基于连采施工工艺巷道掘进空顶距研究

 提出了一种确定空顶距的试验方法，通过对巷道顶板采用特殊的防护方式，保证巷道顶板在短时间、小范围内处于自由状态，在此期间观察顶板表面变形及内部破坏的情况，判断顶板稳定性，从而初步确定合理的掘进空顶距。根据自己设计的防护装置在察哈素煤矿3101工作面胶运顺槽进行了实践。然后通过数值模拟验证一次掘进不同空顶距长度时巷道稳定性，最终得出巷道掘进空顶距合理数据，并已成功运用于察哈素矿。

Study of the Unsupported Roof Distance on Enty Drving with Continuous Miner

One test method of unsupported roof distance determination was proposed, it’s based on using a special support method on the tunnel roof, ensuring the roadway roof on the free state in short time and small range. Observe the changes of surface deformation and roof separation in this short time, evaluation of the roof stability, and preliminary ascertainment of the reasonable unsupported roof distance attend on the above point of view. Then combining with protective devices designed ourselves practice to haulage gate in NO.3101 working –face on Cha Hasu coal mine, verifying the roof stability while driving the roadway on different unsupported roof distance on numerical simulation, finally determining the reasonable unsupported roof distance, and has been successfully applied to the Cha Hasu coal mine.