Nyob rau hauv xyoo tas los no, semicontinuous mining thev naus laus zis tau siv dav hauv qhov qhib loj - qhov chaw thee mines. Nyob rau hauv no mining tshuab, mobile crusher yog cov khoom tseem ceeb. Txij li xyoo 1970s, ntau lub mines hauv Suav teb tau hloov pauv cov thev naus laus zis thev naus laus zis vim tsis muaj cov cuab yeej siv li no, uas tau nce tus nqi mining. Kev loj hlob ntawm lojntxhia crusher tsis tuaj yeem muab cov cuab yeej txhim khu kev qha thiab muaj txiaj ntsig zoo rau qhib- qhov chaw thee mine, ua tau raws li cov kev cai ntawm semi- thev naus laus zis thev naus laus zis, tab sis kuj tseem sau qhov sib txawv hauv kev tsim thiab tsim cov khoom siv mobile (semi-}mobile) crusher, kom cov qib ntawm Suav manufacturing crushing khoom yuav nce mus rau qib tshiab. Tus tshiab ob - cov hniav crusher yog lub teeb hauv qhov hnyav, me me, qhov siab qis, loj hauv qhov loj me thiab muaj qhov sib tsoo loj. Nws yog ib qho khoom siv zoo tshaj plaws rau semi- thev naus laus zis thev naus laus zis hauv ntau qhov qhib- qhov chaw thee mines. Txoj kev tshawb fawb ntawm cov pob zeb hauv av tshiab hauv peb lub teb chaws tsuas yog pib thiab peb nyob rau theem tsim qauv. Kev suav ntawm lub hwj chim yog qhov txuas tseem ceeb hauv kev tsim cov crusher, uas yog ncaj qha cuam tshuam rau kev ua tiav ntawm cov qauv tsim tom ntej. Kev tshawb fawb theoretical thiab kev sim tau ua los ntawm kev suav cov txheej txheem ntawm cov pob zeb hauv av tshiab hauv daim ntawv no, uas muab lub hauv paus theoretical rau kev tsim.
Daim ntawv qhia dav dav ntawm crushing zog noj yog npaj, dA=-0(1), qhov twg dA yog lub zog noj thaum lub particle loj txo dx; C, tsis tu ncua; x yog particle loj. Ua ke cov kab zauv saum toj no, ces 4=-c-c. Nyob rau hauv kab zauv (2), D yog qhov nruab nrab particle loj ntawm cov khoom ua ntej crushing; d yog qhov nruab nrab particle loj ntawm cov khoom tom qab crushing. a=2,a=L, thiab =0.5 tau hloov pauv rau hauv cov qauv saum toj no, thiab Rittinger, Kick-Kirpichev,.Bond formula tau lees paub los ntawm kev lag luam ntxhia tau txais. Raws li txoj cai, Rittinger mis tsuas yog txiav txim siab lub zog noj ntawm thaj chaw saum npoo nce thaum lub sij hawm crushing, Kick-Kirpichev mis tsuas yog txiav txim siab lub zog deformation ua ntej crushing, thiab Bod mis tsuas yog qhov nruab nrab geometric ntawm ob lub qauv dhau los. Qhov tseeb, qhov kev siv hluav taws xob tiag tiag yog qhov sib npaug ntawm thaj chaw saum npoo ntxiv rau lub zog deformation. Qhov pub mis loj yog qhov sib txawv, thiab qhov kev faib ua feem sib txawv. Nyob rau hauv ntxhib crushing, vim lub ntim loj ntawm cov ntaub ntawv, deformation zog noj nyiaj rau ib tug loj feem, thiab kuj hais lus, los ntawm ua ntej crushing mus rau tom qab crushing, vim qhov nce ntawm qhov chaw, lub zog yuav tsum tau nce sharply. Yog li ntawd, peb cov qauv saum toj no muaj ntau yam sib txawv hauv daim ntawv thov. Cov mis yog haum rau kev sib tsoo zoo, Kick-Kirpichev mis yog tsim rau ntxhib crushing, thiab daim ntawv cog lus nyob rau hauv nruab nrab.
Qhov tshiabmineral sizersua ib hom dav hlau tshiab, tsis muaj cov qauv qhia txog kev txais yuav. Piv txwv li, m yog Bond ua hauj lwm Performance index (kW·h / t) raws li universal formula uas Charles; d yog qhov loj me ntawm cov khoom siv uas suav nrog ntau dua 80% ntawm qhov tso tawm qhov loj me (m; D yog qhov loj me ntawm cov khoom siv uas suav nrog ntau dua 80% ntawm cov khoom noj me me (m); Kuv yog tus lej tsis tu ncua. qhib- qhov chaw coal mine yog raws li nram no: 8.72kW·h/t thee, 12.40kW·h/t sandstone; Coarse sandstone 17.52kW·h/t. 1250 Cov pob zeb tshiab tshiab: Ntau lawm Q=2100tWh, paug loj d=2 × 10μm, pub loj D =5 × 10 m. Rau peb cov ntaub ntawv sib txawv, lub zog N(N'=WH·Q) noj ntawm qhov sib txawv ntawm kuv tuaj yeem suav tau raws li cov qauv (3). Kev sib raug zoo ntawm N ' thiab kuv yog qhia hauv daim duab 1. Raws li pom tau los ntawm daim duab, thaum i< At 0.45, N will increase sharply, and the power required by the three materials is very different from that of > At 0.5, the power obtained will be smaller than the actual situation. mineral sizers are therefore advisable: 0.45< i< 0.5.