【摘要】 为填补面源爆破拆除工程粉尘扩散模型研究领域的空白,更加科学有效地指导面源爆破拆除工程粉尘控制,在分析爆破拆除工程粉尘扩散规律的基础上,对烟团模型在x和y方向进行二维积分,建立了面源爆破拆除工程粉尘扩散模型进行研究。选择青海某火电厂整体爆破拆除工程作研究样本,在距爆破拆除对象中心200 m外每间隔30 m设一个粉尘浓度监测点位,把爆破拆除过程中粉尘的监测浓度与模型预测浓度进行对比,以验证模型。结果表明:粉尘预测浓度在距爆破中心200 m、230 m、260 m和290 m处分别为34.97 mg/m~3、21.14 mg/m~3、8.53 mg/m~3和1.91 mg/m~3,对应的粉尘监测浓度分别为23.61 mg/m~3、15.65 mg/m~3、6.56 mg/m~3和1.30 mg/m~3,粉尘的预测浓度略高于实际监测浓度,但考虑到监测值平均性和预测值瞬时性,以及实际爆破拆除工程中有效的降尘措施,面源爆破拆除工程粉尘扩散模型的预测数据与实际情况有较好的一致性。更多还原

【Abstract】 In order to fill the gaps in the field of non-point blasting dust diffusion model study,and to more scientifically and effectively control the non-point blasting dust,the dust diffusion model of non-point source demolition blasting was built on the basis of blasting dust diffusion law analysis and correcting the puff model in the x and y directions. Choose a explosive demolition of whole power plant in Qinghai province as research example,the dust concentration was monitored with interval of 30 m,200m away from the center of the blasting object,and comparing with the predicted values of the dust diffusion model. The results show that,relative to the predicted values were23. 91 mg/m~3( 200 m),21. 14 mg/m~3( 230 m),8. 53 mg/m~3( 260 m) and 1. 91 mg/m~3( 290 m),the corresponding monitored values were 23. 61 mg/m~3,15. 65 mg/m~3,6. 56 mg/m~3 and 1. 30 mg/m~3. The predicted values are slightly higher than the monitored. However,taking into account the monitoring of the average and predictive value of the instantaneous,and the effective dust reduction measures,the predicted values from the proposed model agreed with the measured values well.更多还原