Hauv kev ua haujlwm ntawm cov thee mine txoj kev txhawb nqa, lawv feem ntau ua peb hom kev ua haujlwm drilling:
Thauj tog rau nkoj kho qhov qhov: 28-32mm inch, 1.8-2.5m sib sib zog nqus, nrog ib tug verticality sib txawv ntawm tsawg tshaj li los yog sib npaug rau 3 degree
Gas ntws qhov: 42mm nyob rau hauv txoj kab uas hla, siv reinforced ob - tis thauj tog rau nkoj bolt laum khoom kom tiav 8-12 meter qhov tob
Geological tshawb nrhiav qhov: Siv nrog φ50 laum rods rau 10-15 meter pob zeb qauv sau
Hauv kev siv tunnel engineering, ob - tis qauv qhia tau zoo hauv kev hloov pauv ntawm qhov chaw:
Yam tsawg kawg nkaus kev khiav hauj lwm vojvoog ntawm 0.6m, haum rau txoj kev nqaim nrog tus ntoo khaub lig- seem Tsawg dua los yog sib npaug rau 8㎡
Ua tiav ib zaug - voj voog nkag ntawm 2.8-3.5m hauv Chav Kawm IV nyob ib puag ncig pob zeb
