双通道连续抽采放水排渣装置设计及其效果评价  

Design and effect evaluation of dual-channel continuous extraction and slag discharge device

作　　者：赵晶 ZHAO Jing(Mine Safety Branch,China Coal Research Institute Company Limited,Beijing 100013,China;State Key Laboratory of Coal Mining and Clean Utilization,Beijing 100013,China)

机构地区：[1]煤炭科学技术研究院有限公司安全分院,北京100013 [2]煤炭资源高效开采与洁净利用国家重点实验室,北京100013

出　　处：《煤炭工程》2022年第6期177-182,共6页Coal Engineering

基　　金：国家自然科学基金面上项目(52074120);国家重点实验室开放基金资助项目(GJNJ-18-73.17)。

摘　　要：针对高突矿井瓦斯抽采钻孔、管路积水制约抽采效率问题,研发了双通道连续抽采放水排渣装置,创新性设计了固液分离滤板和气液分离筛网,箱体上、下端分别增设有双通道旁通管及双排泄口可实现放水-排渣过程瓦斯连续抽采、大流量排水。基于放水-排渣效果、操作性能及经济成本等指标构建了多因素评价方法,对常见3种放水器与了双通道连续抽采放水排渣装置进行综合评价及优选,得出该装置具备排水能力强、多相混合流分离效果佳、实操便捷、适用范围广、制造及维护成本低廉等显著特点。并在宏岩煤矿10102工作面进行现场应用,提出非连续抽采影响因子并作为放水方式影响抽采修改评判指标,结果表明:抽采瓦斯量、浓度与非连续抽采影响因子及次数呈负相关性,采用该装置20d内抽采瓦斯浓度下降量仅为传统手动放水器的61%,衰减慢、降幅小,放水效果较好,有效提升管路瓦斯抽采效率。Aiming at the water accumulation in gas extraction boreholes and pipelines, restricting the extraction efficiency in high gas and outburst coal mine, a dual-channel continuous extraction and slag discharge device is developed, and a solid-liquid separation filter plate and a gas-liquid separation screen are designed. The upper and lower ends are respectively equipped with double-channel bypass pipes and double drains, which can realize continuous gas extraction and large-flow extraction in the process of water discharge and slag discharge. A multi-factor evaluation method was constructed based on indicators such as water discharge-slagging effect, operational performance and economic cost, and a comprehensive evaluation and optimization of three common water dischargers and this device were carried out, the proposed device is of large water discharge capacity, great multiphase flow separation effect, convenient operation, wide application range, low manufacturing and maintenance costs. The device is applied in the 10102 working face of Hongyan Coal Mine, and the influence factor of discontinuous extraction is proposed as the evaluation index of water extraction method affecting extraction. The results show that, the gas extraction volume and concentration is negatively correlated with the impact factor and frequency of discontinuous extraction. The reduction of gas extraction gas concentration within 20 days using this device is only 61% of that using traditional manual water discharge device, with the slower attenuation and less reduction, and favorable water discharge effect, the pipeline gas extraction efficiency is obviously improved.

关 键 词：瓦斯抽采 放水器 连续抽采 固液分离 非连续抽采影响因子 

分 类 号：TD712[矿业工程—矿井通风与安全]