Zhang Qiangyong's invention patent

1. Iron crystal sand cemented similar materials and their preparation methods: Zhang Qiangyong, Li Shucai, Zhu Weishen, etc. , authorized on September 2, 2007/kloc-0.

2. Combined geomechanical model test bed devices: Zhang Qiangyong, Li Shucai, Zhu Weishen, etc. , authorized time: 2009.1May 3.

3. Three-dimensional geomechanical model test system: Li Shucai, Zhang Qiangyong, Zhu Weishen, etc. Authorization time: 2008.11.12.

4. The true three-dimensional loading model test system of high ground stress: Zhang Qiangyong, Li Shucai, Chen Xuguang, etc. , authorization time: 20 10.5.20.