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为研究煤层底板陷落柱的突水过程以及陷落柱发育高度、底板岩层强度以及含水层水压3因素对底板陷落柱突水的影响,运用基于有限元的数值分析方法模拟了陷落柱活化及底板裂隙扩展和贯通形成突水通道的全过程,通过对应力场和损伤场的解读,突水通道形成的时空标定在模拟中得到了初步实现,3因素对陷落柱突水的影响在结果中的规律性显现得到了详细分析;另基于开滦范各庄2171采面工程实例,建立模型分析了其突水原因,结果显示高水压下陷落柱发生了活化,高压水流经由陷落柱在-390 m高程劈入煤岩形成突水通道引发了水害。
In order to study the process of water inrush of coal floor and the influence of the height of subsidence column, the strength of floor rock and the hydraulic pressure of aquifer on the water inrush of floor subsidence column, numerical simulation method based on finite element method was used to simulate the activation of subsidence column and floor Crack expansion and penetration through the formation of water inrush channel through the whole process, through the interpretation of the stress field and the damage field, the formation of water inrush channel space-time calibration in the simulation has been initially achieved, the impact of 3 factors on the water column collapse water in the results Based on the example of 2171 coal mining face of Fangezhuang in Kailuan, a model was established to analyze the causes of water inrush. The results showed that the collapse column activated at high water pressure, and the high pressure water flow through the collapse column at -390 m elevation split into coal and rock formation water inrush channel caused water damage.