采矿与安全工程学报Issue(1)：22-27,6.
综放工作面沿空开切眼布置与支护技术研究
Arrangement and support technology of open-off cut along gob area in fully mechanized caving face
摘要
Abstract
Open-off cut along gob area of fully mechanized caving face has the characteristics of large span, large thickness of top coal, small coal pillar along gob area, soft surrounding rock and fracture development, so, its support is difficult. In this paper, in view of the open-off cut along gob area with 8 m in width, and 5.6 m in thickness, by using theoretical analysis, numerical simulation, field test and monitoring analysis, the remaining principle of coal pillars and pillar stress distribution characteristics were studied, and the coal pillar width was optimized. In addition, the support mechanism of open-off cut along gob area was analyzed, and the supporting schemes including the anchor net belt combined with anchor cable, and the anchor net belt with truss and anchor rope were designed and tested. The re-sults show that the rational width of coal pillar is around 4~5 m, and the two supporting schemes of anchor net belt combined with anchor cable and truss and anchor rope, respectively, can improve the forced state of top coal and the bearing capacity of surrounding rock, effectively control the bed separa-tion, fracture propagation, bending and subsidence of large span and thick top coal, and ensure the sta-bility of open-off cut along gob area of fully mechanized caving face.关键词
综放工作面/沿空开切眼/煤柱宽度/支护机理/锚网带锚索/桁架锚索Key words
fully mechanized caving face/open-off cut along gob area/coal pillar width/support mechanism/anchor net belt with anchor cable/truss and anchor rope分类
矿业与冶金引用本文复制引用
蒋力帅,马念杰,赵志强,贾后省..综放工作面沿空开切眼布置与支护技术研究[J].采矿与安全工程学报,2014,(1):22-27,6.基金项目
国家自然科学基金煤炭联合基金项目(51134018)；国家自然科学基金项目(51234005) （51134018）
