磷矿地下爆破随钻参数与岩体可爆性关系模型研究  

Modelling of Relationship between Drilling Parameters of Underground Blasting with Rock Blastability in Phosphate Mines

作　　者：盛益明 柴修伟[1] 常志锋 刘建 李治全 向彬 SHENG Yi-ming;CHAI Xiu-wei;CHANG Zhi-feng;LIU Jian;LI Zhi-quan;XIANG Bin(School of Resources and Safety Engineering,Wuhan Institute of Technology,Wuhan 430073,China;Hubei Yihua Group Limited Liability Company,Yichang 443099,China)

机构地区：[1]武汉工程大学资源与安全工程学院,武汉430073 [2]湖北宜化集团有限责任公司,宜昌443099

出　　处：《爆破》2024年第2期120-126,共7页Blasting

基　　金：2021年湖北省安全生产专项资金科技项目(SJZX20211004)。

摘　　要：岩体可爆性分级是确定劳动定额、爆破方案设计和控制炸药单耗的先决条件。为实现岩体可爆性的实时分级,针对宜昌磷矿目前采用的钻爆法施工,以宜昌树崆坪磷矿作为研究背景,基于KJ212-1型全液压掘进钻车,开展了对树崆坪磷矿Ph_(1)^(3)矿体及巷道掘进过程中的含碳泥质白云岩原位随钻参数的测量。结合室内单轴抗压强度试验,建立了单轴抗压强度R_(c)与钻进速度V、钻孔孔径D和回转压力M的关系模型,并对关系模型进行了验证。最后,将该模型代入坚固性系数f关系式中,得出爆破钻孔随钻参数与岩体可爆性分级关系模型。研究结果表明:通过该关系模型计算得出的单轴抗压强度与室内单轴压缩试验结果平均差异率为5.5%,说明其应用于实时预测岩体可爆性的合理性,该模型为岩体可爆性实时分级预测提供了一种更为方便、快捷的方法。岩体可爆性分级结果为白云质条带磷块岩、泥质条带磷块岩和致密条带磷块岩为中等可爆,含碳泥质白云岩为难爆,分级结果可为爆破技术参数选择提供重要依据。Rock blastability classification is a prerequisite for determining labour quotas,designing blasting programmes and controlling the unit consumption of explosives.In order to realize a real-time grading of rock explodability,a measurement of in-situ drilling parameters of carbon-bearing muddy dolomite during the excavation process of Ph_(1)^(3)ore body and roadway in the Shukongping phosphorus mine has been carried out based on the KJ212-1 full-hydraulic boring drilling truck.Combined with the indoor uniaxial compressive strength test,the relationship model between the uniaxial compressive strength R_(c)and the drilling speed V,the drilling hole diameter D and the rotary pressure M was respectively established and verified.Finally,the model is substituted into the solidity coefficient f relationship equation to derive a model for the relationship between the blasthole drill-following parameters and the rock blastability classification.The results of the study show that the average rate of difference between the uniaxial compressive strength calculated by the relational model and the results of the indoor uniaxial compression tests is 5.5%,which demonstrates the reasonableness of applying the model to the real-time prediction of rock blastability.This model provides a more convenient and fast method for real-time grading prediction of rock blastability.The results show that the dolomitic banded phosphorite,mud banded phosphorite and dense banded phosphorite are medium explosive,carbon-bearing mud dolomite is difficult to explode.

关 键 词：钻探参数 随钻测量 岩体可爆性 实时分级 线性拟合 

分 类 号：TD235.3[矿业工程—矿井建设]