CAJ | 학술논문

为了解决近距离煤层群下位煤层沿空留巷受多次采动影响，巷道围岩变形破坏严重的问题，采用理论分析、数值模拟和现场实测方法，研究了巷道与回采空间合理的相对位置及支护参数。研究结果表明：上位煤层开采后在采空区正下方出现一定范围的应力降低区，为沿空留巷的布置创造了有利条件；上位煤层残留煤柱下方一定范围出现应力集中，煤柱影响范围和3+4煤层的交接与煤柱的水平距离为10.8~11.54 m。现场矿压观测表明，沿空留巷布置及巷道支护设计是合理的，巷道顶底板移近量以及墙体受力大小都在可控的范围内，为相似条件下沿空留巷合理空间布置及支护设计提供了依据和指导。
위료해결근거리매층군하위매층연공류항수다차채동영향，항도위암변형파배엄중적문제，채용이론분석、수치모의화현장실측방법，연구료항도여회채공간합리적상대위치급지호삼수。연구결과표명：상위매층개채후재채공구정하방출현일정범위적응력강저구，위연공류항적포치창조료유리조건；상위매층잔류매주하방일정범위출현응력집중，매주영향범위화3+4매층적교접여매주적수평거리위10.8~11.54 m。현장광압관측표명，연공류항포치급항도지호설계시합리적，항도정저판이근량이급장체수력대소도재가공적범위내，위상사조건하연공류항합리공간포치급지호설계제공료의거화지도。
In response to the serious problem of deformation and fracture caused by repeated mining gob-side entry retaining in the lower coal seam, the reasonable location and the support parameter be-tween the roadway and excavation have been studied by using numerical simulation filed practice and theoretical calculation. The result has shown that a certain range of stress-relaxed area below the goaf arises after the upper coal seam mining, which creates favorable conditions for gateway layout;Howev-er a certain range of stress-concentrated area below the residual pillar arises, and the influence outside scope of which spread to 10.8-11.54 m from coal pillar in coal seam 3+4. Adopting the method of mul-tipoint displacement monitoring roof-floor and lanes convergence, the result has shown that the amount is within the controllable range. The arrangement and support design for the remained gateway along goaf, according to engineering practice, is reasonable. Research results have provided the basis and guidance for the reasonable layout and support design of gob-side remained gateway under similar con-ditions.