Exposure of weak roof in junctions of a development district in a coal – McqOptions

MCQOPTIONS

1.	Exposure of weak roof in junctions of a development district in a coal mine can be decreased by
A.	increasing dimension of panel barrier
B.	stitching side walls
C.	increasing support density at junctions
D.	staggering the junctions
Answer» E.

Discussion

No Comment Found

Related MCQs

<p>When a double ended ranging drum shearer cuts coal in a longwall face,</p>
<p>The three segments, whose synchronous functioning is essential for GPS operations, are</p>
<p>Apart from mining of coal, the longwall mining method has been practiced for mining the deposits<br /> of</p>
<p>Nystagmus is a miner’s disease associated with</p>
<p>A dump truck powered by 350 kW engine is running at a speed of 35 km/h. Considering the<br /> transmission efficiency of the truck as 85%, the rim pull of the truck in kN is</p>
<p>Equipment used in mining of placer deposits is</p>
<p>The roof bolt that follows the principle of point anchorage is</p>
<p>The equipment that is NOT used in hard rock metal mining drivage is</p>
<p>As per the Indian Electricity Rules 1956, the maximum permissible length of a flexible cable used<br /> with an electric rope shovel in m is</p>
<p>In a surface mine, sound pressure level at a location generated by operation of a dozer and a drill<br /> respectively are 80 dBA and 60 dBA, when operated independently. The sound pressure generated<br /> by the dozer compared to the drill is higher by a factor of</p>