煤矿安全2017，Vol.48Issue(4)：219-222,4.DOI:10.13347/j.cnki.mkaq.2017.04.057
特厚煤层巷道锚杆锚索预紧力对支护结构稳定性的影响
Influence of Bolt and Cable Anchor Pre-tension Stress on Stability of Support Structure in Extra Thick Coal Seam Roadway
摘要
Abstract
Taking the extra thick coal seam in Jindi Mine project as the background,using the finite element software FLAC3D and actual measurement analysis to study the influence of pretention force on the stability of roadway support structure properties in thick coal seam.The research shows that the increase of bolt pretention force can effectively reduce the layers separation of shallow roof surrounding rock,and the increase of cable anchor pretention force can make couple between shallow roof supporting beam and deep supporting arch;exerting a reasonable cable anchor pretention force can improve the bearing capacity of the composite beam by 113.74％;for extra thick coal seam roadway,the reasonable value of the bolt pretention force is 60 kN,and the cable anchor is 150 kN;when the pretention force is too small,it can not be formed a stable bearing structure above the roof;when the pretention force is too large,it is easy to cause bolt and cable anchor failure or damage.Tbe application shows that reasonable pretension force can make the roadway support structure stable and have a good support results.关键词
特厚煤层/预紧力/巷道稳定性/巷道支护/锚杆支护/锚索支护Key words
thick coal seam/pretension force/roadway stability/roadway support/bolt support/cable anchor support分类
矿业与冶金引用本文复制引用
张锁,苏学贵,杨宗一,杜献杰,王堂,张赞..特厚煤层巷道锚杆锚索预紧力对支护结构稳定性的影响[J].煤矿安全,2017,48(4):219-222,4.基金项目
国家自然科学基金资助项目(51274145) （51274145）
山西省自然科学基金资助项目(2015011066) （2015011066）
