COAL ENGINEERING ›› 2016, Vol. 48 ›› Issue (11): 42-45.doi: 10.11799/ce201611013

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Study on the feasibility of the dewatering and depressurizing of the high pressure roof water

  

  • Received:2015-11-03 Revised:2015-12-08 Online:2016-11-10 Published:2016-12-16

Abstract: In order to eliminate the threat of the high pressure water in the sandstone on the seam roof, the feasibility of the dewatering and depressurizing was studied by carrying out a large dewatering test underground before mining work and observing the water drawdown under different water discharge. The results showed that the total water discharge decreased from 223.2 m3/h(Y36-3)to 20-30 m3/h and the water pressure from 5MPa to 0.38MPa after a period of time of dewatering. The decline is obvious, so the conclusion was dawn that the way of the dewatering and depressurizing was feasible. The standard for mining work was put forward, which would play a foundational role for the later work.

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