铁法煤田沉陷灾害分区研究

Dividing district study on subsidence disasters in Tiefa coal field

针对铁法煤田因采矿引发的地面沉降和地面塌陷两种地质沉陷灾害进行研究,认为采法、采区、采深、采高、顶板管理是影响沉陷灾害的直接因素：岩性、构造、水文地质条件及矿坑降水是影响沉陷灾害的间接因素,其中矿坑降水是不可忽视的重要因素。根据地表沉降值、水平移动、倾斜、曲率现状值和预测值对沉陷区的建设场地进行危险性分级和分区,将铁法煤田沉陷区分为灾害危险性大区、危险性中等区和危险性小区,并提出了避让和治理措施,为沉陷区治理和沉陷区村屯规划提供决策依据。

In view of two geologic disasters of land subsidence and collapse caused by mining in Tiefa coal field,t he conclusions have been drawn.Mining method,mining area,depth,height and roof management are direct factors of influencing subsidence disasters;rock nature,constructer,hydrogeological condition and mining pit precipitation are indirect factors,and the last one is an important factor.According to subsidence value,horizontal movement,incline actual and prognostic curvature,Tiefa coal field is divided into three grades:large,middle and small,dodging and administration measures are proposed,and references are given for subsidence area's management and prevention