目前我国煤矿综掘工作面主要采用高压喷雾、除尘风机、长压短抽通风等措施进行粉尘防治工作，虽取得了一定成效，但由于各降尘措施的局限性、经济性等原因，部分综掘工作面依旧存在粉尘浓度超限的问题。论文通过设计综掘工作面气室降尘技术，以期在实际生产中发挥重要作用，改善煤矿综掘工作面作业环境，对综掘面粉尘防治工作具有重要的指导意义。

论文以巴拉素煤矿2号煤二号回风大巷综掘工作面为研究对象，构建粉尘运动数学模型，结合风幕射流理论及现有降尘措施的优缺点，提出并设计了综掘工作面气室降尘技术，基于数值模拟和现场实验对设备布置参数进行优化，以提高其降尘效率。

通过对比长压短抽通风、单一风幕控尘和气室降尘技术的风流场模拟结果，确定气室降尘技术在实际生产应用具备可行性与有效性；影响气室降尘技术的因素为气室封闭区域控尘效果和除尘风机抽尘净化能力。

通过现场实验，采用固定变量法对气室降尘技术中的设备布置进行优化，结果表明：正压风筒出风口位置存在临界值，距综掘面过远会造成掘进巷道二次扬尘可能性增加，距综掘面过近会破坏气室封闭效果，正压风筒出风口距综掘面15 m降尘效果最佳；风幕布置位置仅影响气室封闭区域的范围，不会提高气室降尘技术的降尘效率；在只采取长压短抽通风方式的降尘措施时，巷道内粉尘扩散严重，且会在综掘面工作区域形成涡流区，严重影响井下工作人员的健康；风袖布置于正压风筒中上部，且直径为0.3 m时，风袖口出射风流对巷道内风流场扰动作用最小，气室降尘技术降尘效率最佳；在不改变负压风筒吸风量的前提下，负压风筒末端直径越小气室降尘技术效果越好，在负压风筒末端直径从0.8 m改为0.6 m时，气室封闭区域内降尘效率提高45.4%，气室封闭区域外降尘效率提高3.7%。

At present, China's coal mines mainly use high-pressure spraying, dust fans, long pressure and short extraction ventilation and other measures for dust prevention and control work, which has achieved certain results, but due to the limitations of each dust reduction measures, economic and other reasons, some of the comprehensive excavation work face still has the problem of dust concentration over the limit. The paper aims to play an important role in improving the working environment of the coal mining face by designing the air chamber dust reduction technology for the heaving face, which is an important guideline for dust prevention and control work at the heaving face.

The paper takes the No.2 coal No.2 return air tunnel heaving workface of Balasu coal mine as the research object, constructs a mathematical model of dust movement, combines the wind curtain jet theory and the advantages and disadvantages of existing dust reduction measures, proposes and designs the air chamber dust reduction technology for the heaving workface, and optimises the equipment arrangement parameters through numerical simulation and field experiments in order to improve its dust reduction efficiency.

By comparing the simulation results of air flow field of long pressure and short extraction ventilation, single air curtain dust control and air chamber dust reduction technology, it was determined that the air chamber dust reduction technology is feasible and effective in actual production application.

The results show that there is a critical value for the location of the outlet of the positive pressure duct, which is too far from the header face and will increase the possibility of secondary dust emission in the roadway, and too close to the header face will destroy the effect of the air chamber closure, and the outlet of the positive pressure duct is 15 m away from the header face with the best dust reduction effect. The dust reduction efficiency of the air chamber technology will not be improved if the air curtain is positioned in the closed area of the air chamber, and the dust reduction efficiency of the air chamber technology will not be improved. On the premise of not changing the suction volume of the negative pressure duct, the smaller the diameter of the end of the negative pressure duct, the better the effect of the air chamber dust reduction technology. When the diameter of the end of the negative pressure duct is changed from 0.8 m to 0.6 m, the dust reduction efficiency within the closed area of the air chamber increases by 45.4%, and the dust reduction efficiency outside the closed area of the air chamber increases by 3.7%.

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