Study of Influence of Regional Geodynamic Background on Strata Behaviors in China's Tongxin Mine

IF 1.1 4区地球科学 Q3 GEOLOGY

Resource Geology Pub Date : 2016-01-01 DOI:10.1111/rge.12082

Ying Chen, Hongwei Zhang, Bin Yu, Zhijie Zhu, Wenda Wu, Yunpeng Li

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引用次数: 5

Abstract

Strata behaviors are mainly affected by regional geodynamic background. The influence of rock mass stress and energy distribution on strata behaviors in the Tongxin mine is studied in terms of regional tectonic movement, seismic activity and tectonic stress field. The results show that the extrusion lifting movement of Kouquan fault adjacent to the Tongxin mine results in the stress concentration in the rock of the Carboniferous coal bed and accumulation of a large amount of elastic energy and forms structural background of Tongxin mine. Due to various seismic activities in the mine area, the strain energy is known to reach much higher levels, up to 0.5×108 J1/2. Since the stratigraphic structure is sensitive to the mining operation, the strain energy could cause strong strata behaviors. A special geological structure model of the Tongxin mine is established based on the geodynamic division method. The distribution of regional structure stress field is determined by the rock mass stress analysis system. Based on this model, Tongxin mine is divided into five areas with high stress, eight areas with low stress and eight areas with gradient stress. The strong strata behaviors mostly occur in high stress areas. These results could provide guidance to predict the strength of regional or mine pressure and control strata behavior in different areas.

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中国同心矿区域地球动力背景对地层行为的影响研究

地层行为主要受区域地球动力背景的影响。从区域构造运动、地震活动和构造应力场等方面研究了同心矿岩体应力和能量分布对地层行为的影响。结果表明，与同心矿相邻的口泉断裂挤压抬升运动，导致石炭系煤层岩石应力集中，大量弹性能聚集，形成同心矿的构造背景。由于矿区各种地震活动，已知应变能达到更高水平，可达0.5×108 J1/2。由于地层结构对采矿作业很敏感，应变能会引起强烈的地层行为。基于地球动力学划分方法，建立了同心矿特殊的地质构造模型。区域结构应力场的分布是由岩体应力分析系统确定的。基于该模型，将同心矿划分为5个高应力区、8个低应力区和8个梯度应力区。强地层行为多发生在高应力区。研究结果可为预测区域或矿山压力强度和控制不同区域的岩层行为提供指导。

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来源期刊

Resource Geology 地学-地质学

CiteScore

2.30

自引率

14.30%

发文量

审稿时长

12 months

期刊介绍： Resource Geology is an international journal focusing on economic geology, geochemistry and environmental geology. Its purpose is to contribute to the promotion of earth sciences related to metallic and non-metallic mineral deposits mainly in Asia, Oceania and the Circum-Pacific region, although other parts of the world are also considered. Launched in 1998 by the Society for Resource Geology, the journal is published quarterly in English, making it more accessible to the international geological community. The journal publishes high quality papers of interest to those engaged in research and exploration of mineral deposits.