煤矿典型致灾水源瞬变电磁三分量响应特征研究
发布时间：2019-06-24 16:12
【摘要】：矿井突水是仅次于煤与瓦斯突出的煤矿第二大灾害事故,诱发矿井突水的主要水源有含(导)水陷落柱、老空水和含(导)水断层等。因此,查明这些煤矿隐蔽致灾水源的发育位置及范围,是避免突水事故发生的关键。目前,探查煤矿灾害水源的矿井地球物理方法主要有矿井直流电阻率法和矿井瞬变电磁法,其中矿井瞬变电磁法以其施工便捷、工作效率高和对低阻体反映灵敏等特点被广泛应用于煤矿灾害水源的探查,但仅限于测量发射线圈法向二次磁场分量,由于缺少水平分量的测量数据信息,不能很好确定灾害水源的分布范围和产状。因此,研究测量发射线圈二次磁场水平分量,开展二次磁场三分量响应特征的研究,不仅具有理论意义,而且对于实际探测资料的处理和解释具有重大的指导作用。本文基于矿井瞬变电磁法基本理论,依据物理模拟相似性准则,采用物理模拟方法,对诱发煤矿突水的典型隐蔽致灾水源:含(导)水陷落柱、老空水和含(导)水断层三种低阻体的瞬变电磁三分量响应进行了物理模拟,并针对老空水的响应特征依据时域有限差分方法进行了数值模拟,选择典型矿井进行试验,经过对数据进行分析和解释,得出如下结论:(1)当含(导)水陷落柱、老空水以及含(导)水断层三种低阻体关于探测测线(即X轴)对称的情况下,测得的Z分量的瞬变电磁信号感应信号最强,X分量感应信号较弱,比Z分量小一个数量级,但能通过X分量信号强度确定含水异常体边界,Y分量由于低阻体关于接收线圈对称,测得感应信号相互抵消,因此接收到的均为空气中干扰信号。(2)当含(导)水陷落柱、老空水以及含(导)水断层三种低阻体关于探测测线(即X轴)不对称的情况下,测得的Z分量的瞬变电磁信号感应强度最强,X、Y分量感应信号较弱,比Z分量小一个数量级,综合多个方向探测分析X、Y分量信号感应信号强度,可以划定低阻体边界范围。(3)老空水三分量响应数值模拟的实验结果与物理模拟实验结果一致。探测线圈临近老空水时,Z分量有较为明显的增大,能大致确定老空水的边界范围;在老空水边界时X分量感应信号达到最大,到达老空水中间位置时,X分量变为最小;Y分量因老空水关于接收线圈对称,感应比较弱。(4)在某矿探测老空水试验结果与物理数值模拟实验结果基本一致,进一步说明三个方向分量的综合反演解释能更好的反映煤矿典型致灾水源的发育范围,通过三分量的信息解释,可以极大提高矿井瞬变电磁法的解释精度。
[Abstract]:The water inrush in the mine is the second major disaster of the coal mine after the coal and gas outburst, and the main water source of the water inrush in the mine is the water-containing (water-guiding) water-sinking column, the old-air-water and the water-containing fault. Therefore, it is necessary to find out the development position and scope of the hidden disaster-causing water source in these coal mines, which is the key to avoid the occurrence of water-inrush accidents. At present, the mine geophysical method for the exploration of the coal mine disaster water source mainly includes the mine direct current resistivity method and the mine transient electromagnetic method, in which the mine transient electromagnetic method is widely applied to the exploration of the coal mine disaster water source by the characteristics of convenient construction, high working efficiency and sensitivity to low resistance body reflection, But only the normal secondary magnetic field component of the transmitting coil is measured, and the distribution range and the occurrence of the disaster water source cannot be well determined due to the lack of the measurement data information of the horizontal component. Therefore, the research on the secondary magnetic field level component of the transmission coil and the study of the three-component response characteristic of the secondary magnetic field is not only of theoretical significance, but also has a great guiding function for the processing and interpretation of the actual detection data. Based on the basic theory of mine transient electromagnetic method, this paper, based on the physical simulation similarity criterion, adopts the physical simulation method and the typical concealed disaster-causing water source for the water inrush in the coal mine. In this paper, the three-component response of the transient electromagnetic three-component response of the water and the water-containing fault is simulated, and the response characteristics of the old air-water are simulated by the finite difference method in the time domain. The typical mine is selected for testing, and the data is analyzed and explained. The following conclusions are drawn: (1) When the water-containing (conductive) water-fall column, the old-air water and the three low-resistance bodies with (conduction)-water faults are symmetrical with respect to the detection line (i.e., the X-axis), the induced signal of the transient electromagnetic signal of the Z-component is the strongest, and the X-component induction signal is weak, An order of magnitude is smaller than the Z component, but the boundary of the aqueous anomaly can be determined by the signal strength of the X component, and the Y component is offset against each other due to the fact that the low resistance body is symmetrical with respect to the receiving coil, so that the received signal is an interference signal in the air. (2) when the water-containing (conducting) water-sinking column, the old-air water and the three low-resistance bodies containing (conducting) water faults are not symmetrical with respect to the detection line (i.e., the X-axis), the measured Z-component transient electromagnetic signal has the strongest induction intensity, the X-and Y-component induced signals are weak, In one order of magnitude smaller than the Z component, the signal strength of the X and Y component signals is detected and analyzed in a plurality of directions, so that the boundary range of the low resistance body can be defined. And (3) the experimental results of the three-component response numerical simulation of the old air water are consistent with the physical simulation experiment results. when the detection coil is close to the old empty water, the Z component is obviously increased, so that the boundary range of the old air water can be roughly determined; when the X component induction signal reaches the maximum at the time of the old air water boundary, the X component becomes the minimum when the detection coil reaches the middle position of the old air water; The Y component is symmetrical with respect to the receiving coil due to the old air-water, and the induction is weak. (4) The result of the test of the old and empty water in a mine is basically the same as that of the physical numerical simulation experiment, and the comprehensive inversion explanation of the three directional components can be further explained, and the development range of the typical disaster-induced water source in the coal mine can be better reflected, and the three-component information interpretation is adopted, And the interpretation precision of the mine transient electromagnetic method can be greatly improved.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD745;P631.325
本文编号：2505190
[Abstract]:The water inrush in the mine is the second major disaster of the coal mine after the coal and gas outburst, and the main water source of the water inrush in the mine is the water-containing (water-guiding) water-sinking column, the old-air-water and the water-containing fault. Therefore, it is necessary to find out the development position and scope of the hidden disaster-causing water source in these coal mines, which is the key to avoid the occurrence of water-inrush accidents. At present, the mine geophysical method for the exploration of the coal mine disaster water source mainly includes the mine direct current resistivity method and the mine transient electromagnetic method, in which the mine transient electromagnetic method is widely applied to the exploration of the coal mine disaster water source by the characteristics of convenient construction, high working efficiency and sensitivity to low resistance body reflection, But only the normal secondary magnetic field component of the transmitting coil is measured, and the distribution range and the occurrence of the disaster water source cannot be well determined due to the lack of the measurement data information of the horizontal component. Therefore, the research on the secondary magnetic field level component of the transmission coil and the study of the three-component response characteristic of the secondary magnetic field is not only of theoretical significance, but also has a great guiding function for the processing and interpretation of the actual detection data. Based on the basic theory of mine transient electromagnetic method, this paper, based on the physical simulation similarity criterion, adopts the physical simulation method and the typical concealed disaster-causing water source for the water inrush in the coal mine. In this paper, the three-component response of the transient electromagnetic three-component response of the water and the water-containing fault is simulated, and the response characteristics of the old air-water are simulated by the finite difference method in the time domain. The typical mine is selected for testing, and the data is analyzed and explained. The following conclusions are drawn: (1) When the water-containing (conductive) water-fall column, the old-air water and the three low-resistance bodies with (conduction)-water faults are symmetrical with respect to the detection line (i.e., the X-axis), the induced signal of the transient electromagnetic signal of the Z-component is the strongest, and the X-component induction signal is weak, An order of magnitude is smaller than the Z component, but the boundary of the aqueous anomaly can be determined by the signal strength of the X component, and the Y component is offset against each other due to the fact that the low resistance body is symmetrical with respect to the receiving coil, so that the received signal is an interference signal in the air. (2) when the water-containing (conducting) water-sinking column, the old-air water and the three low-resistance bodies containing (conducting) water faults are not symmetrical with respect to the detection line (i.e., the X-axis), the measured Z-component transient electromagnetic signal has the strongest induction intensity, the X-and Y-component induced signals are weak, In one order of magnitude smaller than the Z component, the signal strength of the X and Y component signals is detected and analyzed in a plurality of directions, so that the boundary range of the low resistance body can be defined. And (3) the experimental results of the three-component response numerical simulation of the old air water are consistent with the physical simulation experiment results. when the detection coil is close to the old empty water, the Z component is obviously increased, so that the boundary range of the old air water can be roughly determined; when the X component induction signal reaches the maximum at the time of the old air water boundary, the X component becomes the minimum when the detection coil reaches the middle position of the old air water; The Y component is symmetrical with respect to the receiving coil due to the old air-water, and the induction is weak. (4) The result of the test of the old and empty water in a mine is basically the same as that of the physical numerical simulation experiment, and the comprehensive inversion explanation of the three directional components can be further explained, and the development range of the typical disaster-induced water source in the coal mine can be better reflected, and the three-component information interpretation is adopted, And the interpretation precision of the mine transient electromagnetic method can be greatly improved.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD745;P631.325
【参考文献】
相关期刊论文 前2条
1 吴小平,汪彤彤;利用共轭梯度算法的电阻率三维有限元正演[J];地球物理学报;2003年03期
2 于景惃;刘振庆;廖俊杰;蒋宗霖;孙伟涛;;全空间瞬变电磁法在煤矿防治水中的应用[J];煤炭科学技术;2011年09期
，本文编号：2505190
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