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中文摘要：
老顶初次来压是一种十分剧烈的矿山压力显现现象,多数情况下,工作面来压最猛烈、最难控制的是老顶的初次来压。初次来压前后,工作面端部底板是破坏深度较大处,对底板存在承压含水层的煤层也是易发生透水的危险地段。应用弹塑性理论进行分析,建立了计算底板最大破坏深度的理论公式,并提出了初次来压时预防底板突水的措施,可供开采受底板承压水威胁的煤层时借鉴。
英文摘要：
The first weighting of the main roof is the very fierce ground behaviour. In many cases, the first weighting is the very fierce and very difficult control pressure of the working face. During the first weighting, coal floor damage depth of the working face end is the relatively large site and the hazardous location that occur water bursting easily. This paper applies elastic-plastic theory to analyse this problem and establish theory equation that can calculate the maximum coal floor damage depth. The measures which prevent the water inrush of coal floor during the first weighting are proposed. It has some reference value to mine coal safely which is menaced by the confined water.
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