风幕封闭的综掘面硫化氢治理技术研究与应用  

Research and application of hydrogen sulfide control technology with enclosed air curtain in fully-mechanized excavation face

作　　者：汪伟[1,2] 贾宝山 祁云[1,2] WANG Wei;JIA Baoshan;QI Yun(College of Safety Science and Engineering,Liaoning Technical University,Fuxin Liaoning 123000,China;Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education,Liaoning Technical University,Huludao Liaoning 125100,China)

机构地区：[1]辽宁工程技术大学安全科学与工程学院,辽宁阜新123000 [2]辽宁工程技术大学矿山热动力灾害与防治教育部重点实验室,辽宁葫芦岛125100

出　　处：《中国安全科学学报》2020年第1期73-80,共8页China Safety Science Journal

基　　金：国家重点研发计划重点专项(2018YFC0807900)。

摘　　要：为解决综掘面掘进过程中硫化氢涌出影响矿井安全生产的问题,现场测试分析晋牛矿8116综掘面硫化氢的分布特征,提出利用风幕风机封闭综掘断面,防止硫化氢外溢的治理方案;依据势流叠加原理和流体力学理论,建立空间受限条件下风幕风机流场的数学模型;为验证该模型的正确性,在模拟巷道进行风幕射流速度衰减试验。结果表明:风幕风速随着射流距离的增加不断衰减,且呈现先急后缓的变化趋势,数学模型所计算出的理论风速与实测风速基本一致;径向射流风幕需要封闭的空间断面内,实测风速都在2. 7 m/s以上,能有效抑制硫化氢向外逸散。通过井下工程应用,该装置可使掘进机司机处的硫化氢体积分数由43. 5×10-6降至3. 2×10-6,治理效果显著。In order to avoid influence caused by hydrogen sulfide emission on production safety during mining process of fully-mechanized excavation faces,a new technical plan with wind-curtain ventilator to seal these faces was put forward based on site measurement and analysis of hydrogen sulfide distribution law of No. 8116 fully-mechanized excavation face in Jinniu Mine,aiming at preventing its overflow.Secondly,a mathematical model of wind-curtain dust-catching ventilator in confined space was established according to potential superposition principle and fluid mechanics theory. Finally,an air curtain jet velocity attenuation experiment was conducted to verify its rationality. The results show that wind curtain velocity will attenuate abruptly in early stage and then slowly later as jet distance grows,and theoretical wind velocity calculated through this model is basically consistent with measured one. In space sections where air curtain jet needs to be sealed,measured wind speed is all above 2. 7 m/s,which helps prevent hydrogen sulfide from leaking. Through field installation and application,concentration of hydrogen sulfide at driver’s position can be reduced from 72. 5 × 10-6 to 6. 3 × 10-6,thus achieving good control effect of hydrogen sulfide.

关 键 词：综掘工作面 风幕风机 煤矿硫化氢 环形射流 平行平面流 

分 类 号：X962[环境科学与工程—安全科学]