综掘巷道超前支护装置及其应用研究

为了解决巷道掘进面事故频发，超前支护越来越得到重视，而传统的临时超前支护方式存在诸多弊端，如支撑力不足，支护面积小，作业耗时长、工人劳动强度大、作业安全无保障，已不能适应当前巷道围岩变形特点，本研究将应用新研制的超前支护装置，结合现场工业性试验以及FLAC数值模拟进行验证。结果表明，该新型超前支护装置结构设计合理可靠，易操作，对于提高巷道开挖后第三向应力水平具有积极的作用，并且该装置可以实现在巷道开挖后“无支护-临时超前支护”等工艺过程的无缝衔接过渡，显著地提高了采煤正规循环率，同时应用该装置的工作面，不仅增强了工人的安全感，也提高了工作效率。超前支护装置在王庄煤矿应用的整个工业性试验期内取得了很好的支护效果与经济效益，完全可以满足安全生产的需要。

Forepoling Device for Fully Mechanized Roadway Heading and Its Application

In order to fully avoid the accidents in mechanized work face,more and more attention is paid on the forepoling.However,the traditional temporary forepoling has many disadvantages,such as lack of the support force,less support area,longer operating time,higher labor intensity and lower security.It does not adapt to the characteristics of surrounding rock deformation.The newly-developed advanced forepoling is applied to make verification,combining the on-site industrial tests and the FLAC numerical simulation.The results show that the new forepoling device has a feature of reasonable support structure,and easy operation.It has a positive effect on improving the stress level in third direction after excavation,and can be used to make a perfect process transition from no support to temporary forepoling in the tunnel excavation and improve the normal recycling rate of the mining.In addition,the application of forepoling in the working face improves the environment security,and also increases the working efficiency.A good supporting effect and economic benefit has been achieved by applying this forepoling in Wangzhuang Coal Mine in a whole industrial test.So the forepoling can completely meet the needs of safe production.