This paper introduced the principle and method of protecting borehole wall blasting and its application in the Dongxia and Weifang coal mine.
本文介绍了护壁爆破原理和方法以及其在东峡煤矿、潍坊煤矿的应用情况。
The isochromatic fringes graphs of smooth blasting and cutting seam blasting of pipe protecting borehole wall were obtained upon dynamic photo-elasticity experiments on both kinds of blasting.
进行了光面护壁爆破和切缝护壁爆破技术的动态光弹性试验，获得了光面护壁爆破和切缝护壁爆破过程的等差条纹图。
The shear stress on smooth blasting of pipe protecting borehole wall between free face and protecting face reaches as high as 3.
进行了光面护壁爆破和切缝护壁爆破技术的动态光弹性试验，获得了光面护壁爆破和切缝护壁爆破过程的等差条纹图。
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