Thaum kho lub zog txuag ntawm cov kiv cua mining, feem ntau hais lus, txhawm rau ua tiav cov txiaj ntsig zoo, peb yuav tsum nkag siab nws cov kauj ruam, nrawm thiab lwm yam teeb meem kom meej, thiab ua tiav lub hom phiaj thiab cov txiaj ntsig peb xav tau los ntawm qee yam kev ua haujlwm. Yog li no, niaj hnub no peb piav qhia txog cov kauj ruam tshwj xeeb uas peb yuav tsum tau them sai sai rau thaum txuag hluav taws xob.
(1) Kev hloov ceev ntawm cov kiv cua mining yuav tsum tsis txhob loj heev, feem ntau ntawm 70 feem pua thiab 100 feem pua, thiab qhov tsawg kawg nkaus ceev yuav tsum tsis pub tsawg tshaj 50 feem pua ntawm cov ntsuas ceev. Vim tias thaum qhov ceev qis dua 40 feem pua - 50 feem pua, qhov ua tau zoo ntawm nws tus kheej txo qis, uas yog qhov tsis zoo.
(2) Thaum txiav txim siab qhov kev tswj hwm ceev, ua tib zoo saib xyuas lub tshuab tseem ceeb ntawm lub tshuab, txwv tsis pub lub tsev yuav raug puas tsuaj thaum qhov ceev mus txog qhov zaus resonant.
(3) Cov yam ntxwv ntawm cov khoom siv ceev uas tau xaiv yuav tsum ua raws li cov yam ntxwv ntawm cov kiv cua mining kom deb li deb tau, txwv tsis pub cov nyhuv tsis zoo tagnrho.
Mining kiv cua muaj qee yam kev txuag hluav taws xob, uas peb txhua tus paub, yog li peb yuav tsum tau them nyiaj tshwj xeeb rau kev ua haujlwm kom raug. Thaum muaj qhov yuam kev hauv nws txoj kev ua haujlwm, nws yooj yim ua rau muaj qhov cuam tshuam tsis zoo, yog li peb yuav tsum ua haujlwm raws li cov kauj ruam kom raug.
