Numerical Modelling of Mining-induced Inrushes from Subjacent Water Conducting Karst Collapse Columns in Northern China
Numerical Modelling of Mining-induced Inrushes from Subjacent Water Conducting Karst Collapse Columns in Northern China
复制标题
中国北方开采引起的地下水引导岩溶塌陷柱涌水的数值模拟
DOI：
10.1007/s10230-017-0503-z
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发表时间：
2018-12
影响因子：
2.8
通讯作者：
Li ZC
中科院分区：
文献类型：
--
作者：
Liu HL;Li LC;Li ZC
陷落柱是岩溶空洞烟囱冒落形成的地质特征。陷落柱可以切割岩体，并在煤田中引入巨大的地质复杂性。当陷落柱进入承压含水层时，可引发突水灾害。在中国北方，与陷落柱有关的侵入体发生在广泛的奥陶系灰岩下伏的煤系地层中。这种石灰岩被强烈的岩溶作用所覆盖，并含有大量的水。测压表面可以显著高于煤炭开采水平。通过数值模拟方法，对突水通道的形成过程进行了研究。首先，分析了煤层底板应力场、损伤场和渗流场的演化规律。然后考虑了煤柱高度、煤层底板力学强度、含水层水压等因素。在示范模型中，如果陷落柱的高度超过35 m，隔水层的初始厚度小于15 m，即使底板岩层的强度相对较高，也肯定会发生突水。最后，以范各庄煤矿陷落柱突水为例进行了数值模拟。断裂过程的建模提供了对断裂带和涌入过程演变的深入了解，这些过程在现场无法观察到，并且难以使用静态应力分析进行评估。
Collapse columns are geological features formed by chimney caving of karst voids. Collapse columns can cut through the rock mass and introduce vast geological complexity in coalfields. When a collapse column becomes accessible to a confined aquifer, water inrush disasters can be triggered. In northern China, inrushes related to collapse columns occur in regions where extensive Ordovician limestone underlies the coal measures. This limestone is strongly karstified and holds large quantities of water. The piezometric surface can be considerably higher than the coal extraction level. Numerical simulation was used to explore how the water inrush pathway forms, based on a demonstration model. First, the evolution of the stress field, damage field, and flow volume within the coal floor was analysed. Then factors such as the column height, mechanical strength of the coal floor, and hydraulic pressure in the aquifer were considered. In the demonstration models, if the height of the collapse column exceeded 35 m and the initial thickness of the aquiclude was less than 15 m, an inrush definitely occurred, even when the strength of the floor strata was relatively high. Finally, a practical case of water inrush in the Fangezhuang coal mine related to a collapse column was numerically investigated. Modelling of the fracturing process provided insight into evolution of the fracture zone and inrush processes that cannot be observed in the field and are difficult to evaluate using static stress analysis.
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影响因子：
2.8
作者：
Wancheng Zhu;C. Wei
通讯作者：
Wancheng Zhu;C. Wei
影响因子：
4.7
作者：
D. P. Viero;M. Valipour
通讯作者：
D. P. Viero;M. Valipour
DOI：
--
发表时间：
1943
期刊：
Transactions of the American Society of Civil Engineers
影响因子：
--
作者：
K. Terzaghi
通讯作者：
K. Terzaghi
基于 GIS 的贝叶斯网络对中国开滦东环沱煤矿 12-2 煤层突水评估
影响因子：
2.8
作者：
Dong Donglin;Sun Wenjie;Xi Sha
通讯作者：
Xi Sha
DOI：
--
发表时间：
2009
期刊：
Journal of Mining and Safety Engineering
影响因子：
--
作者：
Chen Shi-kuo
通讯作者：
Chen Shi-kuo