%0 Journal Article
%T EXPERIMENTAL RESEARCH ON RULES OF ROCKBURST TENDENCY EVOLUTION AND ACOUSTIC-ELECTROMAGNETIC EFFECTS OF COMPOUND COAL-ROCK SAMPLES<br>组合煤岩冲击倾向性演化及声电效应的试验研究
%A LU Caiping
%A DOU Linming
%A WU Xingrong
%A <br>陆菜平
%A 窦林名
%A 吴兴荣
%J 岩石力学与工程学报
%D 2007
%I 
%X In the mining(drifting)faces and roadways,the roof,coal seam and floor all together compose a mechanical equilibrium system.When the system is disturbed by mining effect,the elastic energy accumulated in coal or rock materials can be induced to release through weak structure suddenly and rockburst will be formed.So,to monitor and forecast rockburst,and to deal with strength weakening,the rules of rockburst tendency evolution of different types of compound samples composed of roof,coal seam and floor and acoustic-electromagnetic effect will have a very important practical function.Based on a great number of experimental researches on rockburst tendency and acoustic-electromagnetic effect of compound samples,it is found that the higher the strengths of coal seam and roof samples are,the stronger the rockburst liability is;and the rockburst liability indexes increase with the height ratio of roof to coal.The higher the strength,roof height ratio and rockburst liability indexes of compound samples are,the stronger the intensity of electromagnetic emission(EME)and acoustic emission(AE)signals is.The experimental results also show that the intensity of EME and AE signals rise up slowly before rockburst failure,and increase to the maximum when rockburst precursor,and suddenly decline after rockburst.Above conclusions will have an important directive significance to weaken the strength of rockburst in field and to check the effect of relieve-shot.
%K mining engineering
%K rockburst
%K compound coal-rock
%K rockburst tendency
%K acoustic-electromagnetic effect<br>采矿工程
%K 冲击矿压
%K 组合煤岩
%K 冲击倾向性
%K 声电效应
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=D3421FAA1A0A0F0C&jid=35E747D791A1346351AFB523B7FA35CB&aid=849D20E8172A8C4EEB43124058D02042&yid=A732AF04DDA03BB3&vid=96C778EE049EE47D&iid=59906B3B2830C2C5&sid=8DE9A8A255B6D811&eid=05DCD46B802F239B&journal_id=1000-6915&journal_name=岩石力学与工程学报&referenced_num=1&reference_num=16