Knothe时间函数参数影响分析及其求参模型研究

Impact of parameter on Knothe time function and its calculation model

对Knothe时间函数参数的影响进行了分析,在Knothe时间函数未达到收敛以前,对于同一时间点而言,c值越小,Knothe时间函数值也越小,c值越大,Knothe时间函数取值也相对越大,特别是在t∈[0,0.2]时,不同的参数对Knothe时间函数值影响较大。根据开采沉陷地表移动变形的一般规律和采空区达到充分采动时的尺寸,建立了一种新的Knothe时间函数求参模型——概率积分求参法。通过对比分析平安煤矿、富力煤矿和孙村煤矿的实测c值与采用该模型的计算c值,验证了该模型的正确性;并以29401工作面上方走向观测线的多期实测下沉数据为例,对该模型进行了实例应用,通过对比分析实测数据和预测结果,进一步证实了本文所建立的Knothe时间函数求参模型的实用性和可靠性。

Based on the analysis of the influence of the Knothe time function parameter, This paper puts forward that before the Knothe time function is convergent, for the same point in time, the smaller the value of c becomes, the smaller the Knothe time function value becomes, and vice versa. The influence of the different parameter on the Knothe time function value is very significant, especially when t∈[0,0.2]. According to the general laws of surface subsidence and the size at which the gob reached the full extraction, a new evaluation parameter model of Knothe time function （named the probability integral calculate the parameter method） was established. By comparing the measured c value and the calculated c value of the model of Pingan coal mine, Fuli coal mine and Suncun coal mine, the correctness of the model is verified. By applying the model to several observational subsidence data of the strike line of the 29401 face, and comparing the measured data and predictions, the practicality and reliability of the Knothe time function parameter calculation model is established in this paper.