基于压力测量的瓦斯抽采管路运行状态诊断方法研究  

Research on Diagnosis Method for Gas Drainage Pipeline Network Running State Based on Pressure Measurement

作　　者：雷柏伟[1] 吴兵[1] 李旭[1] 刘占宇[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100013

出　　处：《矿业安全与环保》2017年第1期32-35,52,共5页Mining Safety & Environmental Protection

摘　　要：为了对瓦斯抽采管路中的异常状态进行全面诊断分析,基于可压缩气体流动理论建立气体压降方程,提出使用管道压力平方下降曲线的斜率对瓦斯抽采管路的泄漏和堵塞状态进行评价。采用实验室模拟试验和现场试验,验证了所提出方法的有效性及可靠性,结果表明:对于同一瓦斯抽采管路,在正常运行状态下,管道压力平方变化曲线的斜率不变;当中间管段出现堵塞或者泄漏时,该管段压力平方变化曲线的斜率都会迅速减小,而在堵塞状态下,下游管段压力平方变化曲线的斜率会恢复到与上游的一致,在管段泄漏时,下游管段压力平方变化曲线的斜率会小于上游管段压力平方变化曲线的斜率。In order to carry out an overall diagnousis and analysis on the abnormal state in the gas drainage pipeline network, the gas pressure drop equation based on the compressible gas flow theory was established and the method by using the descending curve slope of the pipeline pressure square （PPS） for evaluating the leakage and blockage status of the gas drainage pipeline network was proposed. The effectiveness and reliability of the proposed method were verified through the laboratory simulation test and field test. The results showed that the descending curve slope of the pipeline pressure square was invariant for the same gas drainage pipeline network under the normal running state; when the leakage or blockage happened in the middle pipe section, the descending slope of the pressure square of this pipe section would quickly decreased, and under the blockage state, the descending curve slope of the pressure square of the downstream pipe section would return to the consistent with that of the upstream pipe section, when the leakage happened in the pipeline, the descending curve slope of the pressure square of the downstream pipe section would less than that of the upstream pipe section.

关 键 词：瓦斯抽采 管路堵塞 管路泄漏 压力梯度 状态诊断 

分 类 号：TD712[矿业工程—矿井通风与安全]