CAJ | 학술논문

以铜坑矿92#矿体连续采矿顶板诱导崩落采场为研究对象,建立模拟的卸荷计算流程.依据影响区域理论的卸荷带划分方法,基于开挖卸荷过程中岩体力学参数变化规律,利用有限元软件MIDAS/GTS对地下连续采矿过程进行卸荷分析,并与常规分析进行对比.结果表明:卸荷分析的顶板最大拉应力、下沉位移以及等效塑性应变分别达到1.5 MPa、20 cm和1.5％；常规分析的顶板最大拉应力、下沉位移以及等效塑性应变分别为1.0 MPa,13 cm和0.9％；卸荷分析值均比常规分析值大,更接近实际情况:连续采矿开采的最大步距为48 m,在开采两步距以后,应当对顶板进行诱导处理.
이동갱광92#광체련속채광정판유도붕락채장위연구대상,건립모의적사하계산류정.의거영향구역이론적사하대화분방법,기우개알사하과정중암체역학삼수변화규률,이용유한원연건MIDAS/GTS대지하련속채광과정진행사하분석,병여상규분석진행대비.결과표명:사하분석적정판최대랍응력、하침위이이급등효소성응변분별체도1.5 MPa、20 cm화1.5％；상규분석적정판최대랍응력、하침위이이급등효소성응변분별위1.0 MPa,13 cm화0.9％；사하분석치균비상규분석치대,경접근실제정황:련속채광개채적최대보거위48 m,재개채량보거이후,응당대정판진행유도처리.
Taking the test stopes during continuous mining induced roof caving of Tongkeng ore-body No.92 as example,the calculation flow of unloading analysis was established.According to the unloading region division method of the affected zone theory,and the deterioration laws of mechanics parameters of unloading rock mass,the continuous mining process in underground mine was analyzed by the software MIDAS/GTS,the mechanical response of roof rock mass unloading was studied,and the differences were analyzed with the conventional simulation.The result shows that the maximum tensile stress,subsidence displacement and equivalent plastic strain of roof rock mass are 1.5 MPa,20 cm and 1.5％ in the unloading analysis,while 1.0 MPa,13 cm and 0.9％ in the conventional analysis.The values of unloading analysis,which are also closer to the actual situation,are greater than those of conventional analysis; the maximum step in continuous mining is 48 m,which shows that the induced treatment of the roof should be carried out after 2 mining steps