What type of hammer should be chosen for open pit mines and quarries?
Drilling in open-pit mines and quarries usually requires relatively durable down-the-hole hammer, because quarries usually require long-term work, and it is not cost-effective to replace the hammer frequently. Some better down-the-hole hammer can be repaired and used many times before being completely replaced, such as changing the direction of the outer tube of the hammer.
Drilling of building stones (marble, etc.) pays more attention to hole straightness. In drilling holes with a diameter larger than 89mm, the down-the-hole type usually has better hole straightness than the top hammer type.
Exploration drilling requires work at relatively remote construction sites with poor related facilities. Therefore, the requirements for down-the-hole hammer are simple design, high reliability, and adaptability to high wind pressure drilling.
Reverse circulation impact drilling is also commonly used. This sampling method is relatively more cost-effective than diamond core drilling. The process used by the reverse circulation hammer is the same as that of the ordinary down-the-hole hammer, but it uses a reverse circulation drill pipe. High-pressure air is blown into the gap between the inner and outer walls of the drill pipe, and then the drill cuttings are discharged from the inner wall of the drill pipe. , and then use a dust bag to collect the drill cuttings.
In actual use, one important factor must always be considered, that is, the drill operator. An experienced drill operator can effectively adjust the drilling parameters to reduce the probability of hammer failure and increase the life of the hammer.
There are many options for hammer on the market, ranging from cheap to high-end. However, measuring the value of an hammer is not only about its material and design itself, but more importantly, it is about the balance between the efficiency it brings to users and the cost.
For example, an hammer is very cheap and durable, but its fuel consumption is very high. As a result, the cost of rock meters is very high, and it cannot be said to be a very good hammer. Another hammer is very expensive, but it also brings high efficiency and low cost per rock meter, so this is a good hammer.
Of course, as a user, you also need to consider whether the hammer manufacturer can provide sufficient technical support and usage guidance. This is also very important and can effectively help our users improve drilling efficiency and reduce usage costs.
