Lub hnab ntim khoom muaj ntau yam. Peb yuav teev cov chaw uas nws siv. Peb vam tias peb muaj kev nkag siab zoo ntawm cov thawv ntim khoom. Lub hnab ntim tau yooj yim tau siv dav, tshwj xeeb tshaj yog rau ntim cov cement ntau thiab khoom noj. Cov khoom siv tshuaj lom neeg, pub, hmoov txhuv nplej siab, cov zaub mov (xws li hmoov), cov khoom zoo, thiab txawm tias cov khoom txaus ntshai (xws li calcium carbide), thauj khoom, tshem tawm, kev thauj mus los, kev khaws cia yog yooj yim heev. Tam sim no, cov khoom ntawm lub nra yog nyob rau hauv txoj kev loj hlob theem, tshwj xeeb tshaj yog ib tug loj tus naj npawb ntawm cov khoom, lub hnab nyob rau hauv daim ntawv ntawm pallets, yog ua ntau thiab nrov.
Raws li kev ntim khoom, lub thawv ntim khoom yuav tsum xyuas kom muaj kev thauj khoom thiab thauj khoom ntawm cov khoom xa tawm thaum thauj khoom, tshem tawm, thauj thiab khaws cia, thiab kev nyab xeeb ntawm cov khoom thauj mus rau lawv qhov chaw. Lub hnab ntim khoom yog ib hom kev thauj mus los yooj yim ntim ntim, dav siv hauv cov khoom noj, nplej, tshuaj, tshuaj, zaub mov thiab lwm yam hmoov, granular thiab blocky khoom thauj thiab ntim, booming siv lub thawv ntim khoom thauj. Khaws cov khoom ntim khoom. Nyob rau hauv ob peb xyoos tom ntej no, nrog rau kev txhim kho ntawm ib puag ncig kev paub, kev siv cov thawv ntim khoom hauv kev lag luam hauv tsev thiab txawv teb chaws yuav ntau thiab ntau dua, thiab kev cia siab rau kev lag luam yuav zoo heev, uas muab lub sijhawm rau kev tsim cov thawv ntim khoom.
Daim ntawv thov teb ntawm lub hnab ntim khoom yog qhov dav heev, thiab kuv vam tias nrog kev txhim kho txuas ntxiv ntawm lub zog thiab zoo, lub thawv ntim yuav coj peb cov txiaj ntsig kev lag luam ntau dua.