基于钻孔过程监测的花岗岩钻进比能研究

发布时间：2019-06-19 11:07

【摘要】：为了探究钻进参数与岩石质量之间的相关性关系,并寻求一个能够定量描述岩体质量的参数,利用安装了DPM系统的SGZ-IIIA型取芯钻机对一块1.25 m×2.00 m×1.00 m的花岗岩进行了6次钻孔试验,对每个孔设置不同的推进压强和转速等参数(压强分为400 kPa、600 kPa、800 kPa三挡,转速分为128 r/min、200 r/min两档),根据钻进位移与钻进时间计算得出钻进速度。结果表明,对于同一种岩石,如果在钻进过程中,转速、扭矩、推进压力等钻进参数不同,那么钻进速度也会相应变化,无法仅利用钻进速度来定量描述岩体质量,无法发挥DPM的优势。通过理论分析与花岗岩试验结果可知,钻进耗能为1.11~1.83 kJ/cm~3,平均值为1.523 kJ/cm~3,基于能量守恒定律,引入钻进比能的概念,发现此参数与岩石物理力学强度参数相关性高,可以用来表征岩石质量,从而实现通过岩石钻进快速确定岩体质量。
[Abstract]:In order to study the relationship between the drilling parameters and the quality of the rock, and to find a parameter which can quantitatively describe the mass of the rock mass, six drilling tests were carried out on a 1.25m-2.00m-1.00m-rated granite using the SGZ-IIIA core drilling machine installed with the DPM system. The parameters (pressure:400 kPa,600 kPa,800 kPa three-way and rotational speed of 128r/ min and 200r/ min) are set for each hole, and the drilling speed is calculated according to the drilling displacement and drilling time. The results show that, for the same kind of rock, if the drilling parameters such as the rotational speed, the torque and the propulsion pressure are different during the drilling process, the drilling speed will change accordingly, and the quality of the rock mass can not be quantitatively described by using the drilling speed, and the advantages of DPM can not be realized. According to the theoretical analysis and the results of the granite test, the drilling energy consumption is 1.11 ~ 1.83 kJ/ cm ~ 3, the average value is 1.523 kJ/ cm ~ 3, the concept of drilling specific energy is introduced based on the energy conservation law, and it is found that this parameter is high with the physical and mechanical strength parameters of the rock and can be used to characterize the rock quality. So as to realize the rapid determination of the mass of the rock mass through the rock drilling.
【作者单位】：中国水利水电科学研究院流域水循环模拟与调控国家重点实验室;
【基金】：国家重点研发计划(2016YFC0401801大埋深隧洞岩体工程特性测试技术与综合评价方法) 国家“973”计划(2015CB07072TBM安全高效掘进全过程信息化智能控制与支撑软件基础研究) 中国水科院动态调研专项(GE0145C082016,TBM施工围岩工程特性测试技术与评价方法研究前沿与发展趋势)
【分类号】：TV554

【相似文献】