煤矿安全2024，Vol.55Issue(3)：222-230,9.DOI:10.13347/j.cnki.mkaq.20230776
煤岩变形破坏电荷感应规律试验研究及现场应用
Experimental study and field application of charge induction law in coal rock deformation and failure
摘要
Abstract
It is of great significance to accurately grasp the charge induction law of rock mass during load failure process for the pre-diction of dynamic disasters such as rock burst.On the basis of optimizing and improving the acquisition accuracy of charge monitor,laboratory monitoring tests were carried out on the charge induction rule of sandstone samples under uniaxial compression failure un-der load,and underground monitoring tests were carried out.The relationship between charge induction,stress drop and crack growth of sandstone samples under different loading rates and the charge induction characteristics in the area affected by abutment pressure of advanced working face were analyzed in detail.The research shows that:the formation,development and propagation of cracks are accompanied by charge induction signals during the process of loading failure,and the generation of precursor charge sig-nals is earlier than the stress drop caused by loading failure.Under the loading rates of 0.005 mm/s,0.015 mm/s and 0.020 mm/s,the law of charge signal in the failure process of rock samples varies with the loading rate.The higher the loading rate is,the richer the charge signal is,and the precursory charge signal appears more early.Field monitoring found that the maximum value of the average induced charge at each measuring point was located in the influence area of the advanced abutment pressure,and the average in-duced charge was consistent with the distribution trend of the advanced abutment pressure on the working face.关键词
电荷监测仪/岩体破坏/电荷感应/电荷信号/非接触式预测Key words
charge monitoring instrument/rock mass failure/charge induction/charge signal/non-contact prediction分类
矿业与冶金引用本文复制引用
赵洪瑞..煤岩变形破坏电荷感应规律试验研究及现场应用[J].煤矿安全,2024,55(3):222-230,9.基金项目
国家自然科学基金-国家和辽宁省联合基金资助项目(GrantU1908222) （GrantU1908222）
