祁东煤矿8₂32工作面导水裂隙带发育高度研究

Study on the Development Height of Water Conducting Fracture Zone in 8₂32 Working Face of Qidong Coal Mine

煤层开采的同时常常伴随很多灾害的发生,本文为了防止开采后产生裂隙贯通上覆水体,导致发生水害,对祁东煤矿8232工作面导水裂隙带发育高度进行预计。运用数值模拟和两种规范经验公式的方法对其导水裂缝带发育高度进行了预测研究,并与实测结果进行比较。通过研究得出:不考虑顶板预裂时,8232工作面采动覆岩导水裂隙带高度预计值为64.13 m;考虑顶板预裂时,8232工作面采动覆岩导水裂隙带高度预计值为55.27 m。相同条件下数值模拟结果比经验公式结果更接近实际。

Coal seam mining is often accompanied by many disasters. In order to prevent cracks from penetrating the overlying water body and causing water damage after mining, this paper predicts the development height of water diversion fracture zone in 8232 working face of Qidong Coal Mine. The development height of water conducting fracture zone is predicted by using numerical simulation and two normative empirical formulas, and compared with the measured results. Through the research, it is concluded that when the roof pre crack is not considered, the estimated height of the mining overburden water diversion fracture zone in 8232 working face is 64.13 m;When considering the pre splitting of the roof, the height of the mining overburden water diversion fracture zone in 8232 working face is expected to be 55.27 m. Under the same conditions, the numerical simulation results are closer to the reality than the empirical formula results.