Influence of Power Characteristics of Explosives on Strength Properties of Pieces of the Blown-up Mountain Weight
Being an initial link in a technological chain of minerals production and processing,drilling-and-blasting works,in many respects define the subsequent operations efficiency and in particular,crushing and sorting complex functioning.On rubble production pits this communication is traced in an uncontrollable elimination grade yield.Explosion action on the destroyed massif leads to strength characteristics decrease in the destroyed rock pieces which can significantly influence the volume of a sub-standard production yield.The present work is devoted to research of power characteristics of the explosives,used for rocks destruction,influence on blown-up rock pieces strength characteristics.Model experiment of a single cylindrical charge explosion process in the blast hole for the purpose of destroyed rock pieces in shotpile strength properties dependence establishment taking into account destruction zones from explosive power characteristics is considered.For numerical calculations justification model experiments are made on special equivalent-material concrete blocks.On the basis of pilot studies the process picture of the block destruction by various power charges is received.Results of the executed model experiments allow to establish connection between the samples (in shotpile) physicomechanical properties decrease of the blown-up rock from various zones of destruction and power characteristics of applied explosive.
model experiment power parameters strength characteristics rocks explosion explosives charges destruction zone
G.P.Paramonov V.A.Isheysky
National mineral resources university University of mines,Russia
国际会议
The 4th Asian-Pacific Symposium on Blasting Techniques(第四届亚洲太平洋地区爆破技术研讨会)
深圳
英文
161-165
2014-11-01（万方平台首次上网日期，不代表论文的发表时间）