山东煤炭科技
山東煤炭科技
산동매탄과기
Shandong Coal Science and Technology
2014年
2期
59-60,63
,共3页
松软突出煤层%顺层抽放钻孔%技术研究
鬆軟突齣煤層%順層抽放鑽孔%技術研究
송연돌출매층%순층추방찬공%기술연구
soft coal seam%bedding drainage drilling%technology research
松软突出煤层顺层钻孔预抽瓦斯中存在的钻孔施工困难和瓦斯抽放浓度偏低等关键问题,大众煤矿通过选择合适的钻机具、钻孔施工技术、工艺和改进钻孔布置方式等,提高了顺层孔的施工深度、成孔率、孔径和钻进效率,不仅解决了突出煤层采煤工作面顺层预抽中存在“空白区”的难题,还提高了单孔抽放量;通过改进顺层抽放孔封孔工艺,提高了封孔质量和瓦斯抽放浓度。
鬆軟突齣煤層順層鑽孔預抽瓦斯中存在的鑽孔施工睏難和瓦斯抽放濃度偏低等關鍵問題,大衆煤礦通過選擇閤適的鑽機具、鑽孔施工技術、工藝和改進鑽孔佈置方式等,提高瞭順層孔的施工深度、成孔率、孔徑和鑽進效率,不僅解決瞭突齣煤層採煤工作麵順層預抽中存在“空白區”的難題,還提高瞭單孔抽放量;通過改進順層抽放孔封孔工藝,提高瞭封孔質量和瓦斯抽放濃度。
송연돌출매층순층찬공예추와사중존재적찬공시공곤난화와사추방농도편저등관건문제,대음매광통과선택합괄적찬궤구、찬공시공기술、공예화개진찬공포치방식등,제고료순층공적시공심도、성공솔、공경화찬진효솔,불부해결료돌출매층채매공작면순층예추중존재“공백구”적난제,환제고료단공추방량;통과개진순층추방공봉공공예,제고료봉공질량화와사추방농도。
In soft coal seams that exist in the bedding drilling drainage gas drilling construction difficulties and gas drainage concentration is low key problems,such as Dazhong coal mine by selecting suitable drilling RIGS,drilling construction technology,process and improving drilling arrangement and so on,enhances the construction of bedding hole depth,porosity,pore size and drilling efficiency,not only solved the coal mining face in the bedding drainage exist the problem of "blank area",also raised the single -hole pumping capacity;By improving the bedding drainage hole sealing process,improve the quality of the hole sealing and gas drainage concentration.