中文摘要：

为了准确划分许疃矿顶板“两带”的高度，基于现场监测和数值模拟的方法，采用FLAC3D软件，研究了3234工作面上覆煤岩层裂隙发育规律，并通过现场实测和规程计算对数值模拟分析结果进行了验证。研究结果表明：规程计算、现场实测和数值模拟得出的冒落带高度分别为8.3m，8-8.5m，8.1m，裂隙带高度分别为39.3m，32.5m，29-32.1m；上覆岩层呈现典型的“凸”型破坏特征；现场监测、规程计算与数值模拟的顶板“两带”发育高度基本吻合。

英文摘要：

In order to measure the height of roof ‘two belts’ in Xutuan mine, the author studied the fracture development law in overlying strata of 3234 working face by adopting FLAC3D software based on site monitoring and numerical simulation. The simulation results were verified by site measurement and regulation calculation. The result showed that the height of caving zone is 8.3m,8-8.5m,8.1m respectively measured by regulation calculation, practical measurement and numerical simulation. At the same time, the height of fracturation zone is 39.3m,32.5m,29-32.1m, respectively. The overlying strata showed a typical convex characteristics. The results of site measurement, regulation calculation and numerical simulation were basically matched with the development height of roof ‘two belts’.