组合封堵气囊治理回风隅角瓦斯技术  

Technology of treating return air corner gas using combined sealing air bag

作　　者：刘光明 LIU Guangming(Safety and Production Management Center,Shanxi Coking Coal Group Co.,Ltd.,Taiyuan 030000,China)

机构地区：[1]山西焦煤集团有限责任公司安全生产管理中心,山西太原030000

出　　处：《陕西煤炭》2024年第7期43-48,共6页Shaanxi Coal

基　　金：国家自然科学基金面上项目(51574138)。

摘　　要：由于回风隅角采用垛袋封堵、风筒布吊挂封堵和充气囊袋封堵工艺无法满足快速全断面封堵的要求,同时柔性轻便气囊存在承载压力小、难以复用的难题,设计一种能多次重复利用、适用工作面范围广、承载性好的隅角新型组合封堵气囊。试验发现,刚开始时气囊发生较大的变形速率,当接近额定工作压力0.05 MPa时,变形速率开始降低同时逐步平稳;在矸石的外力冲击影响下,气囊的形变量随着矸石质量的增大而增大,矸石回弹高度随着气囊的形变量增大而减小,气囊吸收矸石动能的效果随着矸石回弹高度减小而增大。现场试验表明,安设此气囊对回风隅角封堵后,采空区瓦斯浓度明显增大,升高15.62%,瓦斯浓度保持在1.495%左右;回风隅角处瓦斯浓度减少,由0.807%下降到0.671%,降低16.85%;工作面回风巷瓦斯浓度由0.624%下降到0.568%,降低8.97%;同时回风隅角和回风巷瓦斯浓度浮动小,保持平稳,采空区局部漏风显著减小,解决了回风隅角瓦斯超限的难题。In light of the fast full-section sealing can not be met using stacker bag,air duct hanging cloth and air-filling bag at the return air corner,plus the small bearing pressure and difficult reuse for flexible,light-weighted air bag,a new type of sealing air bag for the corner is designed,which can be multiple used with wide application and good bearing performance.Test shows that at beginning,the larger deformation rate occurs for the air bag.When its pressure closing to the rated working pressure of 0.05 MPa,the deformation rate starts to decline,and is gradually stable.Under the external force impact of gangue,the deformation of air bag increases with the increase of gangue quality,the resilient height of gangue decreases with the increase of air bag's deformation,and the effect of air bag's gangue dynamic energy-attracting is increased with the decrease of gangue's resilient height.On-site test shows that after the installation of the air bag for the corner sealing,the gas concentration in goaf is at about 1.495%,obviously being increased by 15.62%.The gas concentration at the return air corner decreases from 0.807% to 0.671%,decreased by 16.85%,and the concentration at the return air roadway of working face is decreased from 0.624% to 0.568%,decreased by 8.97%.At the same time,the gas concentrations at the return air corner and return air roadway are stable,and the local air leakage is considerably decreased,thus solving the issue of over limit of gas at the return air corner.

关 键 词：隅角封堵 采空区漏风 瓦斯超限 组合封堵气囊 

分 类 号：TD712[矿业工程—矿井通风与安全]