CAJ | 학술논문

针对东滩煤矿4312综放工作面所采煤层可注水孔隙率较低，导水性较差的情况，在煤层脉动注水机理分析的基础上，开展高压脉冲式煤层注水，根据工作面超前支承压力及极限平衡区宽度确定注水超前距离及终止注水超前距离，并设计了脉冲式高压注水系统。现场试验表明，4312综放工作面煤层水分平均增加量达到1．197％，有效湿润半径达到15 m ，工作面各工序的平均降尘效率超过40％，注水效果明显优于同矿区同煤层静压注水和动压注水效果。
침대동탄매광4312종방공작면소채매층가주수공극솔교저，도수성교차적정황，재매층맥동주수궤리분석적기출상，개전고압맥충식매층주수，근거공작면초전지승압력급겁한평형구관도학정주수초전거리급종지주수초전거리，병설계료맥충식고압주수계통。현장시험표명，4312종방공작면매층수분평균증가량체도1．197％，유효습윤반경체도15 m ，공작면각공서적평균강진효솔초과40％，주수효과명현우우동광구동매층정압주수화동압주수효과。
According to low porosity and poor conductivity of coal seam in 4312 fully mechanized caving face ,high pressure pulse water infusion was carried out in Dongtan Coal Mine .Advance distance of water injection and termination of advanced water injection distance were determined according to mine pressure and the high pressure pulse water infusion system was designed .Field test showed that coal moisture was increased by 1 .197% on average ,effective wetting radius reaching up to 15 m and the average dust efficiency of every process in mechanized caving face exceeding 40% ,and so the effect of water injection was better than static pressure and dynamic pressure water injection in the same coal seam in the same mining area .