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| 预裂爆破中爆生裂缝扩展的机理探讨及预裂炮孔间距的设计方法 | |
| 引用本文： | 吴晓峰,宋照尚,李廷春. 预裂爆破中爆生裂缝扩展的机理探讨及预裂炮孔间距的设计方法[J]. 中国港湾建设, 2007, 0(1): 49-50,63 |
| 作者姓名： | 吴晓峰 宋照尚 李廷春 |
| 作者单位： | 1. 中交第一航务工程局有限公司,天津,300042 2. 中交一航局第四工程有限公司,天津,300456 3. 山东科技大学,山东,泰安,271019 |
| 摘 要： | 炸药爆炸产生的爆生裂缝是由爆炸应力波和爆生气体共同作用的结果。文中运用炸药爆炸的应力波理论,计算初始裂纹的长度;然后按照岩石的脆断理论计算爆生裂缝的最终扩展长度,对预裂爆破中爆炸作用过程和裂缝的扩展机理进行分析。同时还讨论了预裂炮孔间距的设计方法,认为在炮孔间距设计时,应考虑原生裂缝的存在。 |
| 关 键 词： | 预裂爆破 应力波理论 脆断理论 裂缝扩展 |
| 文章编号： | 1003-3688（2007）01-0049-02 |
| 修稿时间： | 2006-10-30 |
Discussion on Mechanism of Development of Cracks Resulted from Pre-splitting Blasting and Design Method for Determining Space of Blasting Holes |
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| WU Xiao-feng,SONG Zhao-shang,LI Ting-chun. Discussion on Mechanism of Development of Cracks Resulted from Pre-splitting Blasting and Design Method for Determining Space of Blasting Holes[J]. China Harbour Engineering, 2007, 0(1): 49-50,63 | |
| Authors: | WU Xiao-feng SONG Zhao-shang LI Ting-chun |
| Abstract: | Cracks produced in blasting, is the outcome of both blasting stress wave and blasting gas. In this paper, thestress wave theory of blasting is used to discuss cracking mechanism in pre-split blasting. Firstly the initial cracklength is calculated according to the stress wave theory: then, the ultimate cracking length caused by blasting is got bythe brittle fracture theory of rock. Also design method of blasthole spacing in pre-splitting blasting is discussed, andthe writers hold that primary fractures should be considered in process of hole-spacing design. |
| Keywords: | pre-splitting blasting stress wave theory brittle fracture theory cracking |
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