UNSAFE ACTS, UNSAFE CONDITIONS, NEAR MISS and ACCIDENT

FAN LAWS The fan laws are a set of proportionalities relating each of the following parameters of airflow with fan speed (n), air density...

Motive column Motive column is a height of imaginary column of air that produces a pressure equal to difference of pressure between...

Roof Bolt:- It is made of MS or TMT steel bar & fixed in a hole by drilling vertical in roof & it grips the strata & support the...

Natural ventilation- Mine Airflow caused by pressure difference between upcast & downcast shaft [Because of unequal densities of weight...

Remote sensing is the science (and to some extent ,art) of acquiring information about the Earth's surface without actually being in...

•Ignition temperature:- The minimum/lowest temperature at which any substance or gas starts to burn. Ignition temp.of methane is usually...

BREAK DETECTOR It is used to detect cracks or breaks in blasting hole in U/G Mines. Regulation require that no shot hole shall be charged...

CLASS 1 - GUN POWDER CLASS 2 - NITRATE MIXTURE (EXAMPLE- GN/1 , POWERFLO, GODYNE, PENTADYNE ETC.) CLASS 3- NITRO COMPOUNDS. EXAMPLE-...

Kuz ram model is used to predict blast fragmentation distribution in mining industry. This model uses rockmass property , Blast pattern...

Composition of Atmospheric Air : Exposure LIMITS - Threshold limit values (TLV): It is the maximum/minimum concentration of constituent...

ROCK BURST Rock burst is a case of rock failure in underground that combines suddenness and violence on a sufficiently large scale to...

Solid blasting - solid blasting is a new approach blasting system by eliminating a cutting methodology for generating free face. In this...

Explosive is the mechanical mixture of substances chemical or chemical compound that can be exploded by application of fire or...

It is the ratio between length of advanced face to the Length of drilled hole. In drilling technology we consider a important factor to...

Low Rank coal. High Rank coal •Low carbon • High carbon content content •Low calorific ...

PRESSURE 1mmHg=13.6mmwg=133.3N/m²(pa) 1mmwg=9.81N/m²(pa) 1atm=10.36m of water = 760 MM of mercury 1 bar = 10⁵ pa = 1 atm 1mmwg=1kg/m²...

It is a process by which compressed Carbon di-oxide or Nitrogen gas is circulated to underground mine through borehole or pipe. •It is...

CLASSIFICATION OF COAL MINES- Degree of gassiness (A/c to Emission of gas) 1. % of Inflammable gas on the general body of air. 1st degree ...

Contiguous Seam Extraction Parting Between two seam less than 9 mtrs but more than 3 mtrs.. TOP Seam ------------------------------------...