矿冶工程
礦冶工程
광야공정
Mining and Metallurgical Engineering
2015年
5期
22-24,27
,共4页
顶底双软薄煤层%沿空留巷%膏体充填%巷内充填%巷道支护
頂底雙軟薄煤層%沿空留巷%膏體充填%巷內充填%巷道支護
정저쌍연박매층%연공류항%고체충전%항내충전%항도지호
thin coal seam with weak roof and floor%gob-side entry retaining%paste filling%backfilling in the roadway%roadway support
针对顶底双软薄煤层沿空留巷出现的问题,基于矿压关键层理论,分析了沿空留巷围岩变形机理,提出了预掘软弱顶板,建立"Z"字台阶型沿空留巷结构的错位沿空留巷方法. 现场实测表明:该方法采用优先垒砌矸石墙,巷道内及时构建胶结充填体和单体支柱补强支护的沿空留巷工艺,留巷效果良好.
針對頂底雙軟薄煤層沿空留巷齣現的問題,基于礦壓關鍵層理論,分析瞭沿空留巷圍巖變形機理,提齣瞭預掘軟弱頂闆,建立"Z"字檯階型沿空留巷結構的錯位沿空留巷方法. 現場實測錶明:該方法採用優先壘砌矸石牆,巷道內及時構建膠結充填體和單體支柱補彊支護的沿空留巷工藝,留巷效果良好.
침대정저쌍연박매층연공류항출현적문제,기우광압관건층이론,분석료연공류항위암변형궤리,제출료예굴연약정판,건립"Z"자태계형연공류항결구적착위연공류항방법. 현장실측표명:해방법채용우선루체안석장,항도내급시구건효결충전체화단체지주보강지호적연공류항공예,류항효과량호.
Aiming at the problems in the gob-side entry retaining technique for the thin coal seam with weak roof and floor, deformation mechanism for wall rock of gob-side entry was analyzed based on the key strata theory for ground control. It is proposed to tunnel the weak roof in advance so as to set gob-side entry in form of Z-type benches. The on-site practice included setting up a waste wall, followed by constructing cemented backfilling in the roadway and supporting by individual pillar in time, which brought a good performance.
