铜坑矿细脉带特大事故隐患区环境监测与控制技术

Environmental Monitoring and Control Technology in Governing the Serious Accidents at the Veinlets of Tongkeng Mine

在铜坑细脉带特大事故隐患区治理过程中,采用甲醛溶液吸收—盐酸副玫瑰苯胺分光光度法与比长式检测管变色柱分析等方法,对有毒有害气体等环境因素进行了长期的跟踪监测。根据高斯扩散模式建立地表大气污染扩散模型,分别模拟计算铜坑矿塌陷坑SO2排放浓度。井下作业区空气中有毒有害气体均在安全允许浓度范围之内,氧的含量在20%以上,符合井下空气质量的要求。地表各监测点SO2监测值变化规律基本相同。生产生活区中,仅极个别天在距离塌陷区较近的长坡坑口出现SO2污染超标。通过实施地表覆盖工程和石灰水喷淋,有效地控制了SO2的排放。

During the process of controlling the serious accidents in veinlet of Tongkeng mine,the environmental factors of toxic and harmful gases have been made a long-term follow-up monitoring with the application of formaldehyde solution sampling-pararosanitine hydrocloride spectrophotometric analysis and tube column color analysis. Air pollution dispersion model is setup from Gaussian model, and SO2 emission concentration in Tongkeng caving pit are respectively siredated. The toxic and harmful gas in underground work zone are within a safe concentration range, and the oxygen content is more than 20%, that meet with the air quality requirements for underground mining. The change of SO2 concentration in each monitoring points on ground is basically the same. In working and living area, only a few days the SO2 concentration appear excessive pollution in Changpo mine which is close to the caving pit. The implementation of land covering and lime-water spray on ground is effectively controlled SO2 emissions in the caving pit.