不同采矿条件采煤对地表移动变形规律的影响

Mining Coal in the different Mining Conditions influence the Law of Surface Movement Deformation

水下煤层安全开采对于煤矿来说是至关重要的,以位于水库下的某煤田为例,运用FLAC3D数值模拟软件,模拟分析3m、4.5m、6m三种不同开采厚度和300m、400m、500m三种不同开采深度对地表移动变形规律的影响,经计算得到地表下沉系数和水平移动系数,分别将其与不同采厚和采深进行数据拟合,结果表明,采厚、采深与地表下沉系数和水平移动系数均呈现幂数关系,随着采厚和采深增加,地表移动变形规律分别呈现缓慢增加和减小趋势。经计算知水库下煤田可以进行正常开采,不会对水库的安全造成威胁。

It is crucial to mine underwater seam for coal mine, taking reservoir in a coalfield as an example, using FLAC3D numerical simulation software, simulating and analysing three different mining thickness such as 3 m, 4.5 m, 6 m and three different mining depth such as 300 m, 400 m and 500 m to influence surface movement deformation law, the effect of the coefficient of surface subsidence and horizontal movement coefficient is calculated, with different thickness and fitting method for data mining depth, the results show that the mining thick, mining depth and coefficient of surface subsidence and horizontal movement coefficients appear exponential relationship, with mining thick and mining depth increasing, the surface movement deformation law showed a trend of slow increase and decrease respect respectively. By calculating, coalfield under reservoir can be mined normally, which will not threaten the safety of the reservoir.