Daliuta Coal Mine of CHN Energy Shendong Coal Group Co. , Ltd.
CCTEG Chongqing Research Institute Co. , Ltd.

针对大采高综采工作面粉尘污染严重、降尘效果不佳的问题,以大柳塔煤矿开采层作业区为例,运用数值模拟的方法对喷雾参数进行优化,通过对现有喷雾降尘技术的梳理与比较,提出了支架接尘、煤机内外喷雾与尘源跟踪喷雾相结合的综合降尘技术。现场应用效果表明:风速为1.5m/s时优先选用HH9.5喷嘴;随着压力的增大,喷雾面积及高浓度喷雾区域呈上涨趋势,压力为6MPa时经济效益最佳;喷雾综合降尘技术对总粉尘的降尘率达90.11%~94.43%,对呼吸性粉尘的降尘率达81.96%~84.40%,工作面空间内的总粉尘质量浓度可低至20mg/m3,呼吸性粉尘质量浓度低至10mg/m3。综上所述,喷雾综合降尘技术能够有效降低工作面粉尘浓度,提升煤矿安全生产水平,可为大采高综采工作面粉尘防治工作提供有益参考。

Aiming at the problems of serious dust pollution and poor dust removal effect in the fully-mechanized mining face with large mining height, we took the coal seam operation area of Daliuta Coal Mine as an example, and optimized the spray parameters using numerical simulation. By combing and comparing the existing spray dust removal technologies, a comprehensive dust removal technology was proposed combining support dust collection, spray inside and outside coal shearer and dust source tracking spray. The performance of the optimized spray dust removal system was verified by field experiments, and the field application and effect test were carried out. The results show that HH9. 5 nozzles are preferred when the wind speed is 1. 5 m/ s. With the increase of pressure, the spray area and high concentration spray area shows a rising trend, and the economic benefit is the best when the pressure is MPa. The removal rates of total dust and respiratory dust can reach 90. 11% ~94. 43%, 81. 96% ~84. 40%, and the total dust and respiratory dust mass concentration in the working face space can be as low as mg/ m and mg/ m , respectively. In summary, the spray comprehensive dust removal technology can effectively reduce the dust concentration of the working face, improve the safety level of coal mine production, and provide a useful reference for the dust control of the fully-mechanized mining face with large mining height.

韩文杰,张小涛,张文政.大采高综采面喷雾降尘系统优化与应用分析[J].煤炭工程,2024,56(11):96-102.