Manufacturing head Difference between Dth Drilling and Top hammer Drilling And problem associate with Top hammer Drilling.

Question

Accepted Answer

DTH drilling is used for deeper and larger holes while top hammer drilling is used for smaller and shallower holes.

DTH drilling uses a pneumatic hammer that is located at the bottom of the drill string while top hammer drilling uses a hammer that is located at the top of the drill string.
DTH drilling is more efficient for deeper and larger holes as it can penetrate harder rock formations.
Top hammer drilling is more suitable for smaller and shallower holes as it is more accurate and has less deviation.
One problem associated with top hammer drilling is that it can cause excessive wear and tear on the drill bit due to the high frequency of impacts.
Another problem is that it can cause damage to the drill string due to the high torque and vibration.
DTH drilling can also have problems with deviation if the drill string is not properly stabilized.
Additionally, DTH drilling can cause damage to the surrounding rock formation due to the high energy impact of the hammer.

Accepted Answer

Typically the maximum size for DTH drilling in a production environment is 229mm. Top hammer drilling is ideal for shorter depths, producing faster penetration rates than DTH and lower fuel consumption with higher mobility. Typically the maximum size for top hammer drilling in a production environment is 140mm

Manufacturing head Difference between Dth Drilling and Top hammer Drilling And problem associate with Top hammer Drilling.

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