某金矿有毒有害气体的来源、组成及影响因素分析

Research on Source and Composition of the Toxic and Harmful Gas and its Influence Factor in a Certain Gold Deposit

有毒有害气体是金矿主要危险源之一。通过对某金矿现场实测和调查,表明金矿有毒有害气体的主要成分是C、N、S的氧化物,主要来源是爆破产生的炮烟和无轨设备产生的尾气,主要影响因素因地点不同而存在差异。在采场和掘进巷道中,被截留在爆堆中的炮烟在通风结束后缓慢释放,会导致有害气体浓度短时间内积累,并达到较高浓度;在运输巷及斜坡道中,由于内燃机驱动的无轨设备较多,有害气体浓度主要受无轨设备数量、内燃机总功率大小及通风量等因素影响,波动较大,其中CO的浓度与通风量有较大关系。

The toxic and harmful gas is one of the main risk sources of gold mine.Through investigation,study and field measurement in a certain gold deposit,the composition of toxic and harmful gas is the oxides of C,N,S which mainly come from blasting fume and tail gas from trackless equipment.Their influence factors are different at different locations.The intercepted blasting fume releases slowly and results into high concentration of harmful gas within a short time in stope and tunneling.Due to numerous trackless equipment in transport roadway and ramps,the concentration of harmful gas is mainly affected by the quantity of trackless equipment,the total power of internal combustion engine,and ventilation volume.Among these,the concentration of CO has a great relationship with the ventilation volume.