تخمين پارامترهاي موثر بر قابليت انفجار به روش زمين آمار در معدن شماره 1 سنگ آهن گل گهر

Estimation of blasting index parameters at Gol-e-Gohar iron ore mine using geostatistcs

در ﻋﻤﻠﯿﺎت ﻃﺮاﺣﯽ ﺣﻔﺎري و اﻧﻔﺠﺎر ﺑﻪ ﻣﻨﻈﻮر ﺧﺮداﯾﺶ ﻣﻨﺎﺳﺐ ﺳﻨﮓ و ﮐﺎﻫﺶ ﻋﻮارض ﺟﺎﻧﺒﯽ ﭘﺲ از اﻧﻔﺠﺎر دوﮔﺮوه ﻋﻮاﻣﻞ ﻗﺎﺑﻞ ﮐﻨﺘﺮل و ﻏﯿﺮ ﻗﺎﺑﻞ ﮐﻨﺘﺮل ﺑﺎﯾﺴﺘﯽ در ﻧﻈﺮ ﮔﺮﻓﺘﻪ ﺷﻮد. در اﻏﻠﺐ ﻃﺮاﺣﯽ ﻫﺎي اﻟﮕﻮﻫﺎي اﻧﻔﺠﺎر، ﻓﻘﻂ ﺗﻌﺪاد ﻣﻌﺪودي از ﭘﺎراﻣﺘﺮﻫﺎي ﻣﻮﺛﺮ ﻗﺎﺑﻞ ﮐﻨﺘﺮل در ﻧﻈﺮ ﮔﺮﻓﺘﻪ ﺷﺪه ﮐﻪ اﯾﻦ اﻣﺮ ﻣﻨﺠﺮ ﺑﻪ اﻧﻔﺠﺎر ﻧﺎﻣﻄﻠﻮب ﻣﯽ ﺷﻮد. راﺑﻄﻪ ﻟﯿﻠﯽ" ﮐﻪ درﺳﺎل)1986( ﺑﺮاي ﻣﺤﺎﺳﺒﻪ ﺧﺮج وﯾﮋه اراﺋﻪ ﺷﺪه اﺳﺖ، روﺷﯽ ﻣﺒﺘﻨﯽ ﺑﺮ ﻋﻮاﻣﻞ ﻏﯿﺮﻗﺎﺑﻞ ﮐﻨﺘﺮل اﺳﺖ ﮐﻪ در آن ﻣﺸﺨﺼﺎت ﺗﻮده ﺳﻨﮓ و ﻣﺎده ﺳﻨﮓ ﻣﺎﻧﻨﺪ ﺷﺮاﯾﻂ زﻣﯿﻦ ﺷﻨﺎﺳﯽ ﻣﻨﻄﻘﻪ، ﻣﻘﺎوﻣﺖ، ﺳﺨﺘﯽ، ﭼﮕﺎﻟﯽ ﺗﻮده ﺳﻨﮓ و ﺷﺮاﯾﻂ درزه دارﯾﺪر ﻧﻈﺮ ﮔﺮﻓﺘﻪ ﺷﺪه اﺳﺖ. در اﯾﻦ ﺗﺤﻘﯿﻖ اﺑﺘﺪا ﭘﺎراﻣﺘﺮ ﻫﺎي ﻣﻮﺛﺮ ﺑﺮ راﺑﻄﻪ ﻗﺎﺑﻠﯿﺖ اﻧﻔﺠﺎر ﻟﯿﻠﯽ" در ﻣﻌﺪن ﺳﻨﮓ آﻫﻦ ﮔﻞ ﮔﻬﺮ ﺑﺮداﺷﺖ ﺷﺪه و ﺑﺎ اﺳﺘﻔﺎده از روش زﻣﯿﻦ آﻣﺎر ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺘﻪاﻧﺪ. در ﻧﻬﺎﯾﺖ ﻣﺪل ﮐﺮﯾﺠﯿﻨﮓ" ﺑﺮاي ﻫﺮ ﭘﺎراﻣﺘﺮ ﺗﻬﯿﻪ ﺷﺪ ﺗﺎ ﺑﺘﻮان ﺑﺪون ﻧﯿﺎز ﺑﻪ ﺑﺮداﺷﺖ ﻫﺎي ﺻﺤﺮاﯾﯽ و آزﻣﺎﯾﺸﮕﺎﻫﯽ ﭘﺮ ﻫﺰﯾﻨﻪ و زﻣﺎن ﺑﺮ، ﺑﺮاي ﻫﺮ اﻧﻔﺠﺎر ﺷﺎﺧﺺ ﻗﺎﺑﻠﯿﺖ اﻧﻔﺠﺎر را ﻣﺤﺎﺳﺒﻪ ﮐﺮد و ﺑﺮاﺳﺎس رواﺑﻂ و ﻧﻤﻮدارﻫﺎي ﻣﻮﺟﻮد ﻃﺮاﺣﯽ اﻟﮕﻮي اﻧﻔﺠﺎر را ﺑﺮاﺳﺎس آن اﻧﺠﺎم داد.

In blasting pattern design, two controllable and uncontrollable parameters are involved. In most of the methods suggested for blast pattern design, only limited controllable parameters are considered, which in return leads to undesirable results. Lilly (1986) presented an equation based on the rock mass characteristics to obtain powder factor for a blast. In this research, at the first step, based on the Lilly equation and field study at Gol-e-Gohar iron ore mine, the parameters involved in this equation were obtained and geostatistically were analyzed. In the next step, Kriging model for each parameter was obtained, which can be used to find blasting index for each blast without carrying out expensive field tests.