Xiaomin YU

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Xuzhou, CN

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Patents Grantslast 30 patents

Information Patent Grant
Water-preserved-mining roof-contacted filling method for controllin...
- Patent number 9,689,258
- Issue date Jun 27, 2017
- China University of Mining and Technology
- Liqiang Ma
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
WATER-PRESERVED-MINING ROOF-CONTACTED FILLING METHOD FOR CONTROLLIN...
- Publication number 20160348507
- Publication date Dec 1, 2016
- CHINA UNIVERSITY OF MINING AND TECHNOLOGY
- Liqiang Ma
- E21 - EARTH DRILLING MINING
Information Patent Application
SKIP-MINING TYPE WANGEVIRY STOPE BRANCH ROADWAY FILLING AND COAL MI...
- Publication number 20160305245
- Publication date Oct 20, 2016
- CHINA UNIVERSITY OF MINING AND TECHNOLOGY
- Liqiang MA
- E21 - EARTH DRILLING MINING