【作者】 左前明；

【导师】 傅贵；

【作者基本信息】 中国矿业大学（北京） ， 安全技术及工程， 2014， 博士

【摘要】 大采高综采作为现代化高效采煤方式，应用日益广泛，但高强度开采造成工作面粉尘浓度过高，且其产尘规律与粉尘运移特征较传统采高不同，防治困难，严重影响了作业安全和职工健康。以典型的神东补连塔煤矿22306大采高工作面为例，实测分析了风流、粉尘运动特点及粉尘粒度、浓度分布情况，以此为基础，建立了气－固两相流动数学模型，对风流-粉尘的耦合运移规律进行了数值模拟，总结出了大采高综采工作面与普通采高综采工作面风流-粉尘运移规律的区别；根据22306大采高工作面产尘特点，通过喷嘴雾化试验优选了适用于该大采高工作面不同作业地点的3类最佳喷嘴，并研制了喷吸结合新型雾化降尘装置，最终形成了包括采煤机喷雾、液压支架喷雾及挡尘帘在内的大采高综采工作面防尘技术体系。通过工程应用，工作面各生产工序全尘、呼尘平均降尘率达91.84%、90.63%，工作面环境和安全程度得到了极大改善。更多还原

【Abstract】 Fully mechanized caving for large mining height is being more widely used in coal mines nowas a modern effective mining method. As a fact，high-strength mining has caused a higher dustconcentration in the working face where the dust production law and dust migration characteristicsare different from that of traditional mining height. Moreover，it’s hard to prevent and control，which affects the safety production and workers’ health. Taking the typical large mining height22306working face of Bulianta coal mine as an example, the characteristics and migration featuresof dust particles had been measured and analyzed. Based on it， a mathematical model of twophases flowing was built to numerically simulate the air-dust coupling migration， and thedifference between large and normal mining height had been concluded. According to the dustproduction characteristics， three kinds of nozzles which were suitable for different sites ofworking face had been optimized through nozzles spraying test. In addition， new atomizer spraydust suction device had been developed. Finally， the dustproof system for large mining heightfully mechanized caving face which consists of shearer spraying， supports spraying and dustproofnet had been formulated. After the application， the average dust fall rate of whole dust andrespirable dust could reach91.84%and90.63%respectively， which meant that the environmentand safety degree got considerable promotion.更多还原