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中文摘要：
为了研究李家壕近距离煤层群同采时上煤层开采对下煤层开采矿压显现规律的影响,通过理论计算和地质雷达实测得出上煤层开采对底板的破坏深度约为20m,利用UDEC离散元数值模拟软件对煤层间距变化时下煤层矿压影响做出了分析,并现场对下煤层12108工作面的矿压进行了监测,结果表明：煤层间距在25~30m时,上煤层开采会对下煤层的矿压产生影响,造成下煤层顶板下沉量变大,来压步距减小等。
英文摘要：
In order to study the influence of upper coal seam mining on mine pressure behavior of lower coal seam,in close coal seam of Lijiahao Mine,theoretical calculation and geological radar measurement were conducted,obtaining the floor damage depth caused by upper coal seam mining was about 20 m. The mine pressure variation of lower coal seam,caused by coal seam distance change,was studied with UDEC software. And the mine pressure of 12108 working face was monitored,the results show that,with coal seam distance at 25 ~ 30 m,the upper coal seam mining will affect the mine pressure of lower coal seam,increasing the subsidence of lower coal seam roof,decreasing the pressure step.
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