Noise risk classification of coal mine occupational health based on approximate Markov blanket and GBDT

doi:10.16265/j.cnki.issn1003-3033.2025.09.1075

Abstract

Abstract:

To accurately assess the impact of noise on the health of workers in fully mechanized mining face, the key influencing factors of noise occupational health were determined by using the theory of man-machine-environment-management system, combined with Fisher Score, maximum information coefficient and approximate Markov blanket method. The prediction model of coal mine noise risk classification based on the GBDT algorithm was constructed, and the Kappa coefficient and its accuracy were used as the index of model efficiency to compare and verify the accuracy of the model. The results show that the occupational health damage of noise in fully mechanized mining face is closely related to individual status, equipment configuration, environmental factors and occupational health management. Among these, job category, individual age, length of service, protection awareness, degree of equipment automation, pass rate of noise monitoring points, noise exposure, reverberation time and management institutions and personnel are the key indicators of occupational health risk classification and prediction. The accuracy of the occupation health risk classification prediction model of coal mine noise based on GBDT is up to 99.6%, and the average accuracy and Kappa coefficient are 98.3% and 0.958, respectively. The evaluation accuracy of six prediction models for noise occupational health risk classification in fully mechanized mining face is ranked as follows: GBDT > Genetic Algorithm optimization Random Forest(GA-RF)> Particle Swarm optimization Least Squares Support Vector Machine(PSO-LSSVM)> Random Forest(RF)> Support Vector Machine(SVM)> Decision tree.

Key words: approximate Markov blanket, gradient boosting decision tree (GBDT), coal mine noise, noise health risk classification, occupational health, Fisher Score

CLC Number:

X966

GAO Xiaoxu, TIAN Jiake, GAO Lu, DU Lu, FAN Mengjie. Noise risk classification of coal mine occupational health based on approximate Markov blanket and GBDT[J]. China Safety Science Journal, 2025, 35(9): 253-262.

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指标类型		目标类型	等级界限(可能遭受的噪声职业健康风险)
一级	二级	目标类型	Ⅰ(严重)	Ⅱ(可接受)	Ⅲ(潜在)
个体状况	个体年龄X₂/岁	效益型	[20,30)	[30,50]	(50,60]
	工龄时长X₃/a	成本型	(20,40]	[2,20]	(0,2)
	文化水平X₄/分	效益型	1	[2,4]	5
	专业技能X₅/分	效益型	1	[2,4]	5
	危害认知X₆/%	效益型	[0,80)	[80,95)	[95,100]
	防护意识X₇/%	效益型	[0,80)	[80,95)	[95,100]
设备配置	设备自动化程度X₈/%	效益型	[0,80)	[80,95)	[95,100]
	设备布局X₉/%	效益型	[0,80)	[80,95)	[95,100]
	工艺流程X₁₀/%	效益型	[0,80)	[80,95)	[95,100]
	噪声降吸装置X₁₁/%	效益型	[0,80)	[80,95)	[95,100]
	消声设备使用率X₁₂/%	效益型	[0,80)	[80,95)	[95,100]
	个体防护用具X₁₃/%	效益型	[0,80)	[80,95)	[95,100]
环境因素	距噪声源距离X₁₄/m	效益型	[0,20)	[20,90]	(90,200]
	噪声监测点合格率X₁₅/%	效益型	[0,80)	[80,95)	[95,100]
	噪声暴露量X₁₆/dB	成本型	[100,200]	[85,100)	[0,85)
职业健康管理	管理机构及人员X₁₈/%	效益型	[0,80)	[80,95)	[95,100]
	职业危害监测X₁₉/%	效益型	[0,80)	[80,95)	[95,100]
	职业卫生培训率X₂₀/%	效益型	[0,80)	[80,95)	[95,100]
	警告标识设置X₂₁/%	效益型	[0,80)	[80,95)	[95,100]
	职业病危害告知率X₂₂/%	效益型	[0,80)	[80,95)	[95,100]

因素	Fisher Score	因素	Fisher Score
X₁	0.289	X₁₂	0.322
X₂	0.250	X₁₃	0.662
X₃	0.827	X₁₄	0.176
X₄	0.165	X₁₅	1.592
X₅	0.147	X₁₆	3.663
X₆	0.016	X₁₇	0.228
X₇	0.752	X₁₈	0.640
X₈	0.093	X₁₉	0.064
X₉	0.051	X₂₀	0.014
X₁₀	0.008	X₂₁	0.013
X₁₁	0.306	X₂₂	0.014

因素	重要度	因素	重要度
X₁	0.246	X₁₂	0.052
X₂	0.264	X₁₃	0.186
X₃	0.267	X₁₄	0.131
X₄	0.157	X₁₅	0.379
X₅	0.018	X₁₆	0.706
X₇	0.268	X₁₇	0.206
X₈	0.246	X₁₈	0.356
X₉	0.053	X₁₉	0.109
X₁₁	0.072	—	—

数据编号	工种	监测地点	年龄/ 岁	工龄/ a	防护意识/%	设备自动化程度/%	监测点合格率/%	噪声暴露量 L_EX,8h/dB(A)	混响时间/s	管理机构及人员比例/%
1	采煤机司机	采煤机司机操作位	46	15	82	86	90	94.1	0.52	88
2	超前支护工	超前支护工操作位	49	18	86	85	79	82.1	0.65	81
3	刮板机司机	刮板机司机操作位	50	20	94	81	86	93.5	0.49	75
4	转载机司机	转载机司机操作位	37	11	81	87	93	92.7	0.73	83
5	破碎机司机	破碎机旁	42	13	89	88	85	95.3	0.55	90
6	乳化泵工	设备列车旁	45	10	90	93	89	96.4	0.62	85
7	带式输送机司机	带式输送机司机操作位	35	8	79	89	83	85.8	0.83	91
︙	︙	︙	︙	︙	︙	︙	︙	︙	︙	︙
612	带式输送机司机	带式输送机司机操作位	52	19	92	82	81	88.6	0.77	87

超参数	数值范围
迭代次数	[100,1 000],步长为100
模型学习率	0.001,0.01,0.02,0.03,…,0.1
树最大深度	[1,9],步长为2
划分所需最小样本数	[1,5],步长为1