Method for recovering room-type coal pillars by cemented filling of reserved roadways

Release time:2023-09-01 Hits:

Affilication of Author(s):矿业工程学院

Scope of patent:国外

Disigner of the Invention:limeng,yanhao,zhangjixiong,刘恒凤

Type of Patent:国内

State of Patent:专利授权

Application Number:2018431390

Service Invention or Not:no

Application Date:2018-09-20

Authorization Date:2021-08-26

First Author:Zhou Nan