Comparative study of the explosion pressure characteristics of micro- and nano-sized coal dust and methane–coal dust mixtures in a pipe
Abstract Coal dust explosion accidents often cause substantial property damage and casualties and frequently involve nano-sized coal dust. In order to study the impact of nano-sized coal on coal dust and methane–coal dust explosions, a pipe test apparatus was used to analyze the explosion pressure c...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2020-01-01
|
| Series: | International Journal of Coal Science & Technology |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s40789-019-00289-w |
| _version_ | 1818333096620064768 |
|---|---|
| author | Bo Tan Huilin Liu Bin Xu Tian Wang |
| author_facet | Bo Tan Huilin Liu Bin Xu Tian Wang |
| author_sort | Bo Tan |
| collection | DOAJ |
| description | Abstract Coal dust explosion accidents often cause substantial property damage and casualties and frequently involve nano-sized coal dust. In order to study the impact of nano-sized coal on coal dust and methane–coal dust explosions, a pipe test apparatus was used to analyze the explosion pressure characteristics of five types of micro-nano particle dusts (800 nm, 1200 nm, 45 μm, 60 μm, and 75 μm) at five concentrations (100 g/m3, 250 g/m3, 500 g/m3, 750 g/m3, and 1000 g/m3). The explosion pressure characteristics were closely related to the coal dust particle size and concentration. The maximum explosion pressure, maximum rate of pressure rise, and deflagration index for nano-sized coal dust were larger than for its micro-sized counterpart, indicating that a nano-sized coal dust explosion is more dangerous. The highest deflagration index K st for coal dust was 13.97 MPa/(m·s), indicating weak explosibility. When 7% methane was added to the air, the maximum deflagration index K st for methane–coal dust was 42.62 MPa/(m·s), indicating very strong explosibility. This indicates that adding methane to the coal dust mixture substantially increased the hazard grade. |
| first_indexed | 2024-12-13T13:46:12Z |
| format | Article |
| id | doaj.art-c77c8ecaa9bc408f8c5c013c70b12afa |
| institution | Directory Open Access Journal |
| issn | 2095-8293 2198-7823 |
| language | English |
| last_indexed | 2024-12-13T13:46:12Z |
| publishDate | 2020-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | International Journal of Coal Science & Technology |
| spelling | doaj.art-c77c8ecaa9bc408f8c5c013c70b12afa2022-12-21T23:43:25ZengSpringerOpenInternational Journal of Coal Science & Technology2095-82932198-78232020-01-0171687810.1007/s40789-019-00289-wComparative study of the explosion pressure characteristics of micro- and nano-sized coal dust and methane–coal dust mixtures in a pipeBo Tan0Huilin Liu1Bin Xu2Tian Wang3School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing)School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing)School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing)School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing)Abstract Coal dust explosion accidents often cause substantial property damage and casualties and frequently involve nano-sized coal dust. In order to study the impact of nano-sized coal on coal dust and methane–coal dust explosions, a pipe test apparatus was used to analyze the explosion pressure characteristics of five types of micro-nano particle dusts (800 nm, 1200 nm, 45 μm, 60 μm, and 75 μm) at five concentrations (100 g/m3, 250 g/m3, 500 g/m3, 750 g/m3, and 1000 g/m3). The explosion pressure characteristics were closely related to the coal dust particle size and concentration. The maximum explosion pressure, maximum rate of pressure rise, and deflagration index for nano-sized coal dust were larger than for its micro-sized counterpart, indicating that a nano-sized coal dust explosion is more dangerous. The highest deflagration index K st for coal dust was 13.97 MPa/(m·s), indicating weak explosibility. When 7% methane was added to the air, the maximum deflagration index K st for methane–coal dust was 42.62 MPa/(m·s), indicating very strong explosibility. This indicates that adding methane to the coal dust mixture substantially increased the hazard grade.https://doi.org/10.1007/s40789-019-00289-wA pipe test apparatusNano-sizedCoal dust explosionMethane/coal dust explosionPressure characteristics |
| spellingShingle | Bo Tan Huilin Liu Bin Xu Tian Wang Comparative study of the explosion pressure characteristics of micro- and nano-sized coal dust and methane–coal dust mixtures in a pipe International Journal of Coal Science & Technology A pipe test apparatus Nano-sized Coal dust explosion Methane/coal dust explosion Pressure characteristics |
| title | Comparative study of the explosion pressure characteristics of micro- and nano-sized coal dust and methane–coal dust mixtures in a pipe |
| title_full | Comparative study of the explosion pressure characteristics of micro- and nano-sized coal dust and methane–coal dust mixtures in a pipe |
| title_fullStr | Comparative study of the explosion pressure characteristics of micro- and nano-sized coal dust and methane–coal dust mixtures in a pipe |
| title_full_unstemmed | Comparative study of the explosion pressure characteristics of micro- and nano-sized coal dust and methane–coal dust mixtures in a pipe |
| title_short | Comparative study of the explosion pressure characteristics of micro- and nano-sized coal dust and methane–coal dust mixtures in a pipe |
| title_sort | comparative study of the explosion pressure characteristics of micro and nano sized coal dust and methane coal dust mixtures in a pipe |
| topic | A pipe test apparatus Nano-sized Coal dust explosion Methane/coal dust explosion Pressure characteristics |
| url | https://doi.org/10.1007/s40789-019-00289-w |
| work_keys_str_mv | AT botan comparativestudyoftheexplosionpressurecharacteristicsofmicroandnanosizedcoaldustandmethanecoaldustmixturesinapipe AT huilinliu comparativestudyoftheexplosionpressurecharacteristicsofmicroandnanosizedcoaldustandmethanecoaldustmixturesinapipe AT binxu comparativestudyoftheexplosionpressurecharacteristicsofmicroandnanosizedcoaldustandmethanecoaldustmixturesinapipe AT tianwang comparativestudyoftheexplosionpressurecharacteristicsofmicroandnanosizedcoaldustandmethanecoaldustmixturesinapipe |