为了对近距离煤层群上行开采的可行性进行判别,以开滦矿区近20年来上行开采实例为基础,确定了上行开采可行性的评价指标并对其进行了定量化,其中将下煤层开采后对上煤层的破坏程度分为5个等级,破坏等级越高,则上行开采越困难。在此基础上利用多元回归分析方法,以直接顶初次垮落步距、时间间隔、采动影响系数为自变量,以上煤层破坏程度为因变量,建立了近距离煤层群上行开采可行性判据。结果表明,采动影响系数越大、上下煤层开采间隔的时间越长,对上部煤层的开采就越有利。

In order to adjudge the feasibility of the upward mining in the seam group with a short distance to each other, base on the about 20 years upward mining cases, the evaluation index of the upward mining was set up and was quantified.When the mining operation in the lower seam completed, the failure degrees affected to the up seam were divided into five grades.The higher of the failure grade, the more difficult the upward mining would be. Base on the circumstances, taking the initial fall ing step distance of the direct roof, the time interval and the mining influence coefficient as the independent variable and taking the failure degree of the up seam as the dependent variable, the adjudgement of upward mining feasibility in the seam group with a short distance to each other was established.The results showed that the hig her of the mining influence coefficient, the longer the time interval between the up seam mining and the low seam mining would be favorable to the up seam mining.

辽宁省教育厅科技研究资助项目(2009S047)；