矿业工程研究
礦業工程研究
광업공정연구
MINERAL ENGINEEERING RESEACH
2014年
4期
37-41
,共5页
动静组合载荷%双压头%数值试验%声发射%破岩效果
動靜組閤載荷%雙壓頭%數值試驗%聲髮射%破巖效果
동정조합재하%쌍압두%수치시험%성발사%파암효과
coupled static and dynamic loads%dual -cutter head%numerical experiment%acoustic emission (AE)%rock crushing effect
应用岩石破裂过程分析软件 RFPA2D ，以脆性岩石花岗岩为研究对象，进行了对单压头和双压头在不同加载模式下的破碎数值试验，采用声发射活动作为衡量标准表征破岩效果。结果表明：所加静载较小或动载荷应力波幅值小于岩石强度时破岩效果差；动静组合载荷加载条件下单压头和双压头均能大幅提高岩石破碎效果，且单压头破岩声发射能量大于双压头；双压头动静组合载荷破岩时压头间距对破岩效果有影响。
應用巖石破裂過程分析軟件 RFPA2D ，以脆性巖石花崗巖為研究對象，進行瞭對單壓頭和雙壓頭在不同加載模式下的破碎數值試驗，採用聲髮射活動作為衡量標準錶徵破巖效果。結果錶明：所加靜載較小或動載荷應力波幅值小于巖石彊度時破巖效果差；動靜組閤載荷加載條件下單壓頭和雙壓頭均能大幅提高巖石破碎效果，且單壓頭破巖聲髮射能量大于雙壓頭；雙壓頭動靜組閤載荷破巖時壓頭間距對破巖效果有影響。
응용암석파렬과정분석연건 RFPA2D ，이취성암석화강암위연구대상，진행료대단압두화쌍압두재불동가재모식하적파쇄수치시험，채용성발사활동작위형량표준표정파암효과。결과표명：소가정재교소혹동재하응력파폭치소우암석강도시파암효과차；동정조합재하가재조건하단압두화쌍압두균능대폭제고암석파쇄효과，차단압두파암성발사능량대우쌍압두；쌍압두동정조합재하파암시압두간거대파암효과유영향。
Numerical crushing experiment of brittle rock(granite)by different load patterns under single -cutter head and dual -cutter head has been done with the rock failure process analysis software -RFPA2D . Acoustic emission activities are used to measure the rock crushing effect.Results show that (1)If the static load is too small or the stress wave amplitude is smaller than rock strength,the rock crushing effect is very poor.(2) No matter it is single -cutter head or dual -cutter head,coupled static and dynamic loads can raise the rock crushing effect substantially.In addition,the acoustic emission energy under single cutter head is more than dual-cutter head.(3)The head space has an effect on the rock crushing effect of rock crushing by combined dynamic and static loads under dual -cutter head.
