一种超高水材料充填工作面矸石泵送留巷无煤柱开采方法

Release time:2020-10-30 Hits:

School Sign:第一单位

Disigner of the Invention:班建光,范立民,耿继业

Type of Patent:国内

State of Patent:专利授权

Application Number:201910687412.X

Number of Inventors:4

Service Invention or Not:no

Application Date:2019-07-25

Authorization Date:2020-05-26

First Author:wangfangtian