煤炭工程 ›› 2014, Vol. 46 ›› Issue (4): 35-37.doi: 10.11799/ce201404012

• 施工技术 • 上一篇    下一篇

综采工作面煤层超前深孔预裂爆破增透试验研究

周应江1,2,张友博1,2,李良山2,黄文尧1,3,王道阳1,3   

  1. 1.
    2. 国投新集能源股份有限公司新集二矿
    3. 安徽理工大学
  • 收稿日期:2013-09-26 修回日期:2013-11-23 出版日期:2014-04-11 发布日期:2014-04-10
  • 通讯作者: 李良山 E-mail:guohuicumt@163.com
  • 基金资助:

    安徽省高等学校省级自然科学重点项目

Experiment and Research on Advanced Deep Hole Pre-splitting Blasting Increased Permeability of Fully-mechanized Face

  • Received:2013-09-26 Revised:2013-11-23 Online:2014-04-11 Published:2014-04-10

摘要:

受采煤工作面接替紧张的影响,抽采时间短的采煤工作面回采过程中存在瓦斯超限的问题,通过在原抽采孔中间布置爆破孔,采用直径为63mm的煤矿瓦斯抽采水胶药柱进行超前深孔预裂爆破增透本煤层,实测抽采孔瓦斯浓度提高2.2倍,流量提高5倍以上,煤层透气性大大增加,工作面推进速度提高3倍,有效解决了瓦斯超限问题。

关键词: 预裂爆破, 煤层透气性, 煤矿瓦斯抽采水胶药柱, 综采工作面

Abstract:

Due to the influence of coal mining to replace, there exists the problem of the gas concentration exceeding limits in the process of work face mining, which with short extraction time. By arranging blast hole in the middle of gas extraction holes, charging with a diameter of 63mm water gel explosive grain of coal mine gas extraction to increase permeability of the mining-coal bed by advanced deep hole pre-splitting blasting. With the method used in field application ,the concentration of gas extracted is increased by 2.2 times, the flow rate increased by more than five times, coal seam permeability is increased greatly, working face advancing speed increased by 3 times, the problem of gas overrun is solved effectively.

Key words: deep hole pre-splitting blasting, coal seam permeability, water gel explosive grain of coal mine gas extraction, fully-mechanized face