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Phoenix Mountain Mine comprehensive excavation face dust Experimental Study on Comprehensive


Face head-on distance can be adjusted in 2-3m. 3.2.2 Integrated digging out from the fan face head-on the distance from the face of the fan out of style too far away, fans will inevitably lead to increased drag, decreased the amount of suction, so that fans can not be completely air suction face of the dust people filter purification, increasing the concentration of dust leading to the face; fan from the face too close, although inhalation of dust can be a good filter, but the fans and filter moving more frequently, increasing the labor strength. In the exhaust fan from the face 60mg. 1: With the constant face forward, face different distances from the exhaust fan, the driver location, boring machine 10rll and dust at the outlet after 5rll, the concentration of dust and exhaust fan points out the changes in wind Table 2. · 23.2 OO7 February 34 Mining Safety and Environmental Protection, No. 1 according to Phoenix Mountain comprehensive excavation surface coal 92311 actual situation and the type fan out from the comprehensive range of test excavation face head-on can be seen, the use of wet spin flow filter with 2 × 15kW fan of rotating out of style with the use of effective ventilation can range up to 150m. When the draw-out head 60-151m away from the fan when the comprehensive dust control measures taken to achieve the effect relative to the best of dust; integrated excavator driver at the location (distance of about 5m at the heading face), after the 10m at the boring machine, filter out 5m at the outlet after each point, the average dust concentrations were 54.4,replica oakley sunglasses,48.1,43.1 IIlg,. 4 Conclusions 1) test the use of airborne pressurization device, the boring machine's cooling water pressure after a high-pressure water cutting machine used to dig the first integrated high-pressure spray dust, pressurized device dimensions small, spray performance parameters to meet fog, dust, even more boring machine is suitable for on-board installation, use and maintenance more convenient. In actual use, the boring machine to ensure that drivers can more clearly see the cutting head, and can effectively control the dust spreads out, the airborne pressurization device outlet pressure transferred to 4-5MPa appropriate. 2) The trial excavation for the No. 9 coal face highly integrated low cross-section of small features and comprehensive excavation face of the actual situation, wet cyclone dust collector with 2 × 15kW fan of rotating out of style with the use of effective ventilation can distance up to 150m. Pressure from human-type outlet duct comprehensive excavation face head-on 20-30m, suction outlet duct from the comprehensive excavation face head-on 2-3m and dust from the comprehensive excavation face head-on 60-150m, and take a comprehensive dust measures to achieve the effect relative to the best of dust; integrated excavator driver at the location (distance of about 5m at the heading face), after the 10m at the boring machine, after the dust outlet 5m at each point, the average dust concentrations were 54.4 ,ed hardy uk, 48.1,43.1 I, greatly reducing the face and roadway dust concentration, improve the operating environment of labor sanitation. (Editor: Lvjin Ying) (on the first page 2l) 3 Conclusions and recommendations of the curve in case of recycling the plastic hysteresis loop was the result of the above, because its essence is different saturation changed the internal structure of sandstone. Water from the specimen surface cracks into the rock inside, due to saturation is different in different degrees of freedom wetting the surface of mineral particles, water molecules added to change the physical state of rocks, due to the dissolution of water molecules, so that mineral weakened the link between the particles, bond strength decreased,Beats By Dre Headphones, so that the compressive strength of sandstone lower. Experiments show that the maximum compressive strength of dried specimens, the compressive strength of saturated specimens minimum; it reveals and proves that as saturation increases, decreasing the strength of sandstone nature of the law. The test selected saturation line is not perfect, leading to less than ideal results. You can then select the appropriate number of saturation parameters 24 * repeated test in order to derive better results. References:. [1] Mei-Feng Cai, where lower-ranking, Liu Dongyan. Rock Mechanics and Engineering [M]. [Publisher ominous]: Science Press, 2OO2. [2] Jiang Xu, Cheng Bao-mediated large for a long time, fresh Xuefu. Cyclic loading of a three-city project andesite deformation characteristics [J]. Chongqing University: Natural Science,######## oakley sunglasses, 2OO8, 23 (6) :38-41. [3] Ge Xiurun, Jiang Yu, Lu Yunde. Cycle fatigue loads, cross-shaped rock Experimental Study [J]. Rock Mechanics and Engineering, 2OO8, 22 (10) :1581-1585. [4] Chen Yunping,ed hardy canada, I said Ying, Xue Yanwei. Saturated rocks under cyclic loading due to dynamic stress response [J]. Oil Geophysical Prospecting, 2OO8, 38 (4) :409-415. (Editor: Wei-Rong)
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