As an explosion control measure, rock dusting has been used in underground coal mines in many major coal producing countries with different standards. The effectiveness of the rock dust in reducing explosion intensity has been proven by historic events and laboratory experiments. The main functions of rock dust in controlling mine explosions (i.e., isolator, …
• The Coal Mines (Precautions Against Inflammable Dust) Regulations 1956 set out requirements for the maintenance of incombustible matter in mine roadway dust including sampling, sample analysis, type of analysis and keeping records of analyses.
Dhanbad Coal Mine Disasters (1965 and1975) – India. The Dhanbad coal mine disaster occurred on the night between 27th and 28th May in the Dhori colliery near Dhanbad, the major coal mining town in India. The disaster led to the deaths of 375 miners. It was a firedamp and coal dust explosion.
The NIOSH Mining Program's ongoing intramural research addresses methane and coal dust explosion problems in the coal mining industries. Laboratory and/or mine-site research is conducted to identify and evaluate improved rock dusting practices and sampling methods and new technologies and structures to mitigate underground coal mine explosions.
specific request, a review of passive and triggered explosion barriers in underground coal mines was commissioned (Zhou and Panawalage, 2001). Although explosion barriers used in conjunction with stone-dusting1 are thought by many to be an essential tool in the control of explosions in underground coal mines, their use is by no means ubiquitous.
This research study identifies suggestions for improvement of explosion control practices and new research on current rock dusting and rock dust sampling methods that would be applicable to all US coal mines and that would significantly improve coal dust explosion safety. Major improvements can be made through compre-
Anatomy of a Float Coal Dust Explosion Coal combustion front Underlying rock dust dispersion lags behind the combustion front and unable to quench combustion front Surface coal dust disperses first Layered dust Float coal dust (0.24 mm or 0.01 in) Rock dust (25.4 mm or 1.0 in)
This 1980 MSHA film clip demonstrates various ventilation techniques to control dust including the use of proper face ventilation to effectively remove airbo...
In 1978, the institute of engineering physics in mine engineering was established to conduct fundamental researches in coal mining engineering and applications. In 2000, the state-of-art key lab, Southwest Resource Exploitation and Environmental Disaster Control Engineering, was accredited by the Ministry of Education (MOE).
The NIOSH Mining Program conducts research to identify and then mitigate the causes of underground coal mine explosions. Research strategies include eliminating ignition sources, minimizing methane concentrations and coal dust accumulations, applying proper dispersible rock dust in sufficient quantity at all locations, using supplemental protection such as passive and active barriers to ...
Coalbed gas production, which evolved from coal mine hazard to environmental concern, through past, present, and future contributions is modest compared to the total United States production of unconventional gas (Figure 2.5).In 2009, coalbed gas production was less than one-third of tight gas and less than one-half of shale gas; however, coalbed gas and tight gas will remain almost constant ...
Explosibility of coal dust has been studied in laboratories, in explosion galleries and in an experimental coal mine. The data and results obtained from the tests showed that finely pulverized coal dust has a lower explosive limit of 0.035 to 0.08 ounces per cubic foot.
explosion control in coal mining. Anatomy of a Float Coal Dust Explosion Coal combustion front Underlying rock dust dispersion lags behind the combustion front and unable to quench combustion front Surface coal dust disperses first Layered dust Float coal …
Clauses of the Coal Mines Regulations relating to M 3006 MRTS Guideline for Coal Dust Explosion Prevention and Suppression are indicated in the References section of the uideline. The epartment of Mineral Resources document M 3006 MRTS TR Technical Reference Material for Coal Dust Explosion Prevention and Suppression provides technical reference material for the uideline.
The methods of preventing the explosion hazard as well as methane emission control in the Polish coal mining sector are presented. Methane hazard prevention should be adapted to levels and other ...
Prevention. To prevent coal dust explosions and limit the amount of inhaled dust particles to reduce injury, limestone powder is sprayed along the walls of mines on a regular basis. In the event of an explosion, the surface limestone layer absorbs heat that is generated from the explosion to reduce its intensity.
At coal mine working faces, simultaneous application of three basic elements reduces the methane explosion hazard: (1) adequate ventilation, (2) regular monitoring of gas conc entrations, and (3) the elimination of ignition sources. This paper reviews the application of these elements in a manner relevant to Chinese coal mines. Adequate