| 初始应力对缝槽卸压效果影响的数值分析 |
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| 引用本文： | 吴海进,林柏泉,杨威,姚倩,翟成.初始应力对缝槽卸压效果影响的数值分析[J].采矿与安全工程学报,2009,26(2). |
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| 作者姓名： | 吴海进 林柏泉 杨威 姚倩 翟成 |
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| 作者单位： | 中国矿业大学煤炭资源与安全开采国家重点实验室,安全工程学院,江苏,徐州,221008 |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展规划(973计划)，国家科技支撑计划，国家自然科学肇金青年科学基金 |
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| 摘 要： | 通过分析钻孔周围应力集中产生的"瓶颈效应",指出高压射流水力割缝技术是煤层卸压的重要手段.通过数值模拟手段重点研究垂直于缝槽平面应力和最大主应力与缝槽夹角对卸压的影响.研究得出,垂直于缝槽平面的应力越大,卸压率也越大,反之越小.最大主应力和缝槽夹角对卸压效果也有显著影响,但是其卸压等值线的最小压力梯度主要沿最大主应力方向,当夹角为60°时卸压效果最差,夹角为0°时卸压效果最好.进一步研究0°夹角的卸压情况,得出卸压率越大则卸压区域越小,应力集中区域相对更小,相对卸压区域可以忽略.
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| 关 键 词： | 水力割缝 最小压力梯度 卸压 应力集中 |
Numerical Analysis of the Pressure Relief Effect on Slot at Different Initial Stresses |
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| WU Hai-jin,LIN Bai-quan,YANG Wei,YAO Qian,ZHAI Cheng.Numerical Analysis of the Pressure Relief Effect on Slot at Different Initial Stresses[J].Journal of Mining and Safety Engineering,2009,26(2). |
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| Authors: | WU Hai-jin LIN Bai-quan YANG Wei YAO Qian ZHAI Cheng |
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| Affiliation: | State Key Laboratory of Coal Resources and Mine Safety;School of Safety Engineering;China University of Mining & Technology;Xuzhou;Jiangsu 221008;China |
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| Abstract: | Based on analyzing the "bottleneck effect" caused by the stress concentration around a drilling hole,the high-pressure jet current hydraulic slotting technology was the main method for pressure relief.The effect of the stress in the direction perpendicular to the slotting plate and the angles between the maximum main stress and the slots on the pressure relief is researched by numerical simulation.Results indicate that the pressure relief rate increases as the stress in the direction perpendicular to the sl... |
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| Keywords: | hydraulic slotting the minimum pressure grad pressure relief stress concentration |
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