煤矿开采
煤礦開採
매광개채
COAL MINING TECHNOLOGY
2015年
1期
51-55
,共5页
大断面煤巷%快速掘进%二次支护%数值模拟%工业性试验
大斷麵煤巷%快速掘進%二次支護%數值模擬%工業性試驗
대단면매항%쾌속굴진%이차지호%수치모의%공업성시험
large-section coal roadway%fast driving%secondary supporting%numerical simulation%industrial test
在改进煤巷掘进工艺的基础上较为系统地提出大断面煤巷快速掘进二次支护理论（简称煤巷二次支护），将煤巷一次成巷支护分为掘进安全支护和补强稳定支护，并分析两次支护的时空关系及应用效果。通过理论分析可知，掘进安全支护施工后，煤巷支护为局部的低强度柔性支护，允许围岩变形，保证煤巷掘进空间安全；补强稳定支护施工后，煤巷支护是全面的高强度刚性支护，限制围岩有害变形，维持巷道围岩的长期稳定。结合马道头5203回风巷的工程地质条件，通过数值分析和工业性试验可知，煤巷二次支护技术能够在保证煤巷掘进空间安全前提下，提高煤巷掘进速度。
在改進煤巷掘進工藝的基礎上較為繫統地提齣大斷麵煤巷快速掘進二次支護理論（簡稱煤巷二次支護），將煤巷一次成巷支護分為掘進安全支護和補彊穩定支護，併分析兩次支護的時空關繫及應用效果。通過理論分析可知，掘進安全支護施工後，煤巷支護為跼部的低彊度柔性支護，允許圍巖變形，保證煤巷掘進空間安全；補彊穩定支護施工後，煤巷支護是全麵的高彊度剛性支護，限製圍巖有害變形，維持巷道圍巖的長期穩定。結閤馬道頭5203迴風巷的工程地質條件，通過數值分析和工業性試驗可知，煤巷二次支護技術能夠在保證煤巷掘進空間安全前提下，提高煤巷掘進速度。
재개진매항굴진공예적기출상교위계통지제출대단면매항쾌속굴진이차지호이론（간칭매항이차지호），장매항일차성항지호분위굴진안전지호화보강은정지호，병분석량차지호적시공관계급응용효과。통과이론분석가지，굴진안전지호시공후，매항지호위국부적저강도유성지호，윤허위암변형，보증매항굴진공간안전；보강은정지호시공후，매항지호시전면적고강도강성지호，한제위암유해변형，유지항도위암적장기은정。결합마도두5203회풍항적공정지질조건，통과수치분석화공업성시험가지，매항이차지호기술능구재보증매항굴진공간안전전제하，제고매항굴진속도。
On the basis of improving coal roadway driving technique, secondary supporting theory of fast driving large-section coal-roadway was put forward which divided one-time supporting into safe supporting in driving and reinforcement supporting.Time and space relation between the two supporting and application effect was analyzed.By theoretical analysis, it was known that after safe supporting in driving, the supporting was local flexible supporting with low strength and permit deformation.After reinforcement supporting, it be-came wholly-rigid supporting with high strength, control harmful deformation and keep long-term stability of surrounding rock.Industrial test in 5203 air-roadway of Madaotou Colliery showed that secondary supporting technology could improve driving speed of coal roadway on the premise of keeping safety of driving mining.
