Experimental Study of Pre-splitting Blasting Enhancing Pre-drainage Rate of Low Permeability Heading Face

摘要：

Taking the heading face of a coal mine as an example, the test of deep-hole pre-splitting blasting was processed. The amount of gas draining after presplitting was compared to the amount of direct drainage, and the effective radius of drainage was surveyed. The test results showed that the drainage rate of K, coal seam reached 37.13％, which reduced the drainage time by 60％, 10 days after presplitting, and the gas desorption index exceed the standards until the fifth blasting. The drainage rate of K4 needed 12 days to reach 34.28％, which reduced the drainage time by 60％, and the gas desorption index exceed the standards when the third blasting processed. Obviously, the effect of gas drainage was improved by pre-splitting blasting. The effective drainage radius of K1 and K4 were 4.5 m and 5.2 m respectively after pre-splitting blasting.

关键词： heading face pre-splitting blasting drainage radius coal mine

作者: Liu Jingcheng Wang hongtu Yuan Zhigang Fan Xiaogang

作者单位: State and local joint engineering laboratory of methane drainage in complex coal gas seam, Chongqing State and local joint engineering laboratory of methane drainage in complex coal gas seam, Chongqing

会议类型: 国际会议

会议名称: The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)

会议地点: 北京

会议语种:英文

页码: 847-852

在线出版日期: 2011-10-27（万方平台首次上网日期，不代表论文的发表时间）