Forward simulation of fault detection by transmitting channel wave in thin alternating coal seams

Authors

MA Yanlong, Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China

Abstract

In order to study the feasibility of the fault detection by transmitting channel wave in thin alternating coal seams of southwestern region, a representative area was selected, and a coal mine in Panzhihua Coal Industry Group was selected as the research object. A three-dimensional geological model with three alternating coal seams containing three partings, three partings and faults and without parting was established based on actual geological data. Through the forward simulation and analysis of the characteristics of the wave field and the frequency dispersion of the channel waves of the three dimensional elastic wave, the validity of the amplitude attenuation coefficient imaging in the channel wave detection of the development location and the extension direction of the faults in the thin alternating coal seams was summarized, and combined with the actual application, the propagation velocity, the frequency dispersion characteristics, the influence of the faults and the partings on the propagation of the transmitting channel waves in the thin alternating coal seams were discussed. The results indicated that for the detection of the transmitting channel waves in the thin alternating coal seams, the faults plaid a leading role in the influence on the propagation of the transmitting channel waves in thin alternating coal seams, a parting of less than 0.5 m had little influence on the development and energy imaging of the channel waves, in the case of the same thickness of the coal seams, the dominant frequency of the model with a parting was lower than that of the model without parting, the channel waves can detect relatively accurately the thin alternating coal seams of 2 m thick and with a parting of less than 0.5 m. the research indicate that the transmitting channel waves can detect the location, strike and extension of a fault with the throw bigger chan 1/2 thickness of the coal seam in the thin alternating coal seams, provide reference for the detection of the structures in the thin alternating coal seams in the southwestern region.

Keywords

thin alternating coal seams, transmission channel wave, fault, southwest China

DOI

10.3969/j.issn.1001-1986.2021.02.029

Recommended Citation

M. (2021) "Forward simulation of fault detection by transmitting channel wave in thin alternating coal seams," Coal Geology & Exploration: Vol. 49: Iss. 2, Article 30.
DOI: 10.3969/j.issn.1001-1986.2021.02.029
Available at: https://cge.researchcommons.org/journal/vol49/iss2/30

Reference

[1] 胡国泽,滕吉文,皮娇龙,等.井下槽波地震勘探:预防煤矿灾害的一种地球物理方法[J]. 地球物理学进展,2013,28(1):0439-0451. HU Guoze,TENG Jiwen,PI Jiaolong,et al. In-seam seismic explorationa techniques:A geophsical method predictting coal-mine disaster[J]. Progreess in Geophysics(in Chinese),2013,28(1):0439-0451.

[2] 袁亮,张平松.煤炭精准开采地质保障技术的发展现状及展望[J].煤炭学报,2019,44(8):2277-2284. YUAN Liang,ZHANG Pingsong.Development status and prospect of geological guarantee technology for precise coal mining[J].Journal of China Coal Society,2019,44(8):2277-2284.

[3] 郭银景,巨媛媛,范晓静,等.槽波地震勘探研究进展[J].煤田地质与勘探,2020,48(2):216-227. GUO Yinjing,JU Yuanyuan,FAN Xiaojing,et al. Progress in research of in-seam seismic exploration[J].Coal Geology & Exploration,2020,48(2):216-227.

[4] 王季,李刚,吴国庆,等.采煤工作面地质异常体透射槽波探测技术[J].煤炭科学技术,2016,44(6):159-163. WANG Ji,LI Gang,WU Guoqing,et al. Transmitted channel wave detecting technology of geologic anomalous body in coal mining face[J].Coal Science and Technology,2016,44(6):159-163.

[5] 程建远,聂爱兰,张鹏.煤炭物探技术的主要进展及发展趋势[J].煤田地质与勘探,2016,44(6):136-141. CHENG Jianyuan,NIE Ailan,ZHANG Peng. Outstanding progress and development trend of coal geophysics[J]. Coal Geology & Exploration,2016,44(6):136-141.

[6] 任亚平.槽波地震勘探在煤矿大型工作面的应用[J].煤田地质与勘探,2015,43(3):102-104. REN Yaping. Application of ISS in supper large coal face[J].Coal Geology & Exploration,2015,43(3):102-104.

[7] 金军,徐宏杰,桑树勋,等.贵州省黔北煤田含煤地层特征分析[J].中国煤炭地质,2015,27(6):1674-1803. JIN Jun,XU Hongjie,SANG Shuxun,et al. Coal-bearing strata characteristic analysis in Qianbei coalfield[J]. Coal Geology of China,2015,27(6):1674-1803.

[8] 四川省煤田地质局.四川省煤炭资源潜力评价[R].成都:四川省煤田地质局,2011:32-49,417-456. Sichuan Coalfield Geology Bureau. Sichuan coal resource potential evaluation[R].Chengdu:Sichuan Coalfield Geology Bureau, 2011:32-49,417-456.

[9] 匡伟,李德春,张昭,等.含夹矸煤层的Love型槽波频散特征[J].煤矿开采,2015,20(6):23-26. KUANG Wei,LI Dechun,ZHANG Zhao,et al. Dispersion characteristics of love channel waves in coal bed with dirt band[J]. Coal Mining Technology,2015,20(6):23-26.

[10] 荣晓伟.含夹矸煤层槽波频散特性及其影响因素分析[J]. 中国煤炭地质,2015,27(7):77-79. RONG Xiaowei. Channel wave dispersion features in coal seam with gangue and its impacting factors[J]. Coal Geology of China,2015,27(7):77-79.

[11] 苏晓云.复合煤层中夹矸对槽波探测解释断层落差的影响[J].煤田地质与勘探,2020,48(3):182-187. SU Xiaoyun.Influence of parting in composite coal seam on interpretation of fault throw by channel wave seismic exploration[J].Coal Geology & Exploration,2020,48(3):182-187.

[12] 苏晓云.我国主要矿区典型煤层槽波赋存发育特征研究[J].煤炭工程,2020,52(10):137-142. SU Xiaoyun.The occurrence and development characteristics of channel wave in main mining areas of China[J]. Coal Engineering,2020,52(10):137-142.

[13] 杨辉.薄煤层透射槽波探测技术及应用[J].煤田地质与勘探,2020,48(3):176-181. YANG Hui.Detection technique and application of transmission in-seam wave in thin coal seam[J].Coal Geology & Exploration,2020,48(3):176-181.

[14] 余为维,冯磊,杜艳艳,等. 煤层陷落柱的三维地震槽波正演模拟[J].煤炭技术,2019,38(3):73-76. YU Weiwei,FENG Lei,DU Yanyan,et al.Forward modeling of 3D seismic channel wave in coal seam subsided column[J].Coal Technology,2019,38(3):73-76.

[15] 程建远,姬广忠,朱培民.典型含煤模型Love型槽波的频散特征分析[J].煤炭学报,2012,37(1):67-72. CHENG Jianyuan,JI Guangzhong,ZHU Peimin.Love channel-waves dispersion characteristic analysis of typical coal models[J].Journal of China Coal Society,2012,37(1):67-72.

[16] 王季,李建政,吴海,等.透射槽波能量衰减系数成像与陷落柱探测[J].煤炭科学技术,2015,43(1):108-111. WANG Ji,LI Jianzheng,WU Hai,et al.Tomography of transmission in-seam wave attenuation coefficient and detection of collapse columns[J].Coal Science and Technology,2015,43(1):108-111.

[17] 凌春霞,冼伟东.槽波地震勘探技术在工作面采前探测中的应用[J].煤炭技术,2018,37(7):109-111. LING Chunxia,XIAN Weidong.Application of slot wave seismic exploration technology in pre-mining exploration of working face[J]. Coal Technology,2018,37(7):109-111.

[18] 李刚.煤矿井下工作面内隐伏断层透射槽波探测技术[J].煤田地质与勘探,2016,44(5):142-145. LI Gang.Detection technique of transmission in-seam wave for concealed fault in working face of underground coal mine[J].Coal Geology & Exploration,2016,44(5):142-145.

[19] MASON I M,BUCHANAN D J,BOOER A K.Channel wave mapping of coal seams in the United Kingdom[J].Geophysics,1980,45(7):1131-1143.

[20] MASON I M. Algebraic reconstruction of a two-dimensional velocity inhomogeneity in the high hazles seam of thoresby colliery[J].Geophysics,1981,46(3):298-308.

[21] 张国恩.槽波地震勘探技术在采煤工作面构造探测中的应用[J].煤矿安全,2020,51(8):164-168. ZHANG Guo'en. Application of slot wave seismic exploration technology in coal mining face structure detection[J]. Safety in Coal Mines,2020,51(8):164-168.