ﻣﻘﺎﯾﺴﮥ ﺣﺴﺎﺳﯿﺖ ﺑﻪ ﻓﺮﺳﺎﯾﺶ و ﻣﻘﺎوﻣﺖ ﺳﻨﮓﻫﺎي آﻫﮏ آﺳﻤﺎري، آﻫﮏ ﻣﯿﺸﺎن، ﻣﺎﺳﻪﺳﻨﮓ آﻫﮑﯽ آﻏﺎﺟﺎري و اﻧﯿﺪرﯾﺖ ﮔﭽﺴﺎران ﺑﺎ اﺳﺘﻔﺎده از روش RMR

Comparison of sensitivity to erosion and resistance of Asmari limestone, Mishan limestone, Aghajari calcareous sandstone and Gachsaran anhydrite using RMR method

اﻃﻼﻋﺎت ﻣﺮﺑﻮط ﺑﻪ ﻣﻘﺎوﻣﺖ ﺑﻪ ﻓﺮﺳﺎﯾﺶ و ﺗﺨﺮﯾﺐ ﺳﻨﮓﻫﺎ و رﺗﺒﻪ ﺑﻨﺪي ﺣﺴﺎﺳﯿﺖ آنﻫﺎ ﺑﺮاي اﻫﺪاف ﻣﺨﺘﻠﻔﯽ ﻫﻤﭽﻮن ﻣﻬﻨﺪﺳﯽ ﺳﺎزه و ﻧﺮخ ﻓﺮﺳﺎﯾﺶ و ﺗﻮﻟﯿﺪ رﺳﻮب ﺣﻮزهﻫﺎي آﺑﺨﯿﺰاﻫﻤﯿﺖ زﯾﺎدي دارد ﻋﻠﯽرﻏﻢ اﻫﻤﯿﺖ زﯾﺎد، در اﯾﺮان ﻣﻄﺎﻟﻌﺎت زﯾﺎدي در اﯾﻦ ﺧﺼﻮص ﺻﻮرت ﻧﮕﺮﻓﺘﻪ اﺳﺖ و ﻣﻄﺎﻟﻌﺎت اﻧﺠﺎم ﺷﺪه ﺑﯿﺸﺘﺮ ﺟﻨﺒﮥ ﮐﯿﻔﯽ دارﻧﺪ.ﻟﺬا در اﯾﻦ ﺑﺮرﺳﯽ ﻣﻘﺎوﻣﺖ ﺗﻮده ﺳﻨﮓ ﺳﺎزﻧﺪﻫﺎي ﮔﺮوه ﻓﺎرس ﺷﺎﻣﻞ آﻫﮏ ﻣﺎرﻧﯽ ﻣﯿﺸﺎن، ﻣﺎﺳﻪﺳﻨﮓ آﻫﮑﯽ آﻏﺎﺟﺎري، اﻧﯿﺪرﯾﺖ ﮔﭽﺴﺎران و ﺗﻮده ﺳﻨﮓ آﻫﮏ آﺳﻤﺎري )در ﺳﻪ ﻣﻨﻄﻘﮥﺑﻬﺒﻬﺎن، ﮔﭽﺴﺎران، دﯾﻠﻢ( ﺑﺎ ﮐﻤﮏ روش رﺗﺒﻪﺑﻨﺪي ﻣﻘﺎوﻣﺖ ﺗﻮده ﺳﻨﮓ RMR)( ﻣﻮرد ﻣﻘﺎﯾﺴﻪ ﻗﺮار ﮔﺮﻓﺖ. اﯾﻦ ﻣﻄﺎﻟﻌﻪ در ﻣﻨﺎﻃﻖ ﺑﻬﺒﻬﺎن، ﮔﭽﺴﺎران، دﯾﻠﻢ و دﻫﺪﺷﺖ اﻧﺠﺎم ﺷﺪ. ﻣﻘﺎﯾ ﺴﮥ ﻣﯿﺎﻧﮕﯿﻦ ﻣﻘﺎوﻣﺖ 81 ﻧﻤﻮﻧﮥ ﻣﻮرد ﻣﻄﺎﻟﻌﻪ در ﭼﻬﺎر ﻧﻮع ﺳﻨﮓ ﻧ ﺸﺎن داد ﮐﻪ در ﺳﻄﺢ ﻣﻌﻨﯽداري 0/05 و ﺑﺎ ﺗﺤﻠﯿﻞ ANOVA و ﺗﺤﻠﯿﻞ ﭘﯿﮕﯿﺮي ﺗﻮﮐﯽ ﺑﯿﻦ ﻣﻘﺎوﻣﺖ ﺳـــﻨﮓﻫﺎي ﻣﻮرد ﻣﻄﺎﻟﻌﻪ ﺗﻔﺎوت ﻣﻌﻨﯽدار وﺟﻮد دارد و ﺑﻪ ﺗﺮﺗﯿﺐ ﺑﯿﺸـــﺘﺮﯾﻦ ﻣﯿﺎﻧﮕﯿﻦ اﻣﺘﯿﺎز RMR ﻣﺮﺑﻮط ﺑﻪ ﺳﻨﮓﻫﺎي آﻫﮏ آ ﺳﻤﺎري، آﻫﮏ ﻣﯿ ﺸﺎن، ﻣﺎ ﺳﻪ ﺳﻨﮓ آﻫﮑﯽ آﻏﺎﺟﺎري و اﻧﯿﺪرﯾﺖ ﮔﭽ ﺴﺎران ا ﺳﺖ. اﯾﻦ ﻣﻄﺎﻟﻌﻪ ﻫﻤﭽﻨﯿﻦ ﻧﺸــﺎن داد ﮐﻪ ﺑﯿﻦ ﻣﻘﺎوﻣﺖ ﺳــﻨﮓﻫﺎي ﺳــﺎزﻧﺪ ﻓﺎرس ﺑﺎ روشRMR ﺗﻔﺎوت ﻣﻌﻨﯽدار وﺟﻮد ﻧﺪارد وﻟﯽ ﺑﯿﻦ ﺳــﻨﮓﻫﺎي ﺳــﺎزﻧﺪ ﻓﺎرس و ﺳﻨﮓ آﻫﮏ آ ﺳﻤﺎري ﺗﻔﺎوت ﻣﻌﻨﯽدار وﺟﻮد دارد. ﺳﻨﮓ آﻫﮏ آ ﺳﻤﺎري از ﻧﻈﺮ ﻣﻘﺎوﻣﺘﯽ ﺟﺰء ﺳﻨﮓﻫﺎي ﺧﻮب ﺗﺎ ﺧﯿﻠﯽ ﺧﻮب ﺑﺎ ﻣﺤﺪودة اﻣﺘﯿﺎز روش 69RMR ﺗﺎ 84، ﺳﻨﮓ آﻫﮏ ﻣﯿﺸﺎن ﺑﯿﻦ ﻣﺘﻮﺳﻂ ﺗﺎ ﺧﯿﻠﯽ ﺧﻮب53 ﺗﺎ 83، ﻣﺎﺳﻪﺳﻨﮓ آﻫﮑﯽ آﻏﺎﺟﺎري ﻣﺘﻮﺳﻂ ﺗﺎ ﺧﻮب44 ﺗﺎ 76، و اﻧﯿﺪرﯾﺖ ﮔﭽﺴﺎران ﺧﻮب63 ﺗﺎ74 ﻣﯽﺑﺎﺷﺪ.

Data on the resistance of rocks to erosion and weathering and their voluntary ratings are key information in erosion and sediment studies. Despite the importance, rock resistance to weathering is not well studied in Iran and the conducted studies are more qualitative rather than quantitative. In this study rock mass resistances of Asmari formation (limestone) and Fars formations including Mishian (marl limestone), Aghajari (Calcareous sandstone) and Gachsaran (anhydrite) were assessed using rock mass rating (RMR) method in Behbahan, Gachsaran, Deylam and Dehdasht regions. ANOVA and Tukey,s analysis of resistances of 81 collected rock samples showed there were significant differences (P<0.05) between geological formations in term of rock resistance. According to RMR rating, rock mass resistances were in order of Asmari limestone> Mishan limestone> Aghajari calcareous sandstone> Gachsaran anhydrite. Results also indicated there were no significant differences between rock resistances of Fars formations but rock resistance of Fars formations differed significantly from Asmari formation.