Study of the effect of macropore diameter on the formation of the bone-like apatite in the carbonate-contained HA/β-TCP ceramics;

The drilling speed of smaller diameter blast holes was compared with that of bigger diameter blast holes,based on the blasting result of smaller explosive cartridges in combination with the smaller blast holes,the usage of smaller diameter hole blasting is proposed.

The problems in slope and its construction of old surface mine are analyzed,the presplitting blasting parameters suitable for large-diameter deep hole of surface mine are determined in practice based upon the analysis of mine rock breaking principle.

Meanwhile, the following steps should be taken including the revision of the standard index, the increase of perforator evaluation types, an introduction to the evaluation scheme of large aperture and high.

To ensure the quality of large aperture and deep perfusion stake foundation construction, a series of steps are taken according to the key working procedure or where quality problem may happen incidentally, so as to have good effect.

The principle of the system of interferometer in large aperture image spectrometer has been expatiated.