The standard method of sampling for collection of samples in advancing development faces . . . . . . . .

Solution(By Examveda Team)

Chip sampling is the standard method of sampling for the collection of samples in advancing development faces in metal mining.

In chip sampling, small chips or rock fragments are collected from the exposed face of the development area. This method allows for the collection of representative samples that can be analyzed to assess the quality and composition of the orebody as mining progresses.

Channel sampling involves cutting a channel or groove into the exposed rock face to collect a continuous sample along the length of the channel. While channel sampling is also commonly used in mining exploration and development, chip sampling is typically preferred for advancing development faces.

Bulk sampling involves collecting large, representative samples of ore or waste material from a specific area for detailed analysis. This method is usually employed for assessing the overall grade and characteristics of a deposit.

Radio meter refers to a device used for measuring radioactivity and is not directly related to the sampling method for advancing development faces in metal mining.

Therefore, Option A: Chip sampling is the correct method for collecting samples in advancing development faces in metal mining.