岳城煤矿底板三带的破坏深度计算分析

Calculation and Analysis of Destruction Depth of Three Belts in Floor of Yuecheng Coal Mine

为了评价岳城煤矿9#、15#煤层带压开采的情况,对岳城煤矿底板"三带"的破坏高度进行了计算分析,通过对底板应力的分析,按照地基弹性梁理论计算出了底板的破坏深度;通过线性回归对底板采动破坏深度的计算,发现工作面的长度对其影响程度较大,因此为了减小底板的破坏深度需要缩短工作面长度;假设有效隔水带为弹性薄板,计算得出底板的临界突水水压p与隔水高度h2的关系服从二次型函数变换趋势。

In order to evaluate the pressure mining of No.9and No.15coal seams in Yuecheng Coal Mine,this paper calculated and analyzed the damage height of the"three belts"of the floor of Yuecheng Coal Mine.According to the analysis of the stress of the floor and the theory of foundation elastic beam,the depth of damage of the floor is obtained.The calculation of the depth of the floor damage by linear regression showed that the length of the working face has a great influence on it,so it is necessary to reduce the length of the working face in order to reduce the depth of damage of the floor.Assuming an elastic thin plate,the relationship between the water inrush pressure p and the water-blocking height h2is subject to the trend of quadratic function transformation.