中文摘要：

在我国南方一矿井深孔控制预裂爆破试验基础上，利用ASAP-2010型表面积及微孔快速测定仪，对距离爆破孔3．0～9．7m范围内的煤样进行微观结构分析，并结合煤层瓦斯抽放结果进行对比研究。结果表明，随着至爆破孔距离的增加，煤的Langmuir和BET比表面积近似线性减少，在9．7m处分别减小68．8％和15．26％；煤的微孔体积比和面积比先减小后增加，小孔、中孔体积比和面积比先增加后减小；煤渗透孔体积比先略有增大而后减小，在孔距3．9m处达到最大值，即26．88％。深孔控制预裂爆破后，最大瓦斯抽放量增加36％，最初15d抽放总量提高93％。深孔控制预裂爆破的适宜孔间距为10～12m。

英文摘要：

To find out the influence of deep-hole controlled pre-cracking explosion on microstructure of coal, a field test of deep-hole controlled pre-cracking explosion was carried out in a mine located in south China. In the test, the microstructures of some coal samples, taken from different spots that were 3.0 to 9.7 m away from the explosive hole, were observed carefully with ASAP - 2010（automated surface area analyzer - 2010）. Besides, the performance of gas drainage was studied. The results showed that, with the increment of distance from explosive hole, the Langmuir surface area and BET surface area decreased linearly. At the spot 9.7 m away from explosive hole, Langmuir surface area and BET surface area decreased 68.8% and 15.26% respectively. The volumetric ratio and area ratio of micropores decreased at first and increased then. On the contrary, the volumetric ratio and area ratio of small-pores and mid-size-pores increased at first and decreased then. The volume ratio of penetrating pores increased a little at the beginning and decreased then. The peak value, which was 26.88%, was 3.9 m away from the exploding hole. After explosion, the highest gas drainage volume increased 36%, and the total gas drainage volume in the first 15 days increased 93%. The optimum distance among exploding holes of deep-hole controlled pre-cracking explosion should be between 10 to 12 m.