CAJ | 학술논문

为了探明缓倾斜矿体开采时开采扰动对间柱及底部结构可靠性的影响，采用 FLAC2D 软件建立了充填体及矿岩力学模型，根据莫尔－库仑屈服准则，进行了采矿动力学二维数值模拟。结果表明，采动过程中最大主应力集中在间柱上，应力值高达30～40 MPa；矿石放出时间柱与顶板交接处及底部结构都出现破坏性的拉应力区；开采后间柱塑性区较小，但底部结构的桃形矿柱及电耙道周围出现不同程度的塑性区；当两侧采场开采结束时，中央采场最大顶板位移为50 mm。提出了精确测量、微差爆破等手段提高间柱稳定性，采用锚杆＋喷射混凝土的支护方式、光面爆破等方法来提高底部结构的稳定性。
위료탐명완경사광체개채시개채우동대간주급저부결구가고성적영향，채용 FLAC2D 연건건립료충전체급광암역학모형，근거막이－고륜굴복준칙，진행료채광동역학이유수치모의。결과표명，채동과정중최대주응력집중재간주상，응력치고체30～40 MPa；광석방출시간주여정판교접처급저부결구도출현파배성적랍응력구；개채후간주소성구교소，단저부결구적도형광주급전파도주위출현불동정도적소성구；당량측채장개채결속시，중앙채장최대정판위이위50 mm。제출료정학측량、미차폭파등수단제고간주은정성，채용묘간＋분사혼응토적지호방식、광면폭파등방법래제고저부결구적은정성。
In order to investigate the influence of mining disturbance on reliabilities of trip pillar and bottom structure in flat-lying deposit,mechanical models of filling materials and rocks were built,and two-di-mensional simulation of mining dynamics was conducted by using FLAC2D software according to Mohr-Coulomb criteria.Results showed that maximum principal stress,with a highest value of 30 ~40 MPa, tended to concentrate on pillars.Plastic zones spread less in pillars,whereas spread more around the peach-shape pillars and rake roadways in the bottom structure.With mine-out stopes on both sides,the max-imum roof settlement of the central stope reached 50 mm.On the basis of the simulation,accurate survey-ing and millisecond blasting were proposed to improve the pillar stability.Additionally,methods to en-hance the bottom structure were also presented,these approaches included supporting with rock bolt and shooting concrete,improvement of blasting parameters and implement of smooth blasting.