ارزﯾﺎﺑﯽ ﻋﻮاﻣﻞ ﻣﻮﺛﺮ ﺑﺮ ﺳﺎﯾﺶ ﺳﺮﻣﺘﻪﻫﺎي ﺳﻪﻣﺨﺮوﻃﯽ دوراﻧﯽ دﺳﺘﮕﺎهﻫﺎي ﺣﻔﺎري در ﻣﻌﺎدن روﺑﺎز- ﻣﻄﺎﻟﻌﻪ ﻣﻮردي

Evaluation of factors affecting in tricone rotary bits wear of drilling machines in Open Pit Mines - A Case Study

اﺳﺘﺨﺮاج و ﺑﻬﺮهﺑﺮداري ﯾﮑﯽ از ﺑﺨﺶﻫﺎي ﻣﻬﻢ در ﺣﻮزهي ﻣﻌﺎدن و ﺻﻨﺎﯾﻊ ﻣﻌﺪﻧﯽ اﺳﺖ. ﺣﻔﺮ ﭼﺎلﻫﺎي اﻧﻔﺠﺎري اوﻟﯿﻦ ﻣﺮﺣﻠﻪ از ﭼﺮﺧﻪي ﺗﻮﻟﯿﺪ در ﻣﻌﺎدن روﺑﺎز ﻣﯽﺑﺎﺷﺪ ﮐﻪ ﻗﺴﻤﺖ ﻋﻤﺪهاي از ﻫﺰﯾﻨﻪﻫﺎي اﺳﺘﺨﺮاج را ﺑﻪ ﺧﻮد اﺧﺘﺼﺎص ﻣﯽدﻫﻨﺪ. ﺳﺮﻣﺘﻪﻫﺎ ﺑﻪ ﻋﻨﻮان ﯾﮑﯽ از ﺣﺴﺎسﺗﺮﯾﻦ و ﻣﻬﻢﺗﺮﯾﻦ ﻗﺴﻤﺖﻫﺎي ﺣﻔﺎري در ﻓﺮآﯾﻨﺪﻫﺎي ﻋﻤﻠﯿﺎﺗﯽ، ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ ﻧﻮع ﮐﺎرﺑﺮد و ﻫﺰﯾﻨﻪﻫﺎي ﺑﺎﻻي ﺗﻤﺎم ﺷﺪه از اﻫﻤﯿﺖ ﺑﺴﯿﺎر ﺑﺎﻻﯾﯽ ﺑﺮﺧﻮردار اﺳﺖ. ﺳﺎﯾﺶ و ﻓﺮﺳﻮدﮔﯽ اﯾﻦ اﺑﺰار ﭘﺎراﻣﺘﺮ ﻣﻬﻤﯽ ﺑﺮاي ﺑﺮآورد ﮐﺎراﯾﯽ ﺗﺠﻬﯿﺰات ﺣﻔﺎري در ﭘﺮوژهﻫﺎي ﻣﻌﺪﻧﯽ اﺳﺖ. ﺳﺎﯾﺶ ﺳﺮﻣﺘﻪﻫﺎي ﺣﻔﺎري ﺗﺎﺑﻊ ﻋﻮاﻣﻞ ﻣﺨﺘﻠﻔﯽ اﺳﺖ ﮐﻪ ﺑﺮﺧﯽ واﺑﺴﺘﻪ ﺑﻪ ﻣﺎﺷﯿﻦآﻻت، ﭘﺎراﻣﺘﺮﻫﺎي ﻋﻤﻠﯿﺎﺗﯽ و ﭘﺎراﻣﺘﺮﻫﺎي ﻣﺪﯾﺮﯾﺘﯽ و ﺑﺮﺧﯽ ﺗﺎﺑﻊ ﺷﺮاﯾﻂ و ﺧﺼﻮﺻﯿﺎت ﻣﺎده ﺳﻨﮓ و ﺗﻮده ﺳﻨﮓ و ﻣﺤﯿﻂ اﻃﺮاف اﺳﺖ. ﺑﺮرﺳﯽ ﭘﺎراﻣﺘﺮﻫﺎي ﻣﺆﺛﺮ ﺑﺮ ﺳﺎﯾﺶ ﺳﺮﻣﺘﻪﻫﺎ ﻣﯽﺗﻮاﻧﺪ ﺑﺎ ﮐﺎﻫﺶ اﺛﺮات ﺳﺎﯾﺶ، از ﻫﺪر رﻓﺘﻦ زﻣﺎن و ﻫﺰﯾﻨﻪﻫﺎي اﺿﺎﻓﯽ وارد ﺑﺮ ﻓﺮآﯾﻨﺪ ﺣﻔﺎري ﺟﻠﻮﮔﯿﺮي ﻧﻤﺎﯾﺪ. ﻟﺬا در اﯾﻦ ﺗﺤﻘﯿﻖ ارزﯾﺎﺑﯽ ﻋﻮاﻣﻞ ﻣﻮﺛﺮ ﺑﺮ ﺳﺎﯾﺶ ﺳﺮﻣﺘﻪﻫﺎي ﺳﻪﻣﺨﺮوﻃﯽ دوراﻧﯽ در ﻣﻌﺪن ﻣﺲ ﺳﺮﭼﺸﻤﻪ ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺘﻪ اﺳﺖ. ﺑﺮاي اﯾﻦ ﻣﻨﻈﻮر اﺑﺘﺪا ﺳﺎﯾﺶ ﺳﺮﻣﺘﻪﻫﺎي ﺳﻪﻣﺨﺮوﻃﯽ دوراﻧﯽ از ﻃﺮﯾﻖ اﻓﺖ وزﻧﯽ ﻣﺤﺎﺳﺒﻪ ﺷﺪه و ﺑﺎ ﺗﻌﯿﯿﻦ ﭘﺎراﻣﺘﺮﻫﺎي ﻣﻮﺛﺮ، ارﺗﺒﺎط ﺑﯿﻦ اﯾﻦ ﻋﻮاﻣﻞ و ﺳﺎﯾﺶ ﺳﺮﻣﺘﻪﻫﺎي ﺳﻪﻣﺨﺮوﻃﯽ دوراﻧﯽ از ﻃﺮﯾﻖ روش آﻣﺎري ﺗﻌﯿﯿﻦ ﺷﺪه اﺳﺖ. ﺳﭙﺲ ﺑﺎ اﺳﺘﻔﺎده از ﺗﺤﻠﯿﻞ ﺣﺴﺎﺳﯿﺖ ﻣﻘﺪار ﺗﺎﺛﯿﺮ ﭘﺎراﻣﺘﺮﻫﺎي ورودي ﺑﺮ روي ﻫﺪف ﺗﻌﯿﯿﻦ ﺷﺪه اﺳﺖ. ﻧﺘﺎﯾﺞ اﯾﻦ ﺗﺤﻠﯿﻞﻫﺎ ﻧﺸﺎن ﻣﯽدﻫﺪ ﮐﻪ ﺗﻤﺎﻣﯽ ﭘﺎراﻣﺘﺮﻫﺎي ﺗﺤﻘﯿﻖ ﺑﻪ ﻏﯿﺮ از ﺷﺎﺧﺺ ﺷﺪت دﮔﺮﺳﺎﻧﯽ ﺷﯿﻤﯿﺎﯾﯽ، ﺗﺨﻠﺨﻞ و ﮐﻮارﺗﺰ ﻣﺤﺘﻮي ﻣﻌﺎدل ﺳﻨﮓ ﺑﺮ روي ﺧﺮوﺟﯽ ﻣﻮرد ﻧﻈﺮ )ﺳﺎﯾﺶ ﺳﺮﻣﺘﻪﻫﺎي ﺳﻪﻣﺨﺮوﻃﯽ دوراﻧﯽ( ﺗﺎﺛﯿﺮﮔﺬارﻧﺪ و ﺗﻐﯿﯿﺮات ﮐﻮﭼﮏ در ﻣﻘﺪار آﻧﻬﺎ ﺑﻪ ﺗﻐﯿﯿﺮات اﺳﺎﺳﯽ در ﺳﺎﯾﺶ ﺳﺮﻣﺘﻪﻫﺎي ﺳﻪﻣﺨﺮوﻃﯽ دوراﻧﯽ ﻣﻨﺠﺮ ﻣﯽﺷﻮد.

Extraction and exploitation is one of the important parts in the field of mines and mining industries. Blast hole drilling is the first stage of the production cycle in open pit mines. Which account for a large part of the exploitation costs. In operational processes, bits are one of the most sensitive and important parts of drilling, due to the type of application and high costs. Wear of these tools are an important parameter for estimating the efficiency of drilling equipment in mining projects. Wear of drilling bits is a function of various factors, some of which are related to machinery, operational parameters and management parameters, and some are dependent on the conditions and rock properties and rock mass and the surrounding environment. Examining the parameters affecting the tricone rotary bits wear can prevent wasting time and additional costs of the drilling process. Therefore, in this study, the evaluation of the factors affecting the tricone rotary bits wear in Sarcheshmeh copper mine has been investigated. For this purpose, the tricone rotary bits wear has been calculated through weight loss and by determining the effective parameters, the relationship between these factors and the tricone rotary bits wear has been determined through statistical methods. Then, using sensitivity analysis, the effect of input parameters on the target is determined. The results of these analyzes show that all the parameters of the study except the Chemical Index of Alteration (CIA), porosity and Equivalent Quartz Content on the desired output (the tricone rotary bits wear).