Khoom tawg: Ntuj tiv thaiv lub zog ntawm Lunar Basalt
Tus nqi tseem ceeb ntawm qhov kev tshawb nrhiav gravel no yog nyob rau hauv nws qhov tshwj xeeb muaj pes tsawg leeg thiab cov qauv. NASA lunar piv txwv qhia tau hais tias basalt pebbles (20-40mm inch) los ntawm lub lunar Oceanus Procellarum cheeb tsam yog nplua nuj nyob rau hauv ilmenite (FeTiO₃), nrog cov ntsiab lus siab li 25%-30%. Qhov no hlau-titanium oxide tsis tsuas yog endowspebbleswith excellent structural strength (compressive strength ＞200MPa, far exceeding Earth basalt) but also its dense crystal lattice scatters high-energy particles through nuclear reactions, acting as a natural "radiation shield."
Qhov tseem ceeb tshaj, nws ib txwm khaws cov hydrogen: cov kev ntsuam xyuas pom cov ntsiab lus hydrogen hauv cov pebbles ncav cuag ntau dua 8000ppm (feem ntau hauv hydroxyl daim ntawv hauv cov pob zeb hauv av). Hydrogen nuclei (protons) muaj qhov sib cuam tshuam loj heev - ntu nrog siab - lub zog cosmic rays (xws li galactic cosmic rays, GCR), zoo absorbing thiab decelerating nqi particles (xws li, protons, alpha hais). Nws qhov kev tiv thaiv kev ua haujlwm yog ob zaug ntawm txhuas (los ntawm qhov sib npaug), hais txog qhov tsis txaus ntawm cov khoom siv hlau ib leeg (xws li txhuas) hauv kev tiv thaiv siab - cov khoom siv hluav taws xob.
Muab piv rau lub ntiaj teb- cov ntaub ntawv thauj mus los, lub hnub qub pebbles muaj qhov zoo: thauj 1 tuj ntawm txhuas mus rau lub hli yuav tsum tau kwv yees li 50 tons ntawm roj, thaum nyob rau hauv -situ mined basalt pebbles tsuas yog xav tau yooj yim tshuaj ntsuam thiab ua, txo cov nqi los ntawm 90% thiab zam kev siv hluav taws xob loj los ntawm lub ntiaj teb- Lub hli thauj.
Kev Tiv Thaiv Kev Ua Haujlwm: Los ntawm Radiation Shielding mus rau Dust Control
Cov ntaub ntawv xeem tau lees paub tias qhov sib sib zog nqus- qhov chaw tshawb nrhiav gravel ua haujlwm zoo dua cov khoom siv hauv kev tiv thaiv. Hauv kev ntsuas hluav taws xob simulating ib puag ncig lub hli, 30cm-tuab thaiv ua los ntawm cov pebbles ua tiav 65% kev tiv thaiv kev ua haujlwm tiv thaiv 1-10GeV protons, 40% kev txhim kho tshaj qhov sib npaug txhuas daim thaiv (25%). Rau cov ions hnyav (piv txwv li, hlau ions), tus nqi tiv thaiv yog qhov tseem ceeb ntawm 58% (vs . 12% rau txhuas), muaj peev xwm tswj tau cov astronauts 'ib xyoos ib zaug hluav taws xob nyob rau hauv 500mSv kev nyab xeeb pib (kwv yees li 1/3 ntawm qhov ntawd ntawm International Space Station).
Meanwhile, nws cov hauj lwm zoo hauv suppressing lunar plua plav yog qhov tseem ceeb sib npaug. Lunar regolith (particles ＜20μm) tau yooj yim sawv los ntawm cov teebmeem electrostatic, abrading cov cuab yeej thiab ua rau cov neeg nyob hauv lub ntsws puas. Lub ntuj graded qauv ntawm basalt pebbles (20- 40mm particles forming nruam pores) kho cov plua plav saum npoo los ntawm lub ntiajteb txawj nqus thiab kev sib txhuam, txo cov plua plav nce los ntawm 80% nyob rau hauv cov cheeb tsam-dav superior rau hlau daim hlau (tsuas yog 30% txo). Qhov kev ua haujlwm thib ob ntawm "kev tiv thaiv + kev tiv thaiv plua plav" ua rau txo qis tus nqi kho rau lunar bases.
Ntev-kev ntsuas kev ruaj ntseg ntxiv ua kom nws muaj nuj nqis: tom qab 1000 teev ntawm simulated hnub ci cua raug (siab-zog particle flux), lub ilmenite qauv ntawm pebbles qhia tsis muaj qhov tseem ceeb decomposition, nrog hydrogen poob ＜5%; Tom qab 300 thermal voj voog (-173℃rau 127 degree), fragmentation tus nqi yog ＜1%, ua tau raws li qhov yuav tsum tau muaj rau huab cua huab cua puag ncig.
Daim Ntawv Thov Engineering: Core Infrastructure Material rau Artemis Program
Raws li cov thev naus laus zis tseem ceeb hauv NASA's Artemis qhov kev pab cuam, sib sib zog nqus- qhov chaw tshawb nrhiav gravel tau muab tso rau hauv cov phiaj xwm kev tsim kho rau lub hnub ci mus tas li (tshwj xeeb rau kev xa tawm hauv 2026). Raws li kev npaj, lub lunar module puag yuav txais yuav "gravel-resin" cov qauv sib xyaw: siv cov tshuaj ntsuam xyuas basalt pebbles ua aggregate, tov nrog rau hauv -situ lunar molten iav li binder, nchuav rau hauv 50cm- txheej tiv thaiv tuab uas ua haujlwm ob qho tib si raws li lub hauv paus thiab hluav taws xob tiv thaiv.
Tus nqi suav qhia tau hais tias kev khawb thiab ua cov pob zeb no raug nqi kwv yees li $ 1,200 / ton (xws li kev tshuaj xyuas thiab sib nqus sib nqus rau ilmenite purification), qis dua lub ntiaj teb - thauj txhuas ($ 10,000 / ton). Rau thawj zaug 1000㎡ tiv thaiv qhov project ntawm lunar puag ib leeg, nws tuaj yeem txuag tau tshaj $ 8 lab.
Ntau qhov tob, nws hloov pauv qhov sib sib zog nqus- qhov chaw tshawb nrhiav qhov sib txawv: los ntawm "hauv-situ resource utilization (ISRU)," lunar pebbles tsis tsuas yog daws teeb meem kev tiv thaiv xwb tab sis kuj lees paub qhov ua tau ntawm "extraterrestrial infrastructure txhawb los ntawm extraterrestrial kev pab," muab ib tug replicaable technical path rau yav tom ntej Mars puag. Raws li NASA tus thawj kws tshawb fawb tau sau tseg: "Cov pob zeb no los ntawm lub hli yuav yog tib neeg lub pob zeb thawj zaug mus rau qhov chaw tob."