# 9 for Chuang Kuo two coal mining with pressure water inrush risk assessment in the past use of water inrush coefficient method, bottom water blocking its ability to evaluate, the evaluation results more dangerous.

The Guo 2 Zhuang 9# coal mining with pressure plate and water hazard evaluation of past utilization coefficient water law and water blocking ability, motherboards, such as an evaluation of the risk is greater results.

Coal belt pressed the mining ledger wall flooding risk appraisal regarding Guo's two village 9# formerly using the flooding method of correlates, the ledger wall anti- hydro energy strength and so on carries on the appraisal to it, the appraisal result risk has been big.

Guo Erzhuang coal mining under safe water pressure of water inrush in 9# using coefficient method of water inrush risk assessment ever, its evaluation of floor water resistance ability, more dangerous nature evaluation results.

Guo Erzhuang coal mining under safe water pressure of water inrush in 9# using coefficient method of water inrush risk assessment ever, its evaluation of floor water resistance ability, more dangerous nature evaluation results.