棉花坑矿井破碎矿体回采方案研究

Research on Stoping Scheme of Broken Orebody in Mianhuakeng Mine

针对棉花坑矿井的急倾斜破碎薄矿体,提出了无间柱分段深孔爆破连续采矿法。根据该方法的工艺特点提出了“倒台阶形”+上下向布孔分段连续回采、“正台阶形”+上向布孔分段连续回采和“正台阶形”+顶柱+上向布孔分段连续回采方案。通过GRA-AHP和云模型相结合的方式对3种回采方案进行了评价优选,得出“正台阶形”+顶柱+上向布孔分段连续回采方案相对安全、高效。研究结果为棉花坑矿井破碎矿体的开采提供了可行的技术方案。

Aiming at the steeply sloping broken thin orebody in the Mianhuakeng mine,the continuous mining method of deep hole blasting without inter-pillar was proposed.According to the technological characteristics of the method,the"inverted step shape"+up and down hole layout continuous mining,"positive step shape"+upward hole layout continuous mining and"positive step shape"+top pillar+upward hole layout continuous mining were proposed.The GRA-AHP and cloud model were combined to evaluate and optimize the three mining schemes,and it was concluded that the scheme of"positive step shape"+top pillar+upward hole layout is relatively safe and efficient,which provides a feasible technical scheme for the mining of broken orebody in Mianhuakeng mine.