文档介绍：硕士学位论文
深井开采爆破振动危害研究
Deep Mining Blasting Vibration Hazards Research
摘要
通过冬瓜山556采场的爆破振动监测、测试结果分析和研究,分析了爆破振动对采准巷道稳定性的影响,提出了控制爆破振动对采准巷道危害的具体措施,研究了爆破振动对地表建筑的影响。本文具体研究内容和成果如下:
(1)应用灰色关联度法分析了爆破振动特征参量与爆破条件的关联性,为研究爆破振动控制措施奠定了理论基础。
(2)利用经验公式对监测数据进行了拟合,得出了冬瓜山矿中深孔和大孔爆破振动的衰减规律。
(3)运用ANSYS/LS-DYNA模拟爆破振动对采准巷道的影响,结合冬瓜山矿具体情况结合动态应力比法,得出采用控制段药量降振的爆破振动安全判据。
(4)结合粗糙集和支持向量机基本理论,构建了爆破振动对民房破坏程度的粗糙集-支持向量机预测模型,并对冬瓜山爆破振动对地表民房破坏程度进行了预测,预测效果表明,粗糙集-支持向量机预测模型具有较好的预测效果。
关键词:爆破振动, ANSYS/LS-DYNA,安全判据,粗糙集,支持向量机
ABSTRACT
This study is based on the blasting vibration monitoring tests in Dongguashan 556 mining sites. Through analysis and research the test results, the law of blasting vibration’s affect on the stability of preparatory workings was revealed and the measures for reducing affect of blasting vibration on the preparatory workings’ stability were suggested. The blasting vibration on the surface of the architectural influence was studied. Specific research results are as follows:
(1) This paper applied gray pertinence method to analyze the relevance of the characteristic parameters of blasting vibration and blasting conditions and provides a theoretical basis for the study of blasting vibration control measures.
(2) This paper made use of empirical formula to fit the monitoring data and obtains the blasting vibration attenuation law of Dongguashan medium- deep and deep hole blasting.
(3) By using ANSYS/LS-DYNA, this paper simulates the influence of blasting vibration on workings, and arrives at the blast vibration safety criterion through controlling the explosive weight of subordinate blasting to reduce blasting vibration, in accordance with the specific circumstances of Dongguashan Mine and dynamic stress ratio method.
(4) bining the basic theory of rough set and support vector machine, this paper builds a rough set - support vector machine model to predict the destructiveness of blasting vibration to the farmer’s house, and predicts the destructiveness of blasting vibration