大水矿区底板采动“两带”实测方法研究

Research on Measurement of Mining Effect on Floor "Two Zones" in Abundant Underground Water Mining Area

依据底板采动"两带"不同工程特征,提出底板采动"两带"深度的确定方法,即利用底板钻孔注水法或底板钻孔视电阻率变化法测定底板导水破坏带;采用微震监测技术测定力学损伤带。通过在赵固二矿11050工作面运用底板钻孔视电阻率变化法,实测了底板导水破坏带的深度;在赵固一矿16001运用微震监测技术发现了力学损伤带受到采动破坏和底板高水压破坏的形态,具备关键含水层上部能量分布相对于下部更为密集的特点。研讨了底板采动"两带"的划分在大水矿区底板承压水害防治中应用的工程意义。底板采动"两带"划分的研究成果对于大水矿区矿井底板水害治理工程优化具有指导性作用。

Based on the different engineering characters of the "two zones" in mining floor, putting forward the determination methods of the "two zones" depth, that is, applying the water injection method or floor drilling with the direct current electric method to determine the bottom broken zone with water diversion, and applying the micro-seismic monitoring to determine the mechanical damaged zone with additional interstitial flow. Whereafter conducting the project of determining "two zones" form in 11050 working face in Zhaoguer mine and 16001 working face in Zhaoguyi mine, identifying the character of the mechanical damaged zone, which the energy distribution in the upper part of the key aquifer is denser than that in the lower part. Discussing on the application of mining floor "two zones" in prevention of confined water flood. The research results have guiding significance for the optimization of mine floor water prevention project.