div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imagea href=https:reader039fdocumentsusreader039viewer20220401165f0252997e708231d403b329html5page1jpg target=_blank img data-url=document-973sfr-international-journal-of-mining-science-sklcumteducnuploadarticlefiles336fd740d72847fhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: * 973SÃR International Journal of Mining Science …sklcumteducn_uploadarticlefiles336fd740d72847fInternational Journal of Mining Science and Technology KEY DATES : Full loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader039fdocumentsusreader039viewer20220401165f0252997e708231d403b329html5thumbnails1jpg width=140 height=200 adivdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imagea href=https:reader039fdocumentsusreader039viewer20220401165f0252997e708231d403b329html5page2jpg target=_blank img data-url=document-973sfr-international-journal-of-mining-science-sklcumteducnuploadarticlefiles336fd740d72847fhtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: * 973SÃR International Journal of Mining Science …sklcumteducn_uploadarticlefiles336fd740d72847fInternational Journal of Mining Science and Technology KEY DATES : Full loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader039fdocumentsusreader039viewer20220401165f0252997e708231d403b329html5thumbnails2jpg width=140 height=200 adivdiv