几年前小直径合金钎头曾在某矿进行试验，证明打眼速度较大钎头（直径为42、44、46毫米的）要提高30％左右，但由于加工没有彻底解决，因而未能及时推广应用。61年以来，针对该矿打眼速度慢的关键问题，又提出了采用小钎头凿岩的措施，并重新进行了造型、试制和试验等工作，由于对其形状及部分尺寸作了一些改进，试验结果证明，其打眼速度提高33％ A few years ago, a small diameter alloy drill bit had been tested in a mine to prove that the larger bit drilling head (diameter 42, 44, 46 mm) to be increased by about 30%, but because the processing is not completely resolved, and thus failed to timely Promote the application. In the past 61 years, aiming at the key problem of slowing the drilling of the mine, the measures of adopting small bit rock drilling have been put forward and the modeling, trial manufacture and test have been reformed. Due to some improvements on the shape and the part size, Test results show that the speed of their eye-catching 33%