气液两相射流冲蚀性能的研究  

Study on Erosion Capability of Gas-liquid Two-phase Jet

作　　者：魏思祥[1] 杨威[2] 乔时和[2] 

机构地区：[1]平顶山天安煤业股份有限公司十二矿,河南平顶山467013 [2]中国矿业大学安全学院,江苏徐州221116

出　　处：《煤矿安全》2017年第4期13-15,19,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51404261);江苏省基础研究计划(自然科学基金)资助项目(BK20140196);中国博士后科学基金资助项目(2015T80236;2014M551057)

摘　　要：含气率是影响气液两相射流冲蚀性能的关键参数。通过对不同进气压力两相射流的冲蚀性能进行实验研究,分析了射流的冲击力大小与其破碎煤体深度之间的关系。研究表明:气液两相射流的冲击力大小与其破碎煤岩的深度成正比,冲击区内的静压越大,冲蚀能力越强;当进气压力为0.6 MPa时,气液两相射流与纯水射流相比,平均冲蚀能力可提高近28%,有效提高射流破岩效率,降低系统的作业压力,增强系统的安全可靠性。Gas containing rate is the key parameter that affects impact erosion capability of gas-liquid two-phase jet. We analyzed the relationship between impact force of gas-liquid two-phase jet and crushing depth of coal by the experiment research on different inlet pressure erosion performance of two phase flow. Research shows that the impact force size of gas-liquid two-phase jet is proportional to the crushing depth of coal and rock; the greater static pressure of gas-liquid two-phase jet in its impact zone is, the stronger its impact erosion capability is; when inlet pressure is 0.6 MPa, compared to the water jet, the average impact erosion capacity of gas-liquid two-phase jet can increase nearly 28%. Therefore, the gas-liquid two-phase jet can effectively improve iet rock breaking efficiency, reduce the operating pressure of system, and enhance the safety and reliability of system.

关 键 词：含气率 气液两相射流 冲蚀能力 冲击力 静压 水力割缝 高压水射流 

分 类 号：TD713[矿业工程—矿井通风与安全]