| 特殊地质结构层状岩体微震传播规律试验研究 |
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| 引用本文： | 贾宝新,陈浩,王坤,李峰,周琳力.特殊地质结构层状岩体微震传播规律试验研究[J].岩土力学,2023,44(1):54-66. |
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| 作者姓名： | 贾宝新 陈浩 王坤 李峰 周琳力 |
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| 作者单位： | 辽宁工程技术大学 土木工程学院，辽宁 阜新 123000 |
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| 基金项目： | 国家自然科学基金面上项目（No. 51774173）；辽宁省‘兴辽英才计划’项目（No. XLYC2007163）；辽宁工程技术大学学科创新团队资助项目（No. LNTU20TD08）；辽宁省“百千万人才工程”资助（No. 2021921023）。 |
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| 摘 要： | 矿山工程地质中往往存在断层和采空区，微震信号传播经过断层和采空区时，其传播规律必然会发生改变，因此研究特殊地质结构微震信号传播规律具有重要意义。基于惠更斯原理，考虑不同层状岩体中微震波传播速度不同，建立了非均匀介质条件下微震波的波面方程，进而获得波面半径与入射角之间的关系。结合室内相似材料模型实验，验证了波面方程的适用性，同时总结了断层、采空区对微震信号传播的影响特征。研究结果表明：微震信号穿过断层的用时更长，断层的存在导致信号的能量（最大振速）发生较大幅度的衰减；微震信号穿过断层后会以原来的速度继续传播，信号能量的衰减并不会使微震信号的传播速度发生衰减；微震波穿过断层时的入射角越大，穿过断层的用时越长，信号的能量衰减越多；采空区的存在导致微震信号的传播速度发生衰减，震源与监测点之间的距离越近，采空区对微震信号相对传播速度的影响越大。
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| 关 键 词： | 波面方程 断层 采空区 传播规律 |
| 收稿时间： | 2021-12-28 |
Experimental study of microseismic propagation of layered rock mass with special geological structure |
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| JIA Bao-xin,CHEN Hao,WANG Kun,LI Feng,ZHOU Lin-li.Experimental study of microseismic propagation of layered rock mass with special geological structure[J].Rock and Soil Mechanics,2023,44(1):54-66. |
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| Authors: | JIA Bao-xin CHEN Hao WANG Kun LI Feng ZHOU Lin-li |
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| Institution: | School of Civil Engineering, Liaoning Technical University, Fuxin, Liaoning 123000, China |
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| Abstract: | In mining engineering geology, there are often faults and goafs. The law of the microseismic signal propagation through faults and goafs is bound to change, so it is important to study the propagation law of the microseismic signal in special geological structures. Based on the Huygens principle, the wave surface equation of microseismic waves in non-uniform medium conditions is established by considering the different propagation velocities of microseismic waves in different layered rock masses. Then the relationship between the wave surface radius and the incident angle is obtained. By combining with indoor similar material model experiment, the applicability of the wave surface equation is verified, and the influence characteristics of faults and goafs on the propagation of the microseismic signal are also summarized. The results show that the microseismic signal takes longer to cross the fault, and the presence of the fault causes a larger attenuation of the signal energy (maximum vibration velocity). The microseismic signal will continue to propagate at the original velocity after passing through the fault, and the attenuation of the signal energy does not lead to the attenuation of the propagation velocity of the microseismic signal. The larger the incident angle of the microseismic wave passing through the fault, the longer the time to pass through the fault, and the more the attenuation of the signal energy. The existence of the goaf gives rise to the attenuation of the propagation velocity of the microseismic signal, and the closer the distance between the seismic source and the monitoring point, the greater the influence of the goaf on the relative propagation velocity of the microseismic signal. |
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| Keywords: | wave surface equation fault goaf propagation law |
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