煤层在开采之前,它同岩层在各个方向受力是平衡的,掘出开切眼后,岩层受力平衡状态遭到破坏,围岩移动变形,寻求新的应力平衡,在顶板上方形成了暂时平衡的岩石松动圈,这时工作面支架主要支撑的是松动圈内岩石重量。由于进行采掘活动而在巷道及回采工作面周围岩体中,以及在支架上所引起的力,叫做顶板来压。
利用人工神经元网络对工作面的顶板来压步距进行了预测。
The intervals of main roof weighting at work faces were predicted by using artificial neural network.
通过现场实测,得出了对浅埋煤层高产高效工作面顶板来压特征和不同推进速度的矿压显现规律。
The field investigations show that ground pressure of coal face with high productivity depends on face advance rate.
说明在月亮田煤矿的具体条件下,所用的分析方法是合理的,对其他采场的顶板来压的预测也具有参考价值。
And calculations of the stress of the roof rock are made with numerical value analytic method. The conclusions tally with what are determinde in practice.
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