CAJ | 학술논문

通过煤系地层露头的现场考察研究，揭示了煤巷顶板岩层基本赋存特征，采用数值模拟研究了规则块状赋存顶板稳定性，进而分析总结了煤巷顶板岩层力学结构形式及其稳定性，并对葛泉矿一条轨道巷大青灰岩顶板进行了探测分析及支护应用。结果表明：煤巷顶板具有层状赋存、受节理裂隙面切割成为不同尺度的块体两个显著特征；规则块状赋存顶板易于形成相互铰接的多块体平衡岩梁结构，属于易于稳定岩层，其中弱面间距与岩层悬露跨度相近情况下，弱面位于巷道跨中位置，岩层和巷道围岩整体的稳定性最差，位于帮角时次之；当弱面间距远小于岩层悬露尺寸时，影响相对较小，岩层和巷道围岩整体比较易于稳定。
통과매계지층로두적현장고찰연구，게시료매항정판암층기본부존특정，채용수치모의연구료규칙괴상부존정판은정성，진이분석총결료매항정판암층역학결구형식급기은정성，병대갈천광일조궤도항대청회암정판진행료탐측분석급지호응용。결과표명：매항정판구유층상부존、수절리렬극면절할성위불동척도적괴체량개현저특정；규칙괴상부존정판역우형성상호교접적다괴체평형암량결구，속우역우은정암층，기중약면간거여암층현로과도상근정황하，약면위우항도과중위치，암층화항도위암정체적은정성최차，위우방각시차지；당약면간거원소우암층현로척촌시，영향상대교소，암층화항도위암정체비교역우은정。
Based on spot investigation of coal-bearing sequences crop , the occurrence characteristics of roof strata in coal roadway were revealed , and the stability of regular blocks occurrence roof was studied by numerical simula-tion.Then the mechanics structure and stability of roof strata were analyzed .The detection analysis and support ap-plication were conducted on blue-grey strata roof of a track tunnel in Gequan mine .The results showed that the roof strata in coal roadway have two basic occurrence characteristics:terrain occurrence and different scale of block cut by cleat or fracture .Regular blocks occurrence roof is easy to form multiple blocks balanced beam , which belongs to stable strata .The stability of strata and surrounding rock with weak plane on the middle of roadway is worst when the distance between weak planes is close to strata span .When the distance between weak planes is far less than strata span , the strata and surrounding rock is easy to be stable .