Experimental Study On Light Transmission In Mine Production Environment

Lighting is necessary for mine production.However,with the economic construction and development of our country,energy consumption is increasing,the production capacity of the mine is increasing,and the mine environment is constantly deteriorating,which is easy to induce accidents.In order to reduce the occurrence of mine safety accidents and improve the efficiency of mine workers,it is very necessary to study the impact of mine environment on lighting.According to the similarity criterion,this paper establishes the experimental physical model of roadway,and makes theoretical and experimental research on the high temperature and high humidity environment,dust diffusion and light transmittance of fully mechanized excavation surface in mine.The following main results and conclusions were obtained:(1)This paper analyzes the principle of light attenuation in mine production environment(including refraction,absorption,transmission,reflection of light,etc.),uses the illumination meter to measure illumination,and uses the illumination ratio after incident to reflect the degree of light attenuation.(2)A simulation experiment platform is developed.The simulation platform is a horizontal roadway made of plexiglass with a length of 5 m,a width of 0.562 m and a height of 0.4 m.In order to create a uniform heating and humidifying environment,four heating and humidifying modules are arranged on the inner wall of the tunnel.The heating wire and humidifying pipe are evenly distributed in each module,the fluctuation of main factors in mine roadway is detected by TSI9535 hot wire anemometer on the exper imental platform,and the dust emission quantity of the horizontal plexiglass roadway experimental platform is obtained.Relative humidity and wind speed can create a stable and uniform mine production environment.The illuminance of light source in differe nt mine environment was measured by illuminance meter,and the experiment task was completed.Typical dust conditions are10g/min.,the experimental results show that the relationship between dust concentration C and wind speed V is similar to the parabolic curve equation C=0.2 0 8 V 2+1 9.8,and that the dust concentration in the simulated roadway is related to relative humidity when the dust emission is constant.When the dust emission is 10 g/min and the relative humidity increases from48%to 100%,the dust concentration increases from 21.54g/m~3 to 24.29g/m~3.(3)When the dust volume is 10g/min,the dust concentration in the experimental roadway increases with the increase of wind speed,and shows the parabolic distribution C=0.2 08 V ~2+1 9.8,the attenuation rate of four kinds of lamps are:23.2%fluorescent lamps,15.75%for gold halide lamps,12.8%for wearing led mine lamp and11.5%for household led lamp.The greater the amount of dust,the greater the impact of the control degree.Taking the typical working condition wind speed V=3m/s as an example,when the wind speed is 3m/s,the amount of dust increased from 0g/min to 15g/min,Dust concentration increased from 0 to 23.155g/m~3,fluorescent lamps,gold halide lamps,wearing led mining lights,household led lamps illumination attenuation percentage of 38.8%,35.9%,34.9%,29.2%,respectively,Four kinds of lamps illumination attenuation speed for fluorescent lamps>Gold halide lamps>head wearing LED miner lamp>household LED lights.(4)Compared with the dust concentration,the relative humidity has a greater influence on the illumination of four kinds of lamps.Compared with the relative humidity of 48%and95%,fluorescent lamps,gold halide lamps,head-wearing led mining lights,household led lamps illumination attenuation percentage of 50.63%,69.6%,98%,57.9%,illumination attenuation speed in turn for the head wearing led mining lamp>Gold halide lamp>household LED lamp>fluorescent lamps.