不同间距交叉钻孔预抽煤层瓦斯试验研究  

Experimental Study on Crossed Boreholes with Different Spaces for Gas Pre-drainage

作　　者：吴琼[1] 

机构地区：[1]煤炭科学研究总院沈阳研究院,辽宁沈阳110016

出　　处：《中州煤炭》2012年第9期97-99,共3页Zhongzhou Coal

摘　　要：煤层的透气性是影响瓦斯抽放效果的主要因素之一,布置交叉钻孔进行抽放能有效增大煤层的透气性。为使交叉钻孔既能提高煤层的抽放效果,又能尽量缩短工期,对试验区域交叉钻孔的孔间距及预抽时间进行了研究。在同一试验区域中布置了4组不同间距的交叉钻孔,考察了各组钻孔瓦斯预抽效果随时间变化的情况,得出了不同间距下瓦斯预抽率与时间的关系,确定了合理的瓦斯预抽钻孔间距及预抽时间。The permeability of the coal seam is a main factor which influences the effect of gas drainage, reasonable arrangement of crossed boreholes can effectively increase the permeability of the coal seam. To ensure the crossed boreholes both to improve the drain- age effect of the coal seam, and to shorten the construction period, the crossed boreholes spaces and pre-drainage time were studied in the test areas,crossed boreholes with four different spaces were arranged in the same test area,the relationship between the time and gas pre-drainage effect was also investigated for each group of the boreholes. The relationship between pre-drainage rate with different spaces and the time was obtained,the reasonable borehole spaces and pre-drainage time were determined,too.

关 键 词：交叉钻孔 不同间距 预抽效果 

分 类 号：TD712.6[矿业工程—矿井通风与安全]