Water inrush and sand inrush prevention and control technology for coal mining in seam with thick and loose aquifer

in order to fiectvely solve the water inrush and sand nrush ifficuties of the coal mining in the seam with a thin base rock and thick loose acquifr in Shendong wlining Area.based on No.22206 coal mining face in Htalagou Mline as a case.,the paper analyzed the waer disaster condition faced to the mining operation of he coal mining face.According to the grouting engineering operated at the surface ground with a high litboy the surace ground condtions,many constucion interfernces high engineering cost as well as the surtace ground ecologic envronment failre actual problems.the paper provided a control method conmbined withthe water dainage in the underground mine and the grouting reinforcement.Based on the cicumstancs a water inrush and sand inush prevention and control schial route wit" drainage and grouting combination frstly drainage and secondary grouting control and exploraton,frity control and secondary mining" was formed.The aplication rsults of Halagou Mine showed that afer the water drainage and grouting echnology implemenmed,there would araining and sand leakage phenomenon ocrred between the some powered supports. There was some sediment in the water inrush zone of the goaf nd the sediment would not beafiected to the normal mining operation of the cal mining face. There was no sand inrush phenomenon occurred in other secton areas and the technology had reached the best control efc.