导水裂缝带发育规律动态监测研究

Research on the dynamic monitoring about the development rule of water conducted zone

煤层采出后,上覆岩层要发生破坏和位移,并具有明显的分带性,通常呈现垮落带、裂缝带以及弯曲下沉带。确定煤层顶板导水裂缝带高度可为顶板防治水、采掘工程布置、防水煤柱留设以及瓦斯抽采设计提供依据。由于开采技术的不断更新以及地质条件的差异,导致导水裂缝实际发育高度在不同矿区有较大变化,有些矿区的导水裂缝发育高度与规程中的预测公式的计算结果并不完全相符,因此需要对其进行现场实测确定实际发育高度。本文通过对荆各庄矿1196F回采工作面工作面布置导水裂缝带监测系统,浏览导水裂缝带发育过程、形态特征及导水裂缝带高度,现场监测显示其导水裂缝带最终发育高度为28~32m。

After coal extraction,its overlying strata will be damaged and displacement,and has obvious zonality,usually presents caving zone,fractured zone and bend zone.Determining the height of water flowing fracture zone would provide the basis for the prevention and control of roof water,mining engineering layout,waterproof pillar design,and gas extraction.As a result of the constantly updating mining technology,and the difference of geological conditions,the height of water flowing fractured zone in different mining areas changes a lot,and does not completely match with the calculation results of prediction formula in some mining areas,so it is necessary to do field measurement to determine the actual height.Through the layout of water flowing fracture zone monitoring system in Jinggezhuang mine 1196 F working face,and the browse of its development process,the morphological characteristics and maximum height,site monitoring shows that the water flowing fractured zone finally develops 28 ~ 32 m in height.