放炮落顶在综放工作面初采中的应用

Discussion on the Application of Roof Caving through Blasting in Primary Mining of Fully Mechanized Working Face

针对综放工作面回采初期顶煤不能放下、回采率低和瓦斯涌出量大的特点,分析了切眼顶板支护点和周期来压的影响的特点,创新性地提出了回采前放震动炮的措施,以及时将顶煤放下,最大限度地减少煤炭资源损失,并很好地消除工作面瓦斯涌出量大的影响。

In the light of the features of fully mechanized working face in primary mining that the top-coal can not be put down,the recovery ratio is lower and the gas emission rate is greater,this paper analyzes the influences and characteristics of off-cut roof supporting point and periodical weighting,and puts forward the innovative measure of blasting for vibration before coal recovery for putting down the top coal,minimizing the loss of coal resources,and eliminating the impact of greater gas emission from the working face.