Affiliation:
1. State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Huainan, 232001, China
2. School of Earth and Environment, Anhui University of Science and Technology, Huainan, 232001, China
3. Key Laboratory of Geoscience Big Data and Deep Resource of Zhejiang Province School of Earth Sciences Zhejiang University, Hangzhou, 310058, China
Abstract
The boom-type roadheader is the main equipment for realizing the mechanization of coal drifting in coal mines, and it is an indispensable production equipment in major coal-producing countries. Substantial vibrations are generated during the operation of a roadheader; these vibrations carry substantial energy and, thus, can be regarded as a potential source and used for seismic advance detection purposes in mine drifts. Compared with a conventional exploration source, a roadheader source produces a complex continuous random signal. The shape of a seismic wavelet is uncertain and its duration is relatively long; thus, it must be processed into a conventional pulse signal before it can be used for subsequent processing and analysis. Therefore, based on the advantages of seismic interferometry in random signal processing, two seismic interference techniques, namely, deconvolution and cross-correlation, are introduced for constructing a compound interference algorithm. On the basis of a theoretically derived formula, a random signal impulse processing experiment is conducted using field-acquired source signals from a roadheader; this approach resolves the problem that cross-correlation alone cannot yield ideal results. Hence, a feasible algorithm for the impulse processing of a random signal, namely, the compound interference algorithm, is proposed. The algorithm deconvolves each seismic trace to obtain the reference trace and other receiver traces after compressing the wavelet. Then, the reference trace and each receiver trace are cross-correlated, and the wavelet time delay information of each correlated wavelet pulse, namely, the wavelet time delay information of the receiver trace relative to the reference trace, is obtained. Accordingly, the direct wave and reflected waves are recognized. To evaluate the performance of the algorithm, an algorithm application experiment is conducted for another group of random source signals that were collected by a roadheader under different coal drift conditions. Again, the algorithm processing results are consistent with the single-shot record characteristics of an explosive source. Consequently, the proposed algorithm can satisfy the requirements for engineering exploration and analysis. A comprehensive analysis further demonstrates that the compound interference algorithm is both feasible and effective and that the processed seismic signals can be used for subsequent processing and interpretation.
Publisher
Environmental and Engineering Geophysical Society
Subject
Geophysics,Geotechnical Engineering and Engineering Geology,Environmental Engineering
Reference33 articles.
1. The Coal Cutter as a Seismic Source in Channel Wave Exploration
2. Application of the comprehensive forecast system for water-bearing structures in a karst tunnel: a case study
3. Directional balancing for seismic and general wavefield interferometry
4. Cheng, J.L.
Li, F.
Peng, S.P., and
Sun, X.Y., 2014, Research progress and development direction on advanced detection in mine roadway working face using geophysical methods: Journal of China Coal Society, 39, 1742– 1750.
5. Cheng, J.L.
Xie, C.
Sun, X.Y.
Chen, Q.
Liu, H., and
Wang, H.Y., 2015, Preliminary study on theory and method of seismic advance detection with drilling: Annual Meeting of Chinese Geoscience Union, 1, 1765– 1766.
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献