摘要
为预测煤矿瓦斯治理中钻孔有效抽采半径,以贵州省四季春煤矿6号煤层为例,建立钻孔周围单元体瓦斯渗流模型,理论推导径向流场瓦斯压力分布特性,采用Comsol数值模拟得到不同抽采时间沿钻孔径向瓦斯压力分布云图;根据理论推导和数值模拟数据,结合临界瓦斯压力(0.5 MPa),得出有效抽采半径,并现场试验验证。结果表明:理论与模拟有效抽采半径结果相对误差率均小于10%,准确性较好;有效抽采半径与抽采时间线性相关,因现场实测有效抽采半径较为复杂,通过理论和数值模拟方法可预测有效抽采半径,为井下瓦斯的治理钻孔瓦斯抽采提供参考。
In order to predict effective extraction radius of drilling hole in gas control of coal mine,taking No.6 coal seam of Sijichun mine in Guizhou Province as an example,a gas seepage model of surrounding units of boreholes was established.Then,gas pressure distribution cloud chart along radial direction at different drilling time was obtained through Comsol numerical simulation.Finally,effective extraction radius was determined based on theoretical derivation and numerical simulation data while considering critical gas pressure(0.5 MPa),and verification was made with on-site test.The results show that relative error rate of theoretical and simulated effective extraction radius is less than 10%,verifying accuracy of both calculation results.Effective radius is linearly dependent on extraction time.Considering its complexity to measure effective radius on site,it can be obtained through theoretical and numerical simulation methods used in this paper,which provides a theoretical basis for underground gas control.
作者
邹士超
辛嵩
ZOU Shichao;XIN Song(College of Mining and Safety Engineering,Shandong University of Science and Technology,Qingdao Shandong 266590,China)
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2020年第4期53-59,共7页
China Safety Science Journal
关键词
钻孔瓦斯
抽采半径
临界瓦斯压力
渗流模型
钻孔间距
drilling gas
extraction radius
critical gas pressure
seepage model
distance between boreholes
作者简介
邹士超(1992—),男,山东聊城人,硕士研究生,研究方向为矿井瓦斯灾害预测与防治。E-mail:806574421@qq.com;通信作者:辛嵩(1968—),男,山东莱阳人,博士,教授,硕士生导师,主要从事矿井通风和灾害预防方面的研究工作。E-mail:543339783@qq.com。
