CAJ | 학술논문

充填开采是解决煤矿开采沉陷及地表破坏的有效方法。此项技术是利用粉煤灰和煤矸石配制充填材料再通过管道泵送充填到采空区，不仅解决了充填物源的问题，同时也实现了粉煤灰、煤矸石等固废的源头治理，具有重要的研究价值。管道输送是其中一个重要的环节，管道阻力特性作为浆体管道工程设计的核心内容之一具有重要的研究意义。管道阻力特性与压力损失和流量密切相关，它们也是设计输送系统的重要参数，直接关系到动力设备的选型和运行的能耗。针对料浆在管道输送过程中流动规律尚不明确的现状，本文进行了管道输送试验，重点对体积分数为80%，81%的典型充填料浆的管道输送特性进行了研究。试验表明，管道泵送过程中，压力损失随时间呈周期性变化，其周期随泵送频率的增大而缩短；压力损失随体积分数和频率的增加而增大；压力损失与浆体的流速呈直线增长的线性关系，流速越大，压力损失越大；流量与流速也呈线性关系，流量随流速的增大而增大。
충전개채시해결매광개채침함급지표파배적유효방법。차항기술시이용분매회화매안석배제충전재료재통과관도빙송충전도채공구，불부해결료충전물원적문제，동시야실현료분매회、매안석등고폐적원두치리，구유중요적연구개치。관도수송시기중일개중요적배절，관도조력특성작위장체관도공정설계적핵심내용지일구유중요적연구의의。관도조력특성여압력손실화류량밀절상관，타문야시설계수송계통적중요삼수，직접관계도동력설비적선형화운행적능모。침대료장재관도수송과정중류동규률상불명학적현상，본문진행료관도수송시험，중점대체적분수위80%，81%적전형충전료장적관도수송특성진행료연구。시험표명，관도빙송과정중，압력손실수시간정주기성변화，기주기수빙송빈솔적증대이축단；압력손실수체적분수화빈솔적증가이증대；압력손실여장체적류속정직선증장적선성관계，류속월대，압력손실월대；류량여류속야정선성관계，류량수류속적증대이증대。
Goaf filling is the current efficient solution to solve mining subsidence and surface damage during coal mining. The filling material which is prepared with fly ash and coal gangue is pumped into the goaf through the pipe, which not only can provide the material source for filling, but also control the environmental pollution caused by coal gangue and fly ash disordered stacking from headstream. The pipeline transportation is one of the important links. As one of the key points in the design of a pipeline transport, the flow resistance of pipeline is related closely with the pressure loss and flow. There are important parameters in transportation system design, and directly affect the selection of power equipment and the cost of operation. In view of the uncertain status of flow law for the pipeline transportation of high concentration cemented filling slurry, a pipeline transportation test was con-ducted, and the pipeline transportation features with the filling slurry concentrations of 80%and 81%was studied. The results show that the pressure loss shows cyclic change with the change of time during the pipe pumping process, and the pressure loss increases as the concentration, velocity and frequency increase, Meanwhile, the pressure loss shows a linear growth correlation with the velocity of slur-ry.Morewove, the flow rate also shows a linear correlation with the slurry velocity, which increases with the velocity increases.