| 爆炸应力波作用煤巷变形破坏模拟试验研究 |
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| 引用本文： | 陈蓥,韩军,宋卫华. 爆炸应力波作用煤巷变形破坏模拟试验研究[J]. 应用基础与工程科学学报, 2011, 19(6): 995-1002. DOI: 10.3969/j.issn.1005-0930.2011.06.017 |
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| 作者姓名： | 陈蓥 韩军 宋卫华 |
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| 作者单位： | 辽宁工程技术大学矿业学院,辽宁阜新,123000 |
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| 基金项目： | 国家自然科学基金项目，高等学校博士学科点专项科研基金 |
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| 摘 要： | 采用相似材料和数值模拟试验方法,利用数字散斑观测(DSCM)技术,对不同炮孔位置和装药量条件下煤巷变形破坏进行模拟试验研究,得到爆炸应力波在煤岩中的传播规律.试验结果表明:(1)爆炸应力波沿垂直巷道方向上传播为主,巷道顶板附近形成裂纹、破碎或坍塌区;随着装药量不断增加,应力波对上部岩体破坏力明显增大,应力波能量是影响巷道破坏程度的主要因素.(2)装药量为4.0g,炮孔距离分别为450mm和300mm时,第一次引爆(距离为450mm)后,巷道顶板附近出现裂缝,属于拉剪裂缝;第二次引爆(距离为300mm)后,巷道顶板附近裂缝较为发育,且巷道顶层出现部分塌落,属于重复拉剪破坏;装药量为8.0g,第三次引爆(距离为200mm)后,巷道顶板出现塌落,且四周破坏,说明随着炮孔距离推进和装药量增加,巷道变形破坏程度更严重.(3)数值计算结果表明,顶板受冲击作用和下沉位移较大,两边帮向巷道内部弯曲变形也较大,冲击载荷对巷道变形破坏影响较大,与相似材料试验结果具有一致性.
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| 关 键 词： | 爆炸应力波 煤巷破坏 数字散斑相关方法(DSCM) 模拟试验 |
Simulated Experiment on the Deformation and Failure Process of Coal Roadway at Blasting Wave |
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| CHEN Ying,HAN Jun,SONG Weihua. Simulated Experiment on the Deformation and Failure Process of Coal Roadway at Blasting Wave[J]. Journal of Basic Science and Engineering, 2011, 19(6): 995-1002. DOI: 10.3969/j.issn.1005-0930.2011.06.017 |
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| Authors: | CHEN Ying HAN Jun SONG Weihua |
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| Affiliation: | CHEN Ying,HAN Jun,SONG Weihua (School of Mines,Liaoning Technical University,Fuxin 123000,China) |
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| Abstract: | Adopting similar material simulation test and numerical simulation methods,having the aid of digital speckle correlation method(DSCM),the deformation and failure process of coal roadway was studied under the condition of the different of blast holes' positions and charge weights.The conclusions are as follows:(1)Blasting waves mainly propagate along the vertical coal roadway direction,crack,broken or collapsing areas take place nearby the tunnel roof.As charge weight increasing,the destructive power of stre... |
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| Keywords: | blasting wave coal roadway destruction digital speckle correlation method(DSCM) simulation test |
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