Hauv kev lag luam mining, yuav ib txwm muaj cov khoom siv granular, lumpy thiab powdery, uas yuav dhau mus thiab ua paug ib puag ncig thaum thauj khoom ncaj qha thaum thauj. Yog li ntawd, cov khoom yuav tau ntim rau hauvton hnabthaum lub sij hawm kev thauj mus los, thiab tom qab ntawd thauj, uas tsis tsuas yog pab txhawb kev thauj mus los, tab sis kuj daws qhov teeb meem ntawm kev ua qias tuaj ib puag ncig, ua rau kev thauj mus los yooj yim dua. Ntim ore nrog tons ntawm lub hnab tsis tsuas yog yooj yim rau kev thauj mus los, tab sis kuj tseem tiv thaiv cov ore zoo heev. Yog li dab tsi yuav tsum tau them sai sai rau thaum ntim ore hauv lub hnab ntim khoom?
Thaum xaiv cov khoom sib xyaw, koj yuav tsum xub xaiv cov khoom uas muaj qhov zoo sib xws. Yog tias qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv loj heev, cov qib ntawm plasticization tsis zoo ib yam, uas yuav cuam tshuam rau cov nyhuv stretching, txo qhov zoo ntawm cov hlau tiaj tus, tsim cov xov hlau tawg, thiab ua rau muaj kev tsis lees paub ntau ntxiv. Nyob rau hauv cov xwm txheej hnyav, kev tsim khoom ib txwm raug cuam tshuam. Nyob rau tib lub sijhawm, lub sijhawm ziab thiab qhov kub thiab txias ntawm cov khoom yuav cuam tshuam rau kev sib xyaw ntawm cov khoom sib xyaw.
