顺层长钻孔预抽煤层瓦斯防突技术在潘三矿的应用

淮南矿业集团潘三煤矿是典型的煤与瓦斯突出矿井。针对潘三矿穿层钻孔预抽煤层瓦斯防突措施消突周期长,工程量大,掘进速度慢等问题,选择17171(1)轨道、运输顺槽试验顺层钻孔预抽煤巷条带煤层瓦斯区域防突措施。自执行顺层长钻孔预抽煤层瓦斯防突措施以来,煤层最大残存瓦斯含量为4.17 m3/t,最大残余瓦斯压力为0.32 MPa,钻屑量S值在4.0～5.4 kg/m之间,钻孔瓦斯涌出初速度q在0.9～2.7 L/min之间,均无超标现象,实现瓦斯零超限,巷道瓦斯涌出量减小,有效地消除了煤与瓦斯突出危险性,实现工作面安全快速掘进。

Application of Outburst Elimination Technology for Pre-pumping Coal Seam Gas of Long Boreholes Along Seam in Pansan Coal Mine

Pansan Coal Mine of Huainan Mining Group is a typical coal and gas outburst mine.Aiming at the problems of long outburst eliminating period,large projects and slow driving for outburst prevention measures of drilling pre-pumping coal seam,the regional outburst prevention measures of drilling along coal seam and pre-pumping the coal seam gas of roadway strip were tested at 17171(1) track and transport crossheading.Since the outburst prevention measures of long drilling along coal seam and pre-pumping the coal seam gas were taken,the max remaining gas content was 4.17 m3/t in coal seam,the max remaining gas pressure was 0.32 MPa.Drilling crumbs amount S was between 4.0～ 5.4 kg/m,initial velocity q of borehole gas emission was between 0.9～2.7 L/min,both S and q were not beyond the standard.Gas concentration was not overrun,gas emission decreased in the roadway,the measures eliminated the risk of coal and gas outburst effectively,thus safe and rapid excavation of the working face was achieved.