浅埋煤层非充分采动地表移动规律实测研究

Field Measurement Study on Movement Law of Insufficient Mining Movement Surface Ground Above Shallow Depth Seam

浅埋煤层非充分采动与充分采动所引起的地表移动规律有所不同,文章以柠条塔煤矿S1210工作面为例,对浅埋煤层非充分采动地表的移动规律进行了实测研究,结果表明:和充分采动地表沉降相比,非充分采动引起的地表沉降在经历启动阶段、活跃阶段和衰退阶段之前先经历稳定阶段和突变阶段。基于概率密度函数法,编制MATLAB非线性拟合程序,应用实测数据对预计公式进行拟合,拟合结果与实际情况吻合良好。根据拟合的预计公式,反求取了S1210地表移动的主要参数,参数符合实际。

A surface ground movement law caused by the insufficient mining movement of a shallow depth seam or the sufficient mining movement of a shallow depth seam would be different. Based on No. S1210 coal mining face in Ningtiaota Mine as a case, the paper had a field measurement study on the movement law of the insufficient mining movement surface ground above the shallow depth. In comparison with the subsidence of the sufficient mining movement surface ground, the results showed that a stable stage and a sudden change stage would be occurred before the surface ground subsidence caused by the insufficient mining movement would have a initial stage, active stage and declined stage. Based on the probability density function method, a MATLAB nonlinear fitting program was prepared, the site measured data were applied to the fitting of the prediction formula and the fitting results and actual condition were well fitted. According to the fitting prediction formula, the major parameters of the surface ground movement above No. S1210 coal mining face could be obtained reversely and the parameters could fit the actual condition.