综掘面风流调控下粉尘双目标优化研究

doi:10.16265/j.cnki.issn1003-3033.2022.04.007

摘要/Abstract

摘要：

为解决煤矿综掘面局部通风方式下,风筒出风口风流状态不能根据掘进过程实际需求动态调控,造成巷道内粉尘严重积聚的问题,利用流场模拟试验方法,分析获取出风口风流参数变化下粉尘浓度的回归数据,以掘进机司机位置处呼尘及回风侧全尘质量浓度最低为优化目标,构建风流调控下的粉尘浓度双目标优化模型,基于粒子群算法求解该模型,并选取理想解作为最优风流调控方案;利用自主研制的风流调控装置分析井下测试及降尘效果。研究结果表明:经过最优风流调控,出风口距工作面5和10 m时,回风侧全尘质量浓度分别降低 38.55%和42.11%;掘进机司机位置呼尘质量浓度分别降低 26.05%和27.29%,为实现综掘面安全高效通风降尘提供依据。

关键词: 综掘面, 风流调控, 优化模型, 粒子群算法, 粉尘浓度

Abstract:

In order to solve the problem of heavy dust accumulation in roadways caused by the failure of current ventilation mode in coal mines to dynamically regulate wind state of its air outlets according to actual needs during tunneling process, flow field simulation test method was adopted to analyze and obtain regression data of dust concentration along with changes of air flow parameters of the outlets. Secondly, with the lowest respirable dust concentration at drivers' place and optimal total dust concentration at return side as goals, a dual-objective optimization model of dust concentration under control of airflow was established. Then, it was solved based on particle group algorithm, and ideal solution was selected as optimal airflow control plan. Finally, downhole test and dust reduction effect analysis were carried out using self-developed control device. The results show that after optimal airflow regulation, total dust concentration on return side is reduced by 38.55% and 42.11% when air outlet is 5 and 10 m respectively away from end face, and respirable dust concentration at drivers' place is reduced by 26.05% and 27.29%, thus providing theoretical basis for safe and efficient ventilation and dust reduction in fully mechanized faces.

Key words: fully mechanized face, airflow control, optimization model, particle swarm algorithm, dust concentration

龚晓燕, 童丹丹, 樊江江, 彭高高, 李珍, 赵少龙. 综掘面风流调控下粉尘双目标优化研究[J]. 中国安全科学学报, 2022, 32(4): 44-50.

GONG Xiaoyan, TONG Dandan, FAN Jiangjiang, PENG Gaogao, LI Zhen, ZHAO Shaolong. Study on dual-objective optimization of dust under airflow regulation in fully mechanized faces[J]. China Safety Science Journal, 2022, 32(4): 44-50.

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计算模型	设定
求解器	稳态求解
	绝对速度
	重力加速度(-9.81 m/s²)
湍流模型	Realizable k-ε
近壁处理	标准壁面函数
离散模型	开
组分运输	开
能量方程	关

边界条件	设定
入口边界类型	定流速入口
入口速度/(m·s^-1)	7.64
入口湍流强度/%	3.08
组分质量分数/%	1
入口水力直径/m	1.0
出口边界类型	流出

离散相模型	设定
相间耦合	开
相间耦合频率	20
升力	开
喷射源类型	面喷射
粒径分布规律	罗辛-拉姆勒分布
分布指数	1.62
质量流率/(kg·s^-1)	0.003 6
离散相边界类型	底板捕捉,壁面反射

方案	d /m	α /(°)	β /(°)
1	0.7	5	0
2	0.7	5	1
3	0.7	5	3
4	0.7	5	5
5	0.7	10	0
︙	︙	︙	︙
95	1.2	20	3
96	1.2	20	5

方案	d	α	β	C_s	C_h	V_s	V_h	W
1	0.7	5	0	244	289	0.69	1.37	0.148 4
2	0.7	5	1	274	298	0.66	1.38	0.121 5
3	0.7	5	3	328	306	0.61	1.41	0.091 5
4	0.7	5	5	378	306	0.54	1.45	0.066 8
5	0.7	10	1	277	309	0.59	1.37	0.146 0
︙	︙	︙	︙	︙	︙	︙	︙	︙
48	1.2	10	5	375	472	0.36	1.37	0.541 4
49	1.2	15	0	248	421	0.56	1.26	0.628 4