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TECHNOLOGY OF INJECTION OF OVERLYING STRATA TO PREVENT MINING SUBSIDENCE

Guo Jianbin Jang Yan( Geoscience Department, Shandong Institute of Mining & Technology, Tai' an, Shandong, 271019)  
The technology of separating zone injection of overlying strata, which is a new method to prevent the mining subsidence, can be used to protect the environment of coal mining. An example shows that the technology is effective and economic.
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