摘要
平煤十矿是典型褶皱构造矿井,为研究煤与瓦斯突出主控因素,利用瓦斯地质理论和煤岩动力学的方法,分析了各组煤层突出规律,论述了褶皱、煤层厚度、煤层倾角、构造煤、地应力等地质因素对突出的控制作用。结果表明,褶皱和地应力是主控因素。最后对未采区的突出危险性进行了分区预测。
This paper is aimed at investigating the main controlling factors of coal and gas outbursts due to the fold tectonic structure. For our study purpose, we have chosen No. 10 coal-mine, Pingdingshan, Henan, as our ease study sample, for the mine is typically character- istic of the folding structure. Coming from the need of our study, we have first of all analyzed the regional regularities of the likely out- bursts of the coal seam in this area via the study of the coal and rock dynamic features and the gas geological theory. And, the next, we have looked through the geologic-tectonic evolution of the dynamic movement in the folder formulation process, with particular stress on the variations of coal thickness, slanting angle of the coal seams, the tectonic coal thickness in different areas under the strong effects of geological rheology. What＇s more, our analysis has also been turned onto the in-situ stress influence based on the geologic-tectonic evolu- tion. The results of our study show that the folds and in-situ stresses should be the chief factors influencing the coming-up of the coal-seam outbursts. A typical coal mine in this way is the northeast wing of Guozhuang anticline, whose stress is the most concentrated area from the kinetic point of view. Through our analysis, we have found that the coal seam of group B mines tends to be controlled not only by the folds but also by in-situ stress. The latter seems likely to play a sig- nificant role in the vertical direction of the Guozhuang anticline. Fur- thermore, the in-situ stress may originate from the residual tectonic stress and modem tectonic stress of fold formation process. Therefore, it can be thought to reflect the control effects of the fold structure. And, finally, the outburst risk of not-yet mining areas can be pre- dicted via the above theory. For example, Guozhuang anticline be- longs to such a nasal-type structure, the ridge of whose eastern part turns to be higher than the western one, and therefore, is likely to be subject to higher outburst risks than its eastern part. In comparison with Guozhuang anticline, LIKOU syneline tends to increase in- evitably its attribution to gas and in-situ stress matching in its deep part.
出处
《安全与环境学报》
CAS
CSCD
北大核心
2013年第5期202-206,共5页
Journal of Safety and Environment
基金
国家"十二五"科技重大专项课题(2011ZX05040-005)
关键词
安全工程
煤与瓦斯突出
褶皱构造
地应力
控制作用
safety engineering
coal and gas outburst
folds
in-situ stress
control effect
