大倾角“三软”煤层工作面老顶来压的预测预报

Prediction of weighting of main roof Of coal face insoft roof- coal-floor coal seam with large dip angle

本文以淮北童亭矿７１１工作面实测风巷支柱载荷变化规律、支柱载荷流程图和顶底板移近速度变化做为老顶来压早期预报的依据，以工作面“三量”变化规律做为老顶来压的临期预报依据，实现了大倾角“三软”煤层工作面老顶来压的预测预报，保证了高难度工作面的安全开采，致使观测期间未发生过一次冒顶和轻伤事故，取得了较好的效果。

In air entry of 711 coal face of Tongting Coal Mine,Hualbai,taking the prop loading law,prop loadingflowsheet and the velocity of roof-to-floor convergenceas the basis of early predicting the weighting of main roof,and taking the″3-quantity″of coal face as the basis ofclosely predicting the weighting of main roof,the prediction of weighting of main roof of coal face in softroof-coal-floor coal seam with large dip angle has beenrealized,ensuring safe in mining at high difficult coalface , no caving and accident occurring during theobservation.and better effect obtained.