Variation and Prediction Methods of the Explosion Characteristic Parameters of Coal Dust/Gas Mixtures

Yingquan Qi; Xiangyang Gan; Zhong Li; Lu Li; Yan Wang; Wentao Ji

LAPSE:2023.28950

Published Article

LAPSE:2023.28950

Variation and Prediction Methods of the Explosion Characteristic Parameters of Coal Dust/Gas Mixtures

Yingquan Qi, Xiangyang Gan, Zhong Li, Lu Li, Yan Wang, Wentao Ji

April 12, 2023

Abstract
In order to investigate the change law of the explosion characteristic parameters of hybrid mixture of coal dust and gas, and then establish an effective prediction method of these parameters, the maximum explosion pressure, explosion index, and lower explosion limit of coal dust and gas mixtures were measured in a standard 20 L spherical explosion system. Four different kinds of hybrid mixture were selected in this study and they are composed of coal dust with different components and gas respectively. According to the measured results, the change law of the explosion characteristic parameters of hybrid mixture of coal dust and gas was analyzed, and the prediction method of these parameters was discussed. The results show that the addition of gas to a coal dust cloud can obviously increase its maximum explosion pressure and explosion index and notably reduce its minimum explosion concentration. On increasing the gas equivalent ratio, the maximum explosion pressure of coal dust and gas mixture increases linearly and the explosion index increases quadratically, while the decrease curve of the lower explosion limit is nonlinear. Based on these change laws, the methods for predicting the maximum explosion pressure and the explosion index of hybrid mixture of coal dust and gas were established respectively. The applicability of the existing methods for predicting the lower explosion limit of hybrid mixture to coal dust and gas mixture was demonstrated.

Record ID

LAPSE:2023.28950

Keywords

characteristic parameters, coal dust, gas, hybrid explosion, prediction model

Subject

Energy Systems

Suggested Citation

Qi Y, Gan X, Li Z, Li L, Wang Y, Ji W. Variation and Prediction Methods of the Explosion Characteristic Parameters of Coal Dust/Gas Mixtures. (2023). LAPSE:2023.28950

Author Affiliations

Qi Y: State Key Laboratory Cultivation Bases for Gas Geology and Gas Control, College of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China; The Collaboration Innovation Center of Coal Safety Production of Henan Province, Henan
Gan X: State Key Laboratory Cultivation Bases for Gas Geology and Gas Control, College of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China; The Collaboration Innovation Center of Coal Safety Production of Henan Province, Henan
Li Z: State Key Laboratory Cultivation Bases for Gas Geology and Gas Control, College of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China; The Collaboration Innovation Center of Coal Safety Production of Henan Province, Henan
Li L: State Key Laboratory Cultivation Bases for Gas Geology and Gas Control, College of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China; The Collaboration Innovation Center of Coal Safety Production of Henan Province, Henan
Wang Y: State Key Laboratory Cultivation Bases for Gas Geology and Gas Control, College of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China; The Collaboration Innovation Center of Coal Safety Production of Henan Province, Henan [ORCID]
Ji W: State Key Laboratory Cultivation Bases for Gas Geology and Gas Control, College of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China; The Collaboration Innovation Center of Coal Safety Production of Henan Province, Henan

Journal Name

Energies

Volume

14

Issue

2

Article Number

en14020264

Year

2021

Publication Date

2021-01-06