The research works in this thesis are as follows:1. The critical pressure and conditions of drilling hole burst are determined through the physics experiment of drilling hole burst.
本文所做的研究工作如下： 1．通过钻孔冲击物理试验，研究了钻孔冲击的临界压力，以及钻孔冲击的条件；通过数值模拟，与物理试验相同的试验结果相验证，并揭示了钻孔冲击时卸载的应力降以及能量释放特征。
参考来源 - 构造应力型冲击地压发生条件研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Measure the approximate dimension of drilling hole.
测量打孔珍珠大致尺寸。
Product specification is a circular grinding mill, plane, grinding, drilling hole etc.
产品规格有外圆砂轮、平面磨、磨片、开孔钻头等。
The mine acquired good geological effect and economical benefit by Validating of drilling hole.
经钻孔验证，取得了良好的地质效果和经济效益。
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