云盖山煤矿二矿超前钻孔有效排放半径的研究与应用

Research and application of effective discharge radius of advanced borehole in Yungaishan No.2 Coal Mine

介绍了云盖山煤矿二矿超前钻孔有效排放半径的测定方法,通过采取钻屑指标法进行超前钻孔有效排放半径的现场测定,确定了超前钻孔有效排放半径结果;并结合云盖山煤矿二矿23301综采工作面回采期间过断层需要采取局部防突措施,通过利用超前钻孔有效排放半径布置排放钻孔,有效保障了回采期间施工安全。

This paper introduced the measuring method of effective discharge radius of advanced drilling hole in No.2 Coal Mine of Yungaishan Coal Mine,determined the effective discharge radius of advanced drilling hole by means of on-site measurement of effective discharge radius of advanced borehole by means of drilling cuttings index method,and combined with the results of effective discharge radius of advanced drilling hole in No.2 Coal Mine of Yungaishan Coal Mine,during the mining period of 23301 fully mechanized mining face,local effective discharge radius arranged discharge boreholes,which effectively reduced the construction safety during mining and ensured the safe mining of working face.