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Thread drilling tools are widely used in tunnel construction with hydraulic drill rigs because they are efficient, fast, safe and environmentally friendly.
Tapered drilling tools are widely used for drifting and tunneling with Air-leg rock drills because they are easy to move, operate and maintain with little investment and cost.
Self drilling anchor bolts is a kind of rock bolt with the function of both drilling and anchoring. The rod can be extended and very convenient for construction work within a restricted area. Because they can't be replaced by other anchoring materials, they are extensively used in the anchoring of tunnel construction
Overburden drilling This method can prevent wall collapse or sand from blocking the drilling holes. With its 100% of hole forming rate it is widely used for the construction of tunnel entrance and penetration of broken rock zone