| 爆破卸压关键参数对冲击危险性变化趋势的影响规律 |
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| 引用本文： | 吴玉文,王书文.爆破卸压关键参数对冲击危险性变化趋势的影响规律[J].煤矿开采,2012(1):79-82. |
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| 作者姓名： | 吴玉文 王书文 |
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| 作者单位： | 神华集团新街能源有限责任公司;天地科技股份有限公司开采设计事业部;煤炭科学研究总院开采设计研究分院 |
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| 基金项目： | 国家重点基础研究发展计划(973)项目(2010CB226806) |
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| 摘 要： | 从无限煤岩体内爆破后的静态效果角度研究了爆破卸压对冲击危险性变化趋势的影响规律。利用数值模拟手段,重点分析了保护带宽度b和炮孔俯角θ对巷道冲击危险性变化趋势的影响规律。结果表明,b值的合理范围应使卸压侧巷帮呈现小"内峰"、大"外峰"的应力分布状态,其他取值均不利于巷道冲击危险性的降低。爆破孔的俯角θ决定着帮部和底板的卸压效果消长关系。
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| 关 键 词： | 爆破卸压 冲击地压 影响因素 底板 |
Influence of Pressure-relief Blasting Parameters on Rockburst Danger Variation Tendency |
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| WU Yu-wen,WANG Shu-wen.Influence of Pressure-relief Blasting Parameters on Rockburst Danger Variation Tendency[J].Coal Mining Technology,2012(1):79-82. |
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| Authors: | WU Yu-wen WANG Shu-wen |
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| Affiliation: | 2,3(1.Xinjie Energy Co.,Ltd,Shenhua Group,Erdos 017000,China; 2.Coal Mining & Designing Department,Tiandi Science & Technology Co.,Ltd,Beijing 100013,China; 3.Coal Mining & Designing Branch,China Coal Research Institute,Beijing 100013,China) |
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| Abstract: | From static effect after blasting in coal and rock body,influence of pressure-relief blasting on rock-burst danger degree was researched in this paper.Applying numerical simulation,influence of protective zone width b and depression angle of blast-hole θ was analyzed.Results showed that rational b value should make stress take on small inner summit and large outer summit state at the pressure-released side of roadway,other b values could not decrease rock-burst danger degree,and that θ determined pressure-relief effect of roadway′s sides and floor. |
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| Keywords: | pressure-relief by blasting rock-burst influence factor floor |
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