准确掌握承压含水层上煤层采动底板岩层变形破坏动态发育规律，是矿井安全高效生产的基础。采用理论分析、井下原位实测等综合技术手段对上分层煤层开采底板变形破坏机制进行了深入探讨与分析。传统力学计算结果表明，3#煤层上分层采动后，底板岩层0 ~ 7.4 m范围内发生脆性断裂，7.4 ~ 12.6 m范围内发生塑性破断。根据工作面回采进度，动态获取不同阶段岩层地电场响应特征，可对底板岩层变形与破坏规律进行全面分析。原位测试结果表明，3#煤层上分层采动期间，工作面超前支承压力影响距离为25.9 m，底板变形破坏深度为12.5 m，破坏区岩层电阻率值为背景值的8 ~ 10倍；同时分布式光纤测试结果与电阻率测试结果高度一致，绝对误差为0.02 m，相对误差为0.16%。实际应用结果表明，钻孔并行电法测试结果清晰，可准确刻画岩层变形破坏形态，有效提升了对岩层内部变形破坏的解译能力。

Accurately grasping the dynamic development law of deformation and failure of the mining floor above the confined aquifer constitutes the fundamental basis for ensuring safe and efficient mine production. Through a combination of theoretical analysis and in-situ measurement, an in-depth exploration and analysis was conducted on the deformation and failure mechanism of the bottom floor during the upper layer coal seam mining. The outcomes of traditional mechanical calculations indicated that after the mining of the upper layer of the 3# coal seam, brittle fractures occur within the range of 0 ~ 7.4 m, while plastic fractures taken place between 7.4 m and 12.6 m. According to the mining progress of the working face, the response characteristics of rock strata at different stages can be dynamically obtained, facilitating a comprehensive analysis of the deformation and failure laws of the floor strata. The in-situ test results reveal that during the strata mining of the 3# coal seam, the influence distance of the leading abutment pressure of the working face reaches 25.9 m, the deformation and failure depth of the floor is measured at 12.5 m, and the resistivity value of the rock layer in the damaged area is approximately 8 ~ 10 times that of the background value. Meanwhile, the distributed optical fiber test results demonstrate a high degree of consistency with the resistivity test results, with an absolute error of merely 0.02 m and a relative error of 0.16%. The practical application results show that the test results of borehole parallel electrical method are clear, which can accurately depict the deformation and failure shape of the rock strata and effectively improve the interpretation ability of the internal deformation and failure of the rock strata.