近距离煤层重复采动上覆岩层“两带”高度的探测

Close Distance Coal Seam of Repeated Mining Exploration Moves Overburden Height "Two Belts"

矿井五采区开采下组煤14#、15#、16#煤层，其上部2#、6#煤层已开采，采空区面积大，采空区内有积水。通过在15#煤层工作面开采前后施工钻孔，进行现场探测，总结出下组煤14#、15#煤层重复采动上覆岩层“两带”发育高度，即14#煤、15#煤叠加垮落带高度为15．86～16．06m，叠加导水裂缝带高度为57．45～57．56m，为下组煤开采防治上部采空区积水，提供了依据，保证了工作面安全开采。

Five mining area mining lower coal group 14#,15#,16# coal seam, the upper 2#,6# coal seam min- ing, mined out area is large with water, through field exploration 15#coal seam working face mining and drill- ing, summed up the lower coal group 14#, 15# coal repeated mining overlying strata ＂two belts＂ development al- titude 14# coal, 15# coal stack of caving zone height 15.86 to 16.06m, superimposed pilot water fractured zone height of 57.45 - 57.56m. In order to provide the basis for the prevention and control of water in the upper part of the coal mining area, the safe mining of the working face is ensured.