| 高压气体诱发煤岩动力破坏的实验研究 |
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| 引用本文： | 丁言露,岳中琦.高压气体诱发煤岩动力破坏的实验研究[J].地质力学学报,2021,27(4):643-651. |
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| 作者姓名： | 丁言露 岳中琦 |
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| 作者单位： | 北京大学工学院, 北京100871;北京大学北京天然气水合物国际研究中心, 北京100871;香港大学土木工程系, 香港特别行政区999077 |
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| 基金项目： | 香港研究资助局资助项目（HKU17204415，HKU17207518） |
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| 摘 要： | 为了研究高压气体对煤岩材料变形破坏的作用，自主设计并制造了含高压气体煤岩实验装置，通过测量气体泄压作用诱发的煤岩动力破坏现象，研究了高压气体对煤岩材料变形破坏的作用。实验表明，当气体泄压速率小时，煤岩仅会出现轻微变形；当气体泄压速率大时，煤岩会产生破裂和破碎现象。同时发现煤岩的破坏程度不仅取决于气体的泄压速率，还取决于孔隙气体的压强。当气体泄压速率和气体压强都达到一定临界值时，煤岩才会发生剧烈破碎。通过气体压强与应变之间的关系，确定了煤岩发生破裂和破碎的临界气体压强。
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| 关 键 词： | 气体泄压 变形 破裂 破碎 临界气压 |
| 收稿时间： | 2021/4/29 0:00:00 |
| 修稿时间： | 2021/7/1 0:00:00 |
Experimental study on the dynamic rupture of coal and rock caused by high-pressure gas |
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| DING Yanlu,YUE Zhongqi.Experimental study on the dynamic rupture of coal and rock caused by high-pressure gas[J].Journal of Geomechanics,2021,27(4):643-651. |
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| Authors: | DING Yanlu YUE Zhongqi |
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| Institution: | 1.College of Engineering, Peking University, Beijing 100871, China2.Beijing International Research Center for Gas Hydrate, Peking University, Beijing 100871, China3.Department of Civil Engineering, The University of Hong Kong, Hong Kong SAR 999077, China |
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| Abstract: | A special test apparatus has been designed and used to study the effect of high-pressure gas on the deformation and failure of coal and rock. Dynamic ruptures of coal and rock are carried out by gas decompression. The results show that low gas decompression rate only causes deformation of coal specimens slightly while high gas decompression rate leads to fracture and outburst phenomenon. The degree of damage of rocks depends on not only the gas decompression rate but also the gas pressure. Violent fragmentation occurs when gas decompression rate and high saturation pressure reach critical values. According to the relationship between the decompressed gas pressure and strain, the critical gas pressures are determined for the fracture and fragmentation of specimens. |
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| Keywords: | gas decompression deformation fracture fragmentation critical gas pressure |
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