井下巷道定向和坡度的给点工作,过去一直是沿用手锤打眼定点的办法。由于井下巷道所有的作业面全部要经过定点后才能作业,当巷道掘进到一定距离时,还要进行延点工作,因此,定点工作在测量中占着重要地位。目前,我们每一巷道的定点全部工作需要20～30分钟左右,但其中手打眼要占20分钟左右。为了解决打眼定点问题,我们试制了石膏水泥椿,并获得成功。 Downhole roadway orientation and slope to the point of work, in the past has been the use of hand-hammer drilling fixed point approach. Since all the working surfaces of the underground tunnel have to go through the fixed-point operation, when the roadway is driven to a certain distance, the point-to-point work needs to be carried out. Therefore, the fixed-point work occupies an important position in the measurement. At present, all of our fixed-point work in each lane takes about 20 to 30 minutes, but hand-eye shots occupy about 20 minutes. In order to solve the fixed-point issue, we made a prototype of gypsum cement and succeeded.