How many kinds of explosives may be used in the same drill hole?

In the context of mining operations and safety regulations, the use of explosives is strictly governed to minimize risks associated with detonation and to ensure the effectiveness of the blasting operation. When it comes to the number of different explosives that may be used in the same drill hole, established guidelines dictate that only one type of explosive should be employed.

Using a single type of explosive ensures that the performance, detonation characteristics, and the reaction properties are uniform within that hole, which significantly reduces complications that could arise from using multiple explosive types. Different explosives can have varying sensitivities, velocities, and effects, which could lead to unpredictable outcomes and heightened safety hazards if mixed in the same drill hole.

Furthermore, regulations and best practices in mining focus on maintaining safety and consistency to protect workers and the environment. By adhering to the guideline of using only one explosive per hole, mining operations can maintain greater control over the blasting process and mitigate risks associated with misfires or irregular detonations caused by incompatible explosives.