https://cge.researchcommons.org/journal/vol51/iss5/12/
"Technology of raising upper limit of mining by grouting reconstruction" by XING Maolin, ZHENG...
In order to set anti-collapse coal (rock) pillars in the thick loose water-bearing sand layer to raise the upper limit of mining, the grouting transformation...
upper limittechnologyraisingmininggrouting
https://siltanen-research.net/fi/maolin-juhlaristeily/
MAOLin juhlaristeily – Samuli Siltanen
maolinsamulisiltanen