煤矿安全2024，Vol.55Issue(1)：28-33,6.DOI:10.13347/j.cnki.mkaq.20230409
机械扩孔煤体增透应力变化规律研究
Study on stress change law of coal body permeability improvement by mechanical reaming
摘要
Abstract
Mechanical reaming,as a new type of coal seam pressure relief and permeability enhancement measure,can be widely ap-plied to low permeability gas coal seams.In order to investigate the stress evolution law of mechanical reaming,the stress distribu-tion characteristics of mechanical reaming were revealed through theoretical analysis;taking 2616 coal seam of Juji Coal Mine as the research background,the stress evolution law of coal seam during the reaming process was analyzed by ABAQUS numerical simula-tion software.The results show that:there is a dynamic evolution of the stress field of the coal body around the hole after mechanical reaming,which is distributed in a circular pattern from inside to outside,in the order of fracture zone,plastic zone,elastic zone and original stress zone;the stress disturbance range and stress concentration in the hole-making stage during mechanical reaming are significantly larger than those in the drilling stage.关键词
瓦斯抽采/卸压增透/机械扩孔/应力分布/破煤效果Key words
gas extraction/pressure relief and permeability improvement/mechanical reaming/stress distribution/coal breaking effect分类
矿业与冶金引用本文复制引用
王海春,雷东记,代振华,覃杰..机械扩孔煤体增透应力变化规律研究[J].煤矿安全,2024,55(1):28-33,6.基金项目
国家能源集团2021年度科技资助项目(GJNY-21-132) （GJNY-21-132）
国家自然科学基金青年科学基金资助项目(51704101). （51704101）
