王引河下采煤堤坝移动与变形规律研究
发布时间：2018-08-01 10:34
【摘要】：随着我国经济的快速增长,对煤矿资源需求日益提高,导致"水体下采煤"活动加剧。"水体下采煤"势必会对河堤造成影响,给人民的生命财产安全带来巨大的隐患。因此,必须在煤矿开采前对河堤受到的影响程度及范围进行科学合理的预测,为堤坝修复提供技术支持。本文以王引河下刘桥一矿663工作面采煤为例,根据该工作面的地质采矿和概率积分法预计参数,利用VB编程语言建立概率积分预测模型;根据该工作面地质采矿和岩体力学参数,基于FISH编程语言建立FLAC3D预测模型。用这两种预测模型对王引河下采煤的河堤移动与变形进行预测、分析,研究其规律。本文将两种预测模型的预测结果与王引河北堤移动观测站观测数据进行对比分析。分析结果表明:在河堤移动与变形预测方面,概率积分法和FLAC3D数值模拟分析法都是可行的;王引河北堤受到了 633工作面开采影响,南堤未受到影响;就整体下沉而言,概率积分预测模型优于FLAC3D预测模型;就水平移动而言,FLAC3D预测模型的预测效果优于概率积分法预测模型。两种预测模型的水平变形预测结果表明:在663工作面的开采影响下,王引河北堤出现裂缝的概率较小。本文利用FLAC3D数值模拟并结合后处理软件(Tecplot360),从拉应力和剪应力两个方面分析了王引河北堤受663工作面开采影响的受力情况。拉应力分析结果表明:北堤背水坡拉应力较为集中,最大拉应力没有达到堤体出现裂缝的拉应力临界值,北堤产生横向裂缝的概率较小;剪应力分析结果表明:王引河北堤堤体fs均大于0,根据剪切破坏准侧,北堤不会出现剪切破坏。研究结果对具有相似地质采矿条件下的河下采煤具有一定的指导意义。
[Abstract]:With the rapid economic growth of our country, the demand for coal resources is increasing day by day, which leads to the intensification of "coal mining under water body". Mining under water is bound to affect river embankment and bring great hidden danger to people's life and property safety. Therefore, it is necessary to make scientific and reasonable prediction of the influence degree and scope of river embankment before coal mining, to provide technical support for the restoration of embankment. In this paper, taking 663 coal mining face of Wangyin River Xialiuqiao No. 1 Mine as an example, the probability integral prediction model is established by VB programming language according to the prediction parameters of geological mining and probability integration method of the working face. According to the geological mining and rock mechanics parameters of the working face, the FLAC3D prediction model is established based on FISH programming language. The two prediction models are used to predict the movement and deformation of the river embankment of coal mining under the Wangyin River. In this paper, the prediction results of the two kinds of prediction models are compared with the observation data of Wang Yindi moving observation Station in Hebei Province. The results show that the probabilistic integration method and FLAC3D numerical simulation method are feasible in predicting the movement and deformation of the river embankment, the Wangyin Hebei embankment is affected by 633 face mining, the south embankment is not affected, and as far as the whole subsidence is concerned, The probabilistic integral prediction model is superior to the FLAC3D model, and the FLAC3D prediction model is superior to the probabilistic integration model in terms of horizontal movement. The results of horizontal deformation prediction of two kinds of prediction models show that under the influence of 663 face mining, the probability of cracks appearing in the embankment of Wangyin Hebei is relatively small. Based on the FLAC3D numerical simulation and post-processing software (Tecplot360), this paper analyzes the influence of mining on the Wang-Yin-Hebei embankment from the two aspects of tensile stress and shear stress. The results of tensile stress analysis show that the tensile stress on the back slope of the north embankment is relatively concentrated, the maximum tensile stress does not reach the critical value of tensile stress of the dike body, and the probability of transverse crack in the north embankment is relatively small. The results of shear stress analysis show that the body fs of the embankment of Wangyin Hebei is greater than 0. According to the quasi-side of shear failure, there will be no shear failure in the north embankment. The research results have certain guiding significance for mining coal under similar geological and mining conditions.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TV871;TD325
本文编号：2157293
[Abstract]:With the rapid economic growth of our country, the demand for coal resources is increasing day by day, which leads to the intensification of "coal mining under water body". Mining under water is bound to affect river embankment and bring great hidden danger to people's life and property safety. Therefore, it is necessary to make scientific and reasonable prediction of the influence degree and scope of river embankment before coal mining, to provide technical support for the restoration of embankment. In this paper, taking 663 coal mining face of Wangyin River Xialiuqiao No. 1 Mine as an example, the probability integral prediction model is established by VB programming language according to the prediction parameters of geological mining and probability integration method of the working face. According to the geological mining and rock mechanics parameters of the working face, the FLAC3D prediction model is established based on FISH programming language. The two prediction models are used to predict the movement and deformation of the river embankment of coal mining under the Wangyin River. In this paper, the prediction results of the two kinds of prediction models are compared with the observation data of Wang Yindi moving observation Station in Hebei Province. The results show that the probabilistic integration method and FLAC3D numerical simulation method are feasible in predicting the movement and deformation of the river embankment, the Wangyin Hebei embankment is affected by 633 face mining, the south embankment is not affected, and as far as the whole subsidence is concerned, The probabilistic integral prediction model is superior to the FLAC3D model, and the FLAC3D prediction model is superior to the probabilistic integration model in terms of horizontal movement. The results of horizontal deformation prediction of two kinds of prediction models show that under the influence of 663 face mining, the probability of cracks appearing in the embankment of Wangyin Hebei is relatively small. Based on the FLAC3D numerical simulation and post-processing software (Tecplot360), this paper analyzes the influence of mining on the Wang-Yin-Hebei embankment from the two aspects of tensile stress and shear stress. The results of tensile stress analysis show that the tensile stress on the back slope of the north embankment is relatively concentrated, the maximum tensile stress does not reach the critical value of tensile stress of the dike body, and the probability of transverse crack in the north embankment is relatively small. The results of shear stress analysis show that the body fs of the embankment of Wangyin Hebei is greater than 0. According to the quasi-side of shear failure, there will be no shear failure in the north embankment. The research results have certain guiding significance for mining coal under similar geological and mining conditions.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TV871;TD325
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1 张磊;王引河下采煤堤坝移动与变形规律研究[D];安徽理工大学;2017年
，本文编号：2157293
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