采煤塌陷区土地动态沉降预测模型  

Prediction model of land dynamic settlement in coal mining subsidence area

作　　者：张子月[1] 邹友峰[1] 陈俊杰[1] 王云广[2] 

机构地区：[1]河南理工大学测绘与国土信息工程学院,焦作454003 [2]河南理工大学能源科学与工程学院,焦作454003

出　　处：《农业工程学报》2016年第21期246-251,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金联合基金项目(U1261206)

摘　　要：为了把握采煤塌陷区土地复垦的时机、促进农业生产的持续高效,对塌陷区土地随时间不断变化的动态沉降过程进行了研究。通过分析Knothe函数中时间影响参数c,得出c值对地表沉降的动态计算及稳定时间有较大影响,且参数c是动态变化的,给出了c值的计算方法。依据塌陷区极限下沉量和阶段下沉量的思想,建立了基于时间影响参数的塌陷区动态沉降预测模型,并以某矿2407工作面的地表沉陷实测数据为例,对参数c的求取和预测模型进行了实例应用,结果表明该动态沉降预测模型较为符合现场实际。The surface of the coal mining subsidence area will continue to sink at a relatively slow speed until it reaches limit, and the continuous settlement will inevitably affect the choice of land reclamation time, the growing crops which need nutrients from the land, and the normal use of agricultural facilities. It is very necessary to study the dynamic settlement of land over time to guarantee the time of land reclamation and the effectiveness of agricultural production. Time effect parameter in the Knothe function was analyzed in this study, and found that the parameter value had a great influence on the dynamic calculation of the surface subsidence and stability time. In the short period after mining, the bigger the parameter was, the greater the surface subsidence, and vice versa. And the bigger the parameter, the shorter the time needed for the surface from starting sinking to reaching the stability, and vice versa. In fact, the parameter was changing over time; the parameter in different periods were obtained based on the surface dynamic subsidence and time firstly, then the values were fitted, and the parameter in any period could be obtained according to the fitted formula. The dynamic settlement of coal mining subsidence area was closely related to the time; the Knothe function was introduced into the probability integral model, and the new idea of the ultimate subsidence and stage subsidence in the coal mining subsidence area was proposed. The prediction model of land dynamic settlement in coal mining subsidence area was constructed based on the Knothe function, which could be used to calculate the stage subsidence value at any time according to the engineering requirements. The subsidence factor, which changed with the time and was obtained from the time effect parameter, was the most important parameter in the prediction model. In order to verify the reliability and practicability of the prediction model, the paper took the measured surface subsidence data from the 2407 working face as an example, and ca

关 键 词：煤矿 土地复垦 模型 塌陷区 动态沉降 时间影响参数 农业生产 

分 类 号：TD327[矿业工程—矿井建设] S281[农业科学—农业水土工程]