摘要:
针对综采工作面粉尘运移的问题,以陈蛮庄煤矿3604作业面为例,基于气固两相流理论,建立综采工作面三维模型。运用FLUENT数值模拟软件,对综采工作面粉尘弥散规律进行模拟分析,结果显示:综采工作面风流呈现“两区一带”的规律,即“低速风流区”、“高速风流区”和在呼吸带高度采煤机前滚筒下风向呈现长约20 m,高约0.7 m,风速2.64 m/s左右的“高速风流带”;粉尘随风流向工作面下风向人行道扩散,在呼吸带高度采煤机中心下风向大约8 m处,形成长约15 m,宽约1.3 m,高约0.9 m,粉尘浓度约为1 157~1 731 mg/m3的高浓度粉尘团,应作为煤矿开采过程中,粉尘防护重点区域。
Abstract:
Aiming at the problem of dust movement in the fully mechanized mining work, a 3D model of the fully mechanized mining face was established based on the gas-solid two-phase flow theory based on the 3604 face in Chenbanzhuang Coal Mine. The FLUENT numerical simulation software was used to simulate and analyze the dust dispersion law of the fully mechanized mining working face. The results show that the wind flow in the fully mechanized mining face presents the “two zones and one zone” law, that is, the “low speed air flow zone”, the “high speed air flow zone”, and the downwind direction of the front drum of the shearer of the breathing zone height is a “high-speed air flow belt” with a length of about 20 m, a height of about 0.7 m, and a wind speed of about 2.64 m/s. The dust diffuses with the wind to the sidewalk on the working surface. At the height of the breathing zone at the center of the shearer, the wind direction is about 8 m, forming a length of about 15 m, a width of about 1.3 m, and a height of about 0.9 m. The dust concentration is about 1 157 mg/m3 to 1 731 mg/m3 high-concentration dust mass should be used as a key area for dust protection during coal mining.
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