"Four Control and One Inspection"roof drilling drainage technology in Jurassic mining area of Or dos
The Jurassic coal mines in Ordos Basin are generally threatened by the water damage of roof sandstone,and the a-mount of water drainage engineering is generally large.At present,there is no certain layout mode and specification to be ref-erenced.Based on the analysis of the variation of water volume in different stages of working face,combined with the charac-teristics of water disaster of roof sandstone in the region,the recharge with different attributes is analyzed,and the static wa-ter reserve of roof sandstone is the pre-drainage object,and the dynamic recharge is the normal.Four kinds of continuous control means and one inspection measure are used to optimize the dynamic drilling of water drainage.The results show that on the basis of ensuring the safety of mining face,the optimized method of"four control and one inspection"is adopted to make the layout of drainage boreholes more reasonable,which can effectively reduce the amount of water drainage and a-chieve cost reduction,safety and efficiency increase.It provides a certain reference for the safe and efficient production in mines with roof sandstone water hazard.
Jurassic coalfieldmine water hazardsandstone water"four control and one inspection"water drainage
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