瓦斯抽放煤层增透深孔聚能爆破钻孔参数  

Drilling parameters of deep-hole cumulative blasting to improve coal seam permeability in gas drainage

作　　者：郭德勇[1] 吕鹏飞[1] 单智勇[2] 谢安[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083 [2]焦作煤业(集团)有限责任公司,焦作454002

出　　处：《北京科技大学学报》2013年第1期16-20,共5页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(41072118);教育部科学技术研究重大项目(311022)

摘　　要：以焦作煤业集团九里山矿煤层深孔聚能爆破试验为基础,利用数值模拟分析了爆破煤体应力变化规律,发现聚能爆破效应导致应力峰值增大,扩大了煤体裂隙区范围.同时对聚能爆破钻孔参数进行优化,确定了合理的炮孔直径、爆破孔间距、爆破孔与邻近抽放孔及煤层顶底板间距.现场试验结果表明:优化的钻孔参数不仅使聚能爆破增透效果显著而且保证了爆破过程的安全.Based on coal seam deep-hole cumulative blasting experiments in Jiulishan Coal Mine of Jiaozuo Coal Group, the law of stress change in a blasting coal body was analyzed by numerical simulation. It is found that cumulative blasting effect leads to the increase of peak stress and enlarges the crack zone range of the coal body. Drilling parameters for cumulative blasting, such as blast hole diameter, blast hole spacing, distance between the blast hole and the adjacent gas drainage hole, and distance from the blast hole to the coal seam roof and floor, were determined by optimization. Field experimental results show that after using these optimized drilling parameters the cumulative blasting not only gets remarkable permeability increasing effect but also ensures blasting safety.

关 键 词：煤矿 瓦斯抽放 透气性 爆破 钻孔 

分 类 号：TD712.62[矿业工程—矿井通风与安全]