以kotlyarevsky煤矿为例,研究了采空区地下水位上升对地表变形的影响

I. Sakhno, S. Sakhno, A. Petrenko, O. Barkova
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引用次数: 0

摘要

目的。长壁采空区矿井水位对破坏地表变形过程激活的影响研究。方法。本研究采用工程法和图解分析法,按规范方法计算位移槽的参数。采用Ansys软件中实现的有限元方法,对矿井水位上升对地表变形的影响进行了研究。该问题在考虑岩石非均质性的弹塑性环境下得到了解决。发现。根据矿区南部的情况,绘制了滑坡槽,并与地面基础设施物构建了沉降等值线平面图。地表物体,其破坏的风险增加,当矿井水位上升,已确定。切割线的位置,这是最危险的位置的特征,被确定。通过对数值试验结果的分析和归纳,确定了Kotlyarevsky矿1煤层南长壁1、2采空区矿井水位上升导致地表滑坡的活化。同时,洪水情况下位移槽的垂直沉降(至有序破坏带的全高度)增加了22.4%,槽的宽度不成比例地增加了1.3%。由于坡度和曲率的增加,这大大增加了地面基础设施物体的危险。独创性在于建立了矿井水位上升时地表破坏区域的地表位移变化特征。实际的含义。研究结果可用于矿井水位上升引发的位移槽内滑坡沉降等因素的预测。同时,可以及时规划和制定一套措施,以保护地面基础设施对象免受破坏的负面影响。关键词:地表位移,地表破坏,滑坡,位移槽,矿井水位上升,地表位移预报
本文章由计算机程序翻译,如有差异,请以英文原文为准。
THE INFLUENCE OF GROUND WATER LEVEL RISE IN GOB OF COAL MINES ON GROUND SURFACE DEFORMATION ON THE EXAMPLE OF THE KOTLYAREVSKY MINE
Purpose. The study of the influence of mine water rising level of longwalls gob on the activation of deformation processes on the undermined earth’s surface. Methods. In the study was used the method of engineering and graphic analysis for calculating the parameters of the displacement trough according to the normative method. The finite element method that was implemented in the Ansys code was used to carry out studies of the influence of mine water rising level on the deformation of the earth’s surface. The problem is solved in an elastic-plastic setting, taking into account the heterogeneity of rocks. Findings. In accordance with the conditions of the southern part of the mine field, a landslide trough was drawn, and a plan of subsidence isolines was constructed with surface infrastructure objects. Surface objects, the risk of destruction of which increases when the mine water level rises, have been identified. The position of the cut line, which characterizes the most dangerous position, is determined. After the analysis and generalization of the results of the numerical experiment, it was established that the rise of mine water level in the gobs of 1th and 2th southern longwall of the coal seam l1 of Kotlyarevsky mine leads to the activation of landslides on the earth’s surface. At the same time, the vertical subsidence in the displacement trough in the case of flooding (to the full height of the zone of ordered destruction) increases by 22.4%, and the width of the trough increases disproportionately – by 1.3%. This contributes to a significant increase in hazards for surface infrastructure objects due to the increase in slopes and curvatures. Originality consists in establishing of the features of changes in surface displacement in the area of undermined earth’s surface due to the rise of mine water level. Practical implication. The results of the study can be used in the prediction of subsidence and other elements of landslides in the displacement trough, which are activated due to the rise of mine water level. At the same time, the possibility of timely planning and development of a set of measures to protect surface infrastructure objects from the negative impact of undermining is ensured. Keywords: earth’s surface displacement, surface undermine, landslides, displacement trough, rise of mine water level, surface displacement forecast.
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