坪上煤矿不同孔径超前钻孔有效排放半径的测定  

Determination of Effective Emission Radius of Advancing Hole with Different Diameter in Pingshang Coal Mine

作　　者：宋军 

机构地区：[1]山西省煤炭厅基建局,山西太原030006

出　　处：《煤矿安全》2012年第10期131-134,共4页Safety in Coal Mines

摘　　要：介绍了超前排放钻孔的防突原理,并详细阐述了有效半径的测定方法及适用条件,针对坪上煤矿3#煤层硬、煤层厚等特点,对现有的钻孔瓦斯流量测定排放钻孔方法进行创新,并利用该方法测得了3#煤层不同孔径的超前钻孔有效排放半径,为矿井局部防突排放钻孔的设计提供了依据,提高了防突措施效果。The paper introduces the outburst prevention principle of advancing emission hole,and elaborates on the measurement method and the applicable conditions of the effective radius in detail.According to the characteristics of hardness and thickness of 3# coal seam in Pingshang coal mine,the paper innovates existing borehole gas flow measuring emissions hole method.Using this method,effective emission radiuses of advancing hole with different diameter in 3# coal seam are got,which provides the basis for the design of mine local prevention outburst emission,and improves the outburst prevention measures results.

关 键 词：局部防突措施 超前钻孔 有效排放半径 

分 类 号：TD713[矿业工程—矿井通风与安全]