CAJ | 학술논문

基于金川龙首矿地表移动GPS监测数据,分析了露天采坑围岩移动、变形规律.监测结果表明:地下开采已经引起地表大范围的岩体移动和变形,并形成了2个沉降区和1个上升区;其中上盘沉降区最大沉降量达到767 mm,下盘沉降区最大沉降量达到了1 078 mm,位于露天坑底的上升区最大上升量达到了684 mm.实验模拟了露天转地下开采过程中采坑围岩的移动和变形过程.物理模拟实验结果与监测结果相符,并在露天开采阶段和地下开采阶段都清晰地观测到了坑底隆起现象.在此基础上,从理论上分析了转地下开采后露天采坑底部的隆起机理,认为地下开采活动会使得边坡岩体原有的在露天开挖条件下产生的移动和变形活化,这种活化作用大于地下开采引起的下沉量时,就会造成露天采坑底部的挤压上升.
기우금천룡수광지표이동GPS감측수거,분석료로천채갱위암이동、변형규률.감측결과표명:지하개채이경인기지표대범위적암체이동화변형,병형성료2개침강구화1개상승구;기중상반침강구최대침강량체도767 mm,하반침강구최대침강량체도료1 078 mm,위우로천갱저적상승구최대상승량체도료684 mm.실험모의료로천전지하개채과정중채갱위암적이동화변형과정.물리모의실험결과여감측결과상부,병재로천개채계단화지하개채계단도청석지관측도료갱저륭기현상.재차기출상,종이론상분석료전지하개채후로천채갱저부적륭기궤리,인위지하개채활동회사득변파암체원유적재로천개알조건하산생적이동화변형활화,저충활화작용대우지하개채인기적하침량시,취회조성로천채갱저부적제압상승.
Based on GPS monitoring data, the movement and deformation rules of surrounding rock of open pit in the Longshou Mine of Jinchuan Company have been analyzed. The monitoring results show that underground mining has caused rock mass movement and large-range deformation, with two subsiding troughs separated by a central uplifting zone formed on the surface.The maximum settlement of the hang-ing wall sink area and footwall sink area are 767 mm and 1 078 mm respectively as well as the maxi-mum uplift amount of the rising area in the open pit bottom are 648 mm. And physical simulation ex-periment has been conducted to simulate the movement and deformation process of surrounding rock mass of open pit from open-pit mining to underground mining. The experimental results are consistent with the monitoring results.And the uplift phenomenon of the bottom of open pit in both open-pit mining and underground mining stages has been clearly observed.Moreover, the uplifting mechanism of the open pit bottom after the transformation from open-pit mining to underground mining has been theoretically analyzed, from which a conclusion has been drawn that the earlier movement and defor-mation of slope rock mass caused by open-pit mining would be activated again by the underground mining activities. And when the uplifting amount of the open pit bottom caused by the activation is larger than its settlement caused by underground mining, the open pit bottom will rise because of the extrusion.