Three Dimensional Wave Field Characteristics Of Faults In The Process Of Advanced Seismic Exploration

In China,the coal mining conditions are complex,the mine safety accidents occur frequently,and the bad geological bodies may be encountered during the tunnel heading process,and the most typical geological structure is the fault.At present,the geophysical method has become a hot spot in the front of the head-on geological structure in the mine tunnel,so it is of great theoretical and practical significance to carry out the advance detection and diagnosis of the typical fault geological structure based on the seismic wave method.In this paper,the model of fault,the model of different fault category under the condition of laneway and the model of different fault fall under the condition of the roadway are established,and the effect of the cavities of the coal seam is considered.The numerical simulation calculation is carried out based on the high order staggered grid algorithm,and the faults with and without the influence of the roadway are compared and analyzed.The location of the receiving point,and the characteristics of the seismic wave field of different fault properties(positive / inverse,drop),the results show that: 1)the difference of seismic records received under the condition of and without the roadway is mainly on the resolution,and the non laneway relative to the model with the roadway has a clear seismic record,the same phase axis is continuous,and the degree of interference is small;2)Under the same model,the seismic records received by the side groups are more concentrated than the floor waves,with the strong continuity of the phase axis,the less interference and the easy recognition of the effective waves.3)the wave field snapshots of different drop faults are different,and the diffraction of the fault points can be clearly distinguished when the falling difference is relatively large,and the energy is more effective.Strong;4)under the same falling fault positive / reverse fault conditions,the position of the same source is compared to the reception of the effective wave signal of the positive / reverse fault,in which the effective wave signal of the reverse fault is stronger;5)the three different components of X,Y and Z receive the difference of the signal,in which the Z component receives the class Bie Qiquan of the effective wave group,its phase axis is continuous and the energy is also Relatively strong interference degree is lower.In Dun Tun mining area and the coal alley of Chicheng coalfield,the field detection comparison test has been carried out.The results show that the seismic wave method ahead detection technology and the amplitude energy anomaly diagnosis can effectively forecast the fault structure position,and provide the technical support for the safe and efficient construction of the coal mine tunnel.