摘要
针对露天矿爆区粉尘浓度不易测量的问题,提出了一种基于图像技术的爆区粉尘浓度测量方法。采集爆破区域内粉尘图像及典型测点的粉尘浓度信息,优选高斯滤波降噪方法并确定灰度级α为128,对粉尘图像进行降噪、增强和分割处理,有效识别粉尘区域与背景区域边界,提高了粉尘图像灰度信息提取的准确性。采用函数拟合法,优化建立爆区粉尘浓度和灰度值的函数为:C=-0.01157G^(2)+2.342G-104.1,并应用于矿山爆区粉尘浓度测量中。结果表明:爆区粉尘浓度在起爆后第7秒达到峰值13.824 mg/m^(3),在第90秒下降到3.749 mg/m^(3);在第6秒时,爆区左后方的高浓度粉尘云团处于距地表3~52 m高度,其影响区域范围为110 m×60 m,爆区右上方的高浓度粉尘云团处于距地表52 m以上的位置,其影响区域范围为59 m×56 m;在第90秒时,粉尘云团集中在距地表40 m以上的位置,影响范围为120 m×67 m,与实际情况相符,验证了所提出的粉尘浓度测量方法的有效性。
Aiming at the issue of difficulty measurement of dust concentration in blasting area of open-pit mine,a measurement method of dust concentration in blasting area based on image technology was proposed.The dust images in blasting area and the dust concentration information of the typical measuring points were collected.The Gaussian filter noise reduction method was optimized and the gray levelαwas optimized as 128 to effectively identify the boundary between the dust area and the background area,andthe accuracy of the gray information extraction of the dust image was improved by using the image technologies such as the noise reduction,enhancement and segmentation of the dust image.Using the function fitting method,the function of dust concentration and gray value in blasting area was optimized and established as C=-0.01157G^(2)+2.342G-104.1,which was applied to the measurement of dust concentration in the mine blasting area.The results show that the dust concentration in blasting area reaches the peak of 13.824 mg/m^(3) at 7th second and decreases to 3.749 mg/m at 90th second after blasting.At 6th second,the high concentration dust cloud in the left rear of blasting area is 3-52 m above the surface,and its influence area is 110 mX 60 m.The high concentration dust cloud in the upper right of blasting area is more than 52 m above the surface,and its influence area is 59 m X56 m.At 90th second,the dust cloud is concentrated at a position above 40 m from the surface,and the influence range is 120 m X 67 m,which is consistent with the actual situation and verifies the effectiveness of the proposed measurement method of dust concentration.
作者
余晓轲
柯丽华
张光权
胡南燕
蒋玉文
黄兆云
YU Xiaoke;KE Lihua;ZHANG Guangquan;HU Nanyan;JIANG Yuwen;HUANG Zhaoyun(School of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan,Hubei 430081,China;Hubei Depth of field Safety Technology Co.,Ltd.,Yichang,Hubei 443000,China)
出处
《矿业研究与开发》
CAS
北大核心
2024年第4期168-174,共7页
Mining Research and Development
基金
湖北省安全生产专项资金项目(SJZX20211004)。
关键词
露天矿
图像技术
爆破粉尘
粉尘浓度
灰度值
Open-pit mine
Image technology
Blasting dust
Dust concentration
Gray value
