矿业科学学报2024，Vol.9Issue(1)：22-31,10.DOI:10.19606/j.cnki.jmst.2024.01.003
基于能量传递效率的煤冲击倾向性评价指标
Evaluation index of bursting liability of coal based on energy transfer efficiency
摘要
Abstract
The accumulation and release of energy in coal are closely linked to rock burst,with energy transfer being a key parameter for evaluating bursting liability.This study constructs an energy transfer model under energy source disturbance conditions,where we establish a relationship between impact en-ergy index and elastic energy index,propose the proportion of energy φ,introduce the concept of energy transfer efficiency β based on an energy dissipation model during the transfer process,develop an evalu-ation method for bursting liability by multiplying two efficiency parameters η=βφ.We conducted experi-ments to identify bursting liability of 11 coal layers from 3 pairs of coal mines,whose reliability was ver-ified by referencing results from 79 layered impact tendency identifications in other coal mines.Results show that 1)the proportion of energy release φ has boundary conditions with physical significance for ground pressure;2)there is negative correlation between the efficiency β and Poisson's ratio which can model boundary conditions;3)calculation results of the energy transfer index η show high consistency(88.61%)with bursting liability identification results,reflecting the bursting liability of coal bodies.It can serve as a basis for evaluating"∗"outcomes and is an effective indicator suitable for existing sys-tems used to evaluate bursting liability.关键词
冲击倾向性鉴定/能量释放比例/能量传递效率/能量传递指数/冲击地压Key words
identification of bursting liability/energy release ratio/energy transfer efficiency/energy transfer index/rock burst分类
建筑与水利引用本文复制引用
赵阳,侯煜坤,唐铁吾..基于能量传递效率的煤冲击倾向性评价指标[J].矿业科学学报,2024,9(1):22-31,10.基金项目
国家自然科学基金(52034009) （52034009）
煤科院科技发展基金(2021CX-Ⅱ-12 （）
2021CX-Ⅱ-11) （）
