Porosity zoning characteristics of fault floor under fluid-solid coupling
Porosity zoning characteristics of fault floor under fluid-solid coupling
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流固耦合下断层孔隙度分带特征
DOI：
10.1007/s10064-019-01701-0
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发表时间：
2020-01
影响因子：
4.2
通讯作者：
Guo Weijia
中科院分区：
文献类型：
--
作者：
Zhao Jinhai;Zhang Xinguo;Jiang Ning;Yin Liming;Guo Weijia
在接近断层构造的开采过程中，由于采动应力的影响，断层带内及断层与煤柱之间的岩体容易发生破坏和活化，是研究和保护的重点部位。断层的动力响应与岩石的破坏过程密切相关，采动应力变化的影响也会导致底板力学性质的差异性分布，最终影响底板的破坏和承压水的突出过程。为了定量分析采动压力对煤层开采过程中底板孔隙度变化和水压分布的影响，研究了采动扰动和承压水压力作用下岩石材料弹性模量、孔隙度、渗透率等力学参数的变化特征。对不同采距条件下不同深度底板水压力及应力分布进行了相似材料模拟研究。结果表明，煤层底板岩体的能量耗散与孔隙度的变化密切相关。同时，建立了不均匀水压力作用下岩体孔隙度的变化规律和底板孔隙水压力的划分与分布模型。在断层附近开采时，下隔水层断层带上下边界同时释放能量的时空位置对突水的发生至关重要。
During exploitation approaching to faults structure, due to the influence of mining stress, the rock mass inside the fault zone and between the fault and the coal pillar is prone to damage and activate, so it is the key research and protection position. The dynamic response of faults is closely related to the failure process of rocks, and the influence of the change in mining-induced stress will also result in the differential distribution of the mechanical properties of floor, and ultimately affects the failure of floor and the outburst process of the confined water. In order to quantitatively analyze the influence of mining pressure on the porosity change of floor and water pressure distribution in coal seam mining process, the change characteristics of rock material mechanics parameters such as Young’s modulus, porosity, and permeability under the action of mining disturbance and confined water pressure were studied. A similar material simulation study on the water pressure and stress distribution of floor at different depths under different mining distance conditions was carried out. According to the results, the energy dissipation of coal floor rock mass is closely related to the change of porosity. Meanwhile, the changes in the porosity of rock mass under the action of uneven water pressure and the partition and distribution model of pore water pressure of the floor were established. When mining is carried out near the faults, the spatiotemporal position when and where the upper and lower boundaries of the fault zone in the lower water-resisting layer release energy at the same time is critical to the occurrence of water inrush.
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影响因子：
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作者：
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DOI：
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