五矿贵石沟井15号煤层超前钻孔排放半径测定

Determination of Emission Radius for Advanced Drainage Borehole in No.15 Coal Seam of Guishigou Well in No.5 Coal Mine

超前排放钻孔在现场应用比较广泛。本论文主要利用数值计算与钻孔瓦斯流量法测定煤层超前钻孔排放半径。通过数值计算、现场测试研究得出试验矿井采用?94mm的超前钻孔作为局部防突措施,其有效排放半径可取1.10m作为设计与布置的依据。通过试验研究实现了煤层超前钻孔科学布置防突的有效性、合理性,大大提高五矿贵石沟井局部防突措施的效果。

Advanced drainage borehole has been widely adopted in practice. This paper mainly uses numerical simulation and method of gas flow from borehole to measure the emission radius of the advanced drainage borehole in the coal seam. Through numerical calculation and field test, it is concluded that when the test mine adopts Ф94mm advanced drainage borehole as the outburst prevention measures, the effective emission radius can be taken as 1.05 m as the basis for design and distribution. Through the tests and researches, the rationality and effectiveness of the scientific arrangement of advanced drainage borehole in the coal seam is realized for outburst prevention, which greatly improves the effect of partial outburst prevention measures of Guishigou Well in No. 5 Coal Mine.