CAJ | 학술논문

龙首矿采用下向水平分层六角形进路充填采矿法,分层道是关键通道,其稳定性至关重要.应用 FLAC3D 软件建立了分层道及六角形进路数值模型,应用强度等效原则确定了分层道底部配筋充填体的力学参数.分别研究了分层道假顶为素充填体和配筋充填体情况下的稳定性.结果表明,分层道开挖暴露的大面积矩形薄板,最大挠曲在中部位置,破坏方式从中部开始拉断破坏,应在开采过程中加强对顶板的支护及对中部位置的监测.此外,分层道假顶为素充填体时不利于矿山的安全生产,尤其在进路与分层道交叉巷道处,应加密配筋密度,防止出现冒落及掉块现象.
룡수광채용하향수평분층륙각형진로충전채광법,분층도시관건통도,기은정성지관중요.응용 FLAC3D 연건건립료분층도급륙각형진로수치모형,응용강도등효원칙학정료분층도저부배근충전체적역학삼수.분별연구료분층도가정위소충전체화배근충전체정황하적은정성.결과표명,분층도개알폭로적대면적구형박판,최대뇨곡재중부위치,파배방식종중부개시랍단파배,응재개채과정중가강대정판적지호급대중부위치적감측.차외,분층도가정위소충전체시불리우광산적안전생산,우기재진로여분층도교차항도처,응가밀배근밀도,방지출현모락급도괴현상.
The underhand cutting and filling method with hexagon access was adopted in Longshou mine where the slicing drift is the critical path and its stability is very important .The numerical model of the slicing drift and hexa -gon access is built by the FLAC 3D software.The mechanical parameters of the reinforcement filling body at the bottom of slicing drift were settled through the application of the equivalent strength principle .With the artificial roof of the slicing drift either as ordinary filling body or as reinforcement filling body ,their stabilities were respectively studied . The analytical results showed that the maximum deflection occurs in the central position of the exposed thin rectangular board when the slicing drift is excavated .And the fracture which is a tensile failure starts at the central position ,so in the process of excavation the support of the roof and the monitoring of the central position should be strengthened .Be-sides,when the artificial roof of slicing drift is ordinary filling body ,it will be harmful to the mine's safety production. Especially in the junction of slicing drift and access higher reinforcement density is needed ,because the rock is prone to fall down.