煤矿安全2017，Vol.48Issue(11)：206-209,4.DOI:10.13347/j.cnki.mkaq.2017.11.055
放顶煤工作面顶煤破碎机理研究现状与展望
Research Status and Prospect on Mechanism of Top Coal Broken in Longwall Top Coal Caving Face
摘要
Abstract
For the problem of the broken of top coal in the face of longwall top coal caving (LTCC),this paper analyzes the influence of depth of coal seam,thickness of coal seam,joint and fracture in coal mass,stress of abutment pressure,roof movement,bearing stress of bracket and excavation unloading effect on the broken of top coal.Based on the analysis of the research status of the mechanism of top coal broken,it is proposed that the study of the top coal broken mechanism should focus on improving the joint detection technology of top coal seam,which is to realize the in situ precise joint detection of top coal and then achieve visualization of top coal.At the same time,it is necessary to have a further study on the broken effect of bracket on top coal and propose the idea of necessary conditions for the fully broken of top coal from the energy point of view,which provides the theoretical foundation for improving the top coal fragmentation degree and the coal recovery rate.关键词
放顶煤开采/顶煤破碎机理/采出率/研究现状/外界应力Key words
longwall top coal caving(LTCC)/broken mechanism of top coal/recovery rate/research status/external stress分类
矿业与冶金引用本文复制引用
李良晖,魏炜杰..放顶煤工作面顶煤破碎机理研究现状与展望[J].煤矿安全,2017,48(11):206-209,4.基金项目
国家自然科学基金资助项目(U1361209,51674264,51574244) （U1361209,51674264,51574244）
