CAJ | 학술논문

针对铜坑矿矿石结块问题,运用爆破放顶技术,诱导结块矿石的自然崩落分解。以结块矿石为研究对象,利用LSDYNA数值软件对不同跌落角度、跌落高度和弱结构参数条件下的跌落过程进行仿真模拟试验,获得了结块矿石的崩落分解规律,提出了相应的诱导崩落技术参数。研究结果表明：①结块矿石在跌落高度为5m和崩落角度30°时能够获得很好的崩解效果,崩解率达到100%。②结块矿石与触地接触面的高度应不小于5 m,并且诱导爆破超深面与水平形成的夹角θ需满足5°<θ<30°。研究结果为实施诱导破碎结块矿石的技术工艺和参数提供了理论依据。
침대동갱광광석결괴문제,운용폭파방정기술,유도결괴광석적자연붕락분해。이결괴광석위연구대상,이용LSDYNA수치연건대불동질락각도、질락고도화약결구삼수조건하적질락과정진행방진모의시험,획득료결괴광석적붕락분해규률,제출료상응적유도붕락기술삼수。연구결과표명：①결괴광석재질락고도위5m화붕락각도30°시능구획득흔호적붕해효과,붕해솔체도100%。②결괴광석여촉지접촉면적고도응불소우5 m,병차유도폭파초심면여수평형성적협각θ수만족5°<θ<30°。연구결과위실시유도파쇄결괴광석적기술공예화삼수제공료이론의거。
To deal with the caking ore in Tongkeng mine,the blasting caving technique was used to induce caving and break caking ore. Taking caking ore as the object,and with LS-DYNA numerical software,tests were designed to simulate the breaking process of caking ore in different dropping heights,angles and strength of weak structure. Broken laws of caking ore were obtained,and the corresponding induced caving parameters were raised. Results showed that①better caving result was got in condition of the caving height 5 m and the caving angle 30°,the broken rate is up to 100%.②height between the caking ore and contact surface should be more than 5 m,and the angle between the ultra-deep blasting surface and horizontal plane need to be 5°<θ<30°. Research results provide theoretical basis for the processes and parameters of broken caking ore induced by caving.