基于综合赋权云模型的露天矿岩体可爆性分级识别  

Classification and identification of rock blastability in open-pit mine based on comprehensive weighted cloud model

作　　者：丁小华[1] 原文杰 解祯 李爱和 祁茂富 刘晓明 肖双双 DING Xiaohua;YUAN Wenjie;XIE Zhen;LI Aihe;QI Maofu;LIU Xiaoming;XIAO Shuangshuang(School of Mines,China University of Mining and Technology,Xuzhou 221116,China;Pingshuo Industrial Group Co.,Ltd.,Pingshuo 036006,China;School of Energy Engineering,Xi’an University of Science and Technology,Xi’an 710054,China)

机构地区：[1]中国矿业大学矿业工程学院,江苏徐州221116 [2]平朔工业集团有限责任公司,山西朔州036006 [3]西安科技大学能源学院,陕西西安710054

出　　处：《煤炭科学技术》2019年第10期96-101,共6页Coal Science and Technology

基　　金：陕西省教育厅重点实验室科研计划资助项目(18JS109);国家自然科学基金资助项目(51804299);江苏省自然科学基金资助项目(BK20180646)

摘　　要：露天矿爆破施工要求破碎块度均匀,大块率低,高效发挥铲装、运输设备效率,而矿山岩体可爆性评价是爆破参数优化、质量提高、成本控制的重要依据。为了对岩体可爆性进行科学分级,选择岩石普氏系数、抗拉强度、岩石密度、岩石纵波速度、岩体纵波速度5个指标建立了岩体可爆分级指标体系,确定了岩体可爆性分级标准,计算出了岩体可爆性分级指标的云数字特征,生成了各指标隶属各岩体可爆性等级的云模型,提出了基于综合赋权云模型的岩体可爆性分级方法。将分级模型应用于平朔东露天煤矿,结果表明:东露天煤矿泥岩、砂质泥岩、粉砂岩的可爆性等级均为A,确定度分别为0.5855、0.5844、0.3497;细粒砂岩的可爆性等级为C,确定度为0.1494;中粒砂岩、粗粒砂岩、泥灰岩的可爆性等级均为B,确定度分别为0.2532、0.2129、0.3288。确定度能够精确反映各岩体与各可爆性等级间的隶属程度,有利于更准确地计算炸药单耗,结论的可信度及实用性更高。Blasting operation in open-pit mine requires uniform fragmentation,low proportion of large fragments,and high efficiency of shoveling and transportation equipment.Blasting evaluation of rock mass is an important basis for blasting parameters optimization,quality improvement and cost reduction.In order to carry on the scientific classification to the rock mass blastability,five indexes,such as rock firmness coefficient,tensile strength,rock density,longitudinal wave velocity of rock and longitudinal wave velocity of rock mass,were selected to establish the blastability classification index system,the classification standard of rock mass blastability was determined,the cloud digital characteristics of rock mass blastability classification index were calculated,the cloud model of each index belonging to each rock mass blastability grade was generated,and a classification method of rock mass blastability based on comprehensive weight cloud model was proposed.The model has been applied in Pingshuo east open pit coal mine,the blastability grades of mudstone,sandy mudstone,siltstone,fine-grained sandstone,medium-grained sandstone,coarse-grained sandstone and marl in east open pit coal mine were determined.The rock mass blastability grade of mudstone,sandy mudstone,siltstone is Grade A,the certainty degrees are 0.5855,0.5844 and 0.3497,respectively.The grade of fine-grained sandstone is Grade C,the certainty degree is 0.1494.The grade of mediumgrained sandstone,coarse-grained sandstone and marl is Grade B,the certainty degrees are 0.2532,0.2129 and 0.3288,respectively The certainty degree can accurately reflect the membership degree between each rock mass and each blastability grade,which is conducive to more accurate calculation of explosive consumption,and the conclusion has higher credibility and practicability.

关 键 词：露天矿 可爆性 博弈论 综合赋权 云模型 

分 类 号：TD824.3[矿业工程—煤矿开采]