| 粘弹性岩石凿力-凿深特性和能量传递研究 |
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| 引用本文： | 王建华,甘海仁. 粘弹性岩石凿力-凿深特性和能量传递研究[J]. 矿冶工程, 2014, 34(3): 1-3. DOI: 10.3969/j.issn.0253-6099.2014.03.001 |
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| 作者姓名： | 王建华 甘海仁 |
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| 作者单位： | 长沙矿冶研究院有限责任公司, 湖南 长沙 410012 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)项目(2012CB724205) |
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| 摘 要： | 针对冲击钻进过程中粘弹性岩石力-凿深特性和能量传递问题进行了研究, 得出了杆体活塞模型情况下的冲击凿深函数和力-凿深曲线, 进一步分析了其能量传递过程和效率。结果表明, 弹粘性岩石的力-凿深曲线受速度阻尼的影响, 随着粘度增大, 其初始力从0点逐渐抬高, 最大凿深umax逐渐变小; 由于岩石粘性耗能的原因, 传递到岩石中的总能量ER加大, 最大凿深减少, 凿入效率降低。
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| 关 键 词： | 粘弹性岩石 能量传递 凿深 凿入效率 |
| 收稿时间： | 2014-01-05 |
Study of Force-Penetration Characteristic and Energy Transfer of Viscoelastic Rock |
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| WANG Jian-hua,GAN Hai-ren. Study of Force-Penetration Characteristic and Energy Transfer of Viscoelastic Rock[J]. Mining and Metallurgical Engineering, 2014, 34(3): 1-3. DOI: 10.3969/j.issn.0253-6099.2014.03.001 |
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| Authors: | WANG Jian-hua GAN Hai-ren |
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| Affiliation: | Changsha Research Institute of Mining and Metallurgy Co Ltd, Changsha 410012, Hunan, China |
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| Abstract: | The force-penetration characteristic and energy transfer of viscoelastic rock in percussive drilling has been studied, resulting in the penetration function of rigid piston model and force-penetration curve. Then the energy transfer process and its efficiency were all analyzed. The force-penetration curve of elastic viscous rock showed that with an influence of the velocity damping, the initial force gradually increased from 0 with an increase in the viscosity, while the maximum penetration depth (umax) gradually decreased. Due to viscous dissipation of rock, the total energy (ER) being transferred to rock increased with a decrease in the maximum penetration depth, resulting in a lower penetration efficiency. |
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| Keywords: | viscoelastic rock energy transfer penetration penetration efficiency |
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