摘要
采煤工作面煤体受支撑压力作用产生的塑性变形,在煤壁前方形成孔(裂)隙重新生成区、孔(裂)隙微闭合区和原始孔(裂)隙区3个区域。根据三交河煤矿2-508工作面塑性区宽度计算结果,确定出各个区域的具体范围。在3个区域采取特殊的钻孔布置形式和注水参数进行注水试验后,煤体水分从1.07%增加到2.51%;工作面总粉尘降尘效率达到74%,呼吸性粉尘降尘效率达到56%。利用工作面煤体不同孔(裂)隙发育特性,采取有针对性的煤层注水工艺参数可有效提高煤层注水效果。
Through the analysis of the plastic deformation of coal seam caused by the support pressure, we thought that it formed hole （crack） gap regeneration area, hole （crack） gap close area and the original hole （crack） gap area ahead of the coal wall. According to plastic range data of theoretical calculation in 2-508 face of Sanjiaohe Coal Mine, we determined three areas. By reasonable choice of infusion parameter in three areas, the final moisture of coal is increased from 1.07% to 2.51%. The removal efficiency of total dust in coal face increased to 74%, and the removal efficiency of respirable dust is increased to 56%. Using different pore fracture characteristics of face, adopting the corresponding coal seam water injection parameters can effectively improve the effect of coal seam water injection.
出处
《煤矿安全》
CAS
北大核心
2016年第2期18-20,共3页
Safety in Coal Mines
关键词
煤层注水
坚硬煤层
注水压力
孔(裂)隙发育特性
粉尘防治
coal seam water infusion
hard coal seam
water injection pressure
pore fracture characteristic
dust control
