吕家坨井田矿压显现区域预测

Regional forecast of mine pressure emergence in lvjiatou mine

以地质动力区划方法为基础,划分出各级活动断裂,以吕家坨矿区五级断裂图为构造格架,建立有限元的地质力学模型,以吕家坨矿地应力测量的基础数据为边界条件,通过岩体应力状态分析系统进行应力计算,计算的结果以等值线的方式给出,包括最大主应力等值线、最小主应力等值线、最大剪应力等值线。通过对等值线的分析,预测出矿区的应力升高区、梯度区、降低区,从而对吕家坨矿压显现严重的区域做出预测,为吕家坨井田工作面的生产和采区巷道的合理布置提供基础数据,保证矿井安全生产。

The different levels of active faults are divided with the geo-dynamic division method. The geodynamic model of finite element was founded on the fifth level of active faults, the tectonic skeleton. Based on the fundamental data of in-situ stress measurement as the boundary conditions, the rock mass stress analysis system is used to calculate the stress distribution. The results are isolines, including the maximum principle stress isoline, the minimum principle stress isoline, and the maximum shear stress isoline. Through analysis of isoline, the stress-increase zoning, the stress gradient zones, and the stress-falling zones are predicted. Furthermore, the regions severe of mine pressure emergence were also predicted.