
Coal Picks, wanda kuma aka sani da zaɓen masu hakar ma'adinai, zaɓen conical, ko zaɓen dutse, mahimman kayan aikin yankan da ake amfani da su a cikin masana'antar hakar ma'adinai da tunnelling. An tsara su musamman don karyewa da tono kayan kamar gawayi, dutse mai laushi, da sauran ma'adanai ta hanyar ɗora su akan ganguna masu juyawa na masu hakar ma'adinai masu ci gaba, masu kai hanya, da masu shears.
Babban aikin su shine yin aiki azaman wurin kai hari, canja wurin ikon injin zuwa tasiri mai ƙarfi da ƙarfi don karya kayan.
Tungsten Carbide Tukwici: Tushen yankan an yi shi da tungsten carbide, wanda aka sani don taurinsa mafi girma da juriya. Wannan yana da mahimmanci don yanke ta kayan abrasive. Tip ɗin yana kan jikin karfe.
Jikin Karfe/Shank: Jikin yana da inganci mai inganci, ƙarfe mai ƙarfi mai ƙarfi wanda zai iya jure babban tasirin tasiri da ƙarfin lanƙwasa ba tare da karye ba. An ƙera mashin ɗin mashin daidaici don dacewa da aminci cikin toshe ko mariƙin a kan drum ɗin injin.
Siffar Conical/Chisel: Kwal zaɓen yawanci suna da kai mai siffa (conical) ko kai mai siffa. Wannan zane yana ba su damar shiga da kuma karya kayan da kyau, ƙirƙirar kwakwalwan kwamfuta maimakon kawai niƙa shi zuwa ƙura.
Tsarin Rikewa: Ana riƙe su ta hanyar tsarin riƙewa na inji, yawanci maɓallin yumbu da shirin bazara ko makamancin kullewa. Wannan tsarin yana kiyaye zaɓin amintacce a cikin toshe yayin ba shi damar juyawa yayin aiki.
Hakazalika da hakoran ball na carbide, inganci da tsawon rai na yawancin kwal ɗin da ake zaɓe sun dogara da ikonsu na juyawa:
Yayin da ganga ke jujjuyawa, zabin ya bugi ya ratsa fuskar kwal ko dutsen.
Ƙungiyoyin asymmetric da ke aiki akan tip ɗin conical suna sa shi ya ɗan juya kadan a cikin mariƙinsa tare da kowane tasiri.
Wannan jujjuyawar yana tabbatar da cewa an rarraba lalacewa a ko'ina a kusa da tip carbide, yana hana samuwar wuri guda ɗaya. Wannan tasirin "kaifi-kai" yana kula da bayanin martaba mai kaifi kuma yana faɗaɗa rayuwar sabis ɗin zaɓi sosai.
Zaɓen kwal kayan aiki ne na asali a cikin ayyukan tono da ma'adinai daban-daban:
Haƙar ma'adinan kwal a ƙarƙashin ƙasa: Aikace-aikacen farko, wanda aka yi amfani da shi akan masu hakar ma'adinai masu ci gaba, masu sassaukar bangon bango, da masu kai hanya.
Ramin Rauni & Tuƙa: An yi amfani da shi a cikin rami mai laushi zuwa matsakaici-hard dutse da haɓakar ma'adinai.
Tsanani & Hana Sama: An yi aiki a kan ƙananan magudanar ruwa da masu tonawa don yanke ta cikin ƙaƙƙarfan ƙasa da dutse mai laushi.
Tebur mai zuwa yana taƙaita mahimman fasalulluka don dubawa mai sauri:
| Siffar | Bayani | Amfani |
| Siffar kai | Nuna (conical) ko siffa mai siffa. | Da kyau yana shiga kuma yana karya abu. |
| Kayan abu | Tungsten carbide tip ɗin da aka haɗe a jikin ƙarfe mai tauri. | Haɗa matsananciyar juriyar lalacewa tare da taurin tasiri. |
| Core Mechanism | Juyawa kyauta tsakanin mariƙin kulle (don yawancin nau'ikan). | Yana haɓaka ko da sawa, kaifi da kai, da tsawon rayuwar sabis. |
| Aiki na Farko | Karye da tono gawayi da taushi zuwa matsakaici-tsayin dutse. | Ingantacciyar inganci don saurin cire kayan abu a cikin hakar ma'adinai. |
| Mabuɗin Amfani | Ƙarfafa Ƙarfafa Ƙarfafawa & Rage Rage Lokaci. | Yana kula da yanke aikin, rage yawan sauyawa. |
| Aikace-aikace gama gari | Masu hakar ma'adinai masu ci gaba, masu shear, masu kan titi, injunan tunnel. | Daidaitaccen kayan aikin yankan kayan aikin ma'adinai na zamani. |
A takaice, Kwal Zaba Abubuwan da ake amfani da su masu mahimmanci ne a cikin masana'antar ma'adinai. Ƙirarsu mai ƙarfi, haɗa tukwici na tungsten carbide mai ƙarfi tare da jikin ƙarfe mai ƙarfi da injin juyawa, yana tabbatar da babban aiki da ingantaccen aiki a cikin ƙalubale na ƙasa da yanayin ƙasa.