadway;an 80.0 mm decrease (33.3％) in the maximum displacement of two sides of mining roadway;a 0.7 MPa decrease in the maximum horizontal stress;and a 0.7 MPa decreases in maximum vertical stress.It follows that the hollow grouting anchor cable support can offer both the best support method and the optimum support parameters designed for the practical engineering.The industrial field test proves that hollow grouting anchor cable support affords a remarkable economic and technology effect by decreasing the roadway surrounding rock deformation from original 1 129 mm to about 265 mm.The study may provide a new control method for surrounding rocks of "three soft" roadway support under similar conditions.关键词
“三软”煤层/回采巷道/中空注浆锚索/FLAC3DKey words
"three soft" coal seam/mining roadway/hollow grouting anchor cable/FLAC3D分类
矿业与冶金引用本文复制引用
毕业武,范秀利..“三软”煤层回采巷道的中空注浆锚索支护[J].黑龙江科技学院学报,2016,26(6):596-600,611,6.
