The intervals of main roof weighting at work faces were predicted by using artificial neural network.
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 loci of plastic hinge line and the maximum load during first roof weighting are determined by using kinematical method, and the minimum span of roof key stratum is derived.
利用机动法确定了老顶岩板初次来压时载荷的上限值和塑铰线的位置，得到了顶板岩体关键层的最小破断跨距。
Based on the study of mechanism of roof weighting in coal face, a expert system for forecasting pattern, inferring strategy, monitoring method and data processing method are established.
通过对采场来压预测预报机理的深入研究，建立了基于预报模式、推理策略、监测方法及数据处理方法的采场来压预测预报专家系统。
The method of determining the index for predicting local roof fall has been given, the possibility of using a comprehensive index for roof weighting prediction has been discussed in detail.
初步给出了局部冒顶监报指标的确定方法；重点探索了采用回采工作面来压综合判断指标来预报顶板来压的可能性。
The increase in mining height makes the weighting of immediate roof become more violently, which requires that the support strength should increase accordingly.
由于采高加大使基本顶来压更加强烈，支架的支护强度更要加大。
By contrasting with weighting observation data, the conclusion that roof strata have large-small structures is demonstrated.
并通过现场矿压观测资料，从理论上论证了顶板岩层中存在的结构体实质上包括“大、小结构”两个部分。
By field observation and simulating test of shallow seam longwall mining, the phenomenon of main roof asymmetry breaking is discovered during the first weighting.
依据典型浅埋煤层工作面的实测和模拟，发现了采场老顶初次破断的非对称现象。
Increased hanging area and weighting of main roof caused abutment stress concentration and stress transfer.
由于悬露面积增大或老顶来压引起支承压力集中和转移。
Increased hanging area and weighting of main roof caused abutment stress concentration and stress transfer.
由于悬露面积增大或老顶来压引起支承压力集中和转移。
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