Application of drainage hole location and rapid construction technology in prevention and control of separated layer water
The mining of extra-thick coal seam in Yonglong mining area of Jurassic coalfield in Huanglong is threatened by water gush-ing(bursting),it is urgent to strengthen the research and application of the key techniques for the prevention and control of separated layer water damage.At present,most of the mining areas adopt the surface pumping and drainage technology,but there is no systematic analysis and study on the reasonable layout of the pumping and draining holes and the rapid drilling,taking the prevention and control experience of the separated layer water in No.1310 working face of Guojiahe coal mine,by means of engineering test,field operation and theoretical analysis,the engineering test data before and after mining,electrical method results,influence radius of pumping and drain-age,drilling technology and hole formation efficiency were analyzed and studied,the results are as follows:the location of pumping and draining holes should be arranged according to"the influence radius of pumping holes should be taken into account in abnormal sec-tion",and the spacing should be 230-285.4 m.After 155-175 m drilling,the drilling efficiency is increased by 3-5 times by impro-ving the well diameter,casing material,drilling method and well completion technology.
separated layer gushing(bursting)waterpumping and draining holehole location arrangementdrilling and well comple-tion technology
万方数据
维普
