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On the quality of the coal enterprises to improve the way coal products


This 28 Hebei coal No. 3, 2004 where it is prone to cave, 1122 Transport Lane roof fall had occurred twice, 1124 Haul Road there was a cave, were squeezed due to fracture zones, each cave there are several lOt or even hundreds of tons of rock mixed with coal, which, to strengthen the roof management, strict control of all functions of the department,######## oakley sunglasses, to prevent the occurrence of roof fall, which ensure safety, but also to ensure the quality of coal. Often broken in the crush zone in the vicinity, as well as the formation of air oxidation of coal, this coal is of poor quality, high ash. 2 the impact of water on the coal analysis coal moisture is an important indicator, it will directly affect the coal is good or bad. Water including internal water and external moisture, water affects the production of coal in the external water, the actual production process, water is water and mine water, two kinds of dust. The impact of dust and water 2.1 (1) integrated excavator and Shearer in the course of operation, dust a large, according to the But also to reduce coal dust on the front-line health hazards of miners, digging machines and in integrated are installed on the shearer spray dust suppression equipment, water spray dust in the working process, affecting coal. (2) in the laneway to play anchor, anchor,MBTシューズ 販売店, in order to reduce the rock powder and coal dust, water spray rig in the construction dust, moisture of coal also increased. (3) reproduced the coal dust spray device has a point, affecting the coal. (4) gun safety tunnel dug with water curtain, the spray of water also affected to a lesser extent, coal moisture. 2.2 The impact of mine water from the first mining area Xingdong Mine hydrogeological point of view, the main impact of coal mine water is 2 coal-roof water sandstone, Permian sandstone Xiashihezi water and water main well bore. 2.2.1 boring stage in the process of excavation face 2 main effects of coal-water sandstone roof. The aquifer water reserves, based mainly on quiet,mulberry outlet, easy to dewatering, mainly to drop, water spray form into the roadway. When heading to the roof with a broken, fractured zone and fault zone,herve leger sale, the roof drops of water will increase leaching; and when the roof is good, but the period of the more water, the roof bolt hole (2.4m deep), anchor hole (6.Om D) became the two coal-water into the tunnel roof sandstone direct channel, which is bound to result in the improvement of coal moisture. Just when exposed to the aquifer. Larger amount of water, the future will gradually decrease, generally 5 ~ lOd dewatering, excavation of the aquifer when the normal water yield 5 ~ 10 / h, the maximum water yield 30 / h. In response to this situation, ① large amount of water in the section heading to the shower, in the appropriate place to dig nest safe pump drainage pump, the water is prohibited, regardless of coal, with Jincang; ② digging up the mountain, in case of a large amount of water leaching conditions, timely digging drainage ditches; ③ dig down, if a large amount of water leaching, and fallen to the pump and drain line boring, while excavation and row. 2.2.2 recovery phase face recovery process, 2. Permian sandstone roof water and coal Xiashihezi the combined effect of coal-water sandstone water. After a boring stage 2. Coal water sparse sandstone roof put, general to the recovery phase, the aquifer water is significantly reduced. Xiashihezi Permian sandstone aquifer as a major water-filled water, the aquifer is located 2. Coal-roof above the sandstone aquifer 20 ~ 30m, but also to the main static reserves. When the recovery after caving, caving crack the 2. Permian sandstone roof water and coal Xiashihezi old sandstone leaders with empty water from the air flow into the old face, with the face of the advance, the mined area increased, the face amount of water gradually increases. Face recovery to normal water inflow 15 ~ 20 / h, the maximum water yield for the 50 / h, when walking down the mountain face, the water will empty into the downpipe old road, if not before the first cut coal pumping, water will be directly mixed with coal,Beats By Dre Studio, This also improves the external moisture coal. Response is: the process of recovery in the face, the face downpipe Road safety a lower position after the pump, cutting coal before opening the pump pumping, the water is prohibited, regardless of coal, with Jincang, affecting coal. 2.2.3 upgrade phase, owing to construction of wells in the main well bore, the grouting is not very good at present, borehole water, 8 ~ 9 / h, so when the coal shaft in the promotion process will enter the water more or less skip, mixed with coal, the increase of coal moisture, thus affecting the coal. Recommended to mention the scientific coal skip closed during the promotion process to reduce the amount of water into the skip; section of the main well bore water for re-grouting sealing. Conclusion 3 is a measure of coal ash and moisture are two important indicators of quality in the production process, to do mine geology, depending on the circumstances, to strengthen management of coal, by all means reduce the coal ash and water, improve Coal brand benefits. Author: Zhang heap fork (1963 A), male, Hebei palace people, Xing Dong mine production geological engineer. (Received date :2004 -02-24; Editor: Liu elaborated words)
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