CAJ | 학술논문

为掌握在采空区上方开发地下空间时,地下空间开挖对采空区覆岩移动变形的影响情况,以山西拟开发的跨越南坑矿8#煤层部分采空区的某大型地下空间工程为研究对象,采用数值模拟方法研究分析开挖对采空区覆岩的移动变形影响,发现控制层及其稳定性在开挖过程中对地下空间工程的稳定性起着至关重要的作用。开始开挖时控制层在应力作用下纵向下移,在开挖面经过采空区一段时间后停止移动,而非控制层在应力作用下继续移动,导致离层;开挖过程中采空区覆岩横向不同程度的错动,总体趋势是两侧岩层向中间移动;控制层的稳定性对岩层的移动变形有重要作用,控制层稳定存在时,其上部岩层不会产生向下的大变形,否则相反。为进一步开发研究地下空间开挖过采空区时的岩层控制技术提供了理论基础。
위장악재채공구상방개발지하공간시,지하공간개알대채공구복암이동변형적영향정황,이산서의개발적과월남갱광8#매층부분채공구적모대형지하공간공정위연구대상,채용수치모의방법연구분석개알대채공구복암적이동변형영향,발현공제층급기은정성재개알과정중대지하공간공정적은정성기착지관중요적작용。개시개알시공제층재응력작용하종향하이,재개알면경과채공구일단시간후정지이동,이비공제층재응력작용하계속이동,도치리층;개알과정중채공구복암횡향불동정도적착동,총체추세시량측암층향중간이동;공제층적은정성대암층적이동변형유중요작용,공제층은정존재시,기상부암층불회산생향하적대변형,부칙상반。위진일보개발연구지하공간개알과채공구시적암층공제기술제공료이론기출。
The influence of the excavation above goaf on the displacement of rock cover is analyzed by means of numerical simulation method,with the excavation of a large underground space through the goaf of No.8 coal seam of Nankeng Mine in Shanxi province as an example.The study shows that the control layer and its stability play an important role in maintaining the stability of the underground space during excavation.The control layer moves in the longitudinal direction under the action of stress,and it stops moving some time after the excavation face passes the goaf.Discrete layer is formed due to the continuous movement of the non-control layers.The deformation of the rock cover on both wings above the goaf moves towards the center.The stability of the control layer plays a very important role in the deformation of the rock cover.The paper can provide theoretical basis for the further study on the rock layer control technology in the excavation of underground space above goafs.