1、 第124页翻译部分英文原文Backlling technology and strata behaviors in fully mechanized coal mining working faceZhang Qiang, Zhang Jixiong, Huang Yanli, Ju FengA、School of Mines, China University of Mining & Technology, Xuzhou 221116, ChinaB、State Key Laboratory of Coal Resources & Mine Safety, Xuzhou 221008, C
2、hinaAbstract:Based on the principle of fully mechanized backlling and coal mining technology and combined with theXingtai Coal Mine conditions, we mainly optimized the coal mining equipment and adjusted the coalmining method in the Xingtai Coal Mine 7606 working face for implementation this technolo
3、gy. Firstly,we dene the practical backlling process as the (from backlling scraper conveyors) head to tail back-lling, step by step swinging up of the tamping arm, gradual compacting, moving formed backlling scra-per conveyor when the second tamping arm cannot pass and connecting the immediate roof
4、by back material push front material movement. Meanwhile, the stress changes of backll body in coal minedout area was monitored by stress sensors, and the roof caving law was analyzed by monitoring thedynamic subsidence of 210 west roadway of this face. The site tests results show that using this ne
5、w backlling and coal mining integrated technology, the production capacity in the 7606 working facecan reach to 283,000 ton a year, and 282,000 ton of solid materials (waste andy ash) is backlled, which meets the needs of high production and efciency. The goaf was compactly backlled with solid mater
6、ial and the strata behavior was quite desirable, with an actual maximum vertical stress of the backll body of 5.5 MPa. Backll body control the movement of overburden within a certain range, and there is no col- lapses of major areas in the overlying strata upon backlled gob. The maximum subsidence a
7、nd speed were 231 mm and 15.75 mm/d respectively, which proved the practical signicance of this integrated technology.Keywords:Fully mechanized backlling and coal mining technology，Hydraulic support，Formed backlling scraper conveyor，Backlling technology，Strata behaviors1. IntroductionChinas economy
8、is continuously depending on the coal energy.The coal production in China has increased rapidly in recent years,however, the other resources and environment are affected seri-ously. As an example, coal waste is a kind of solid waste discharged from coal exploitation and preparation. This waste pile
9、on the sur-face and form waste dumps over the time. According to the partial estimates, there is about 4.5 billion tons of waste rock piled on the surface in China, and about 15,000 hectares of land are occupied.There are 1600 comparatively large waste rock dumps, and the piled waste is increasing a
10、t a speed of 0.150.20 billion tons a year.Waste dumps have not only occupied too much land, polluted the air, soils and underground water around them, but also have caused potential dangers, such as landslide, spontaneous combus-tion and explosion. So it is a severe threat to the peoples health and
11、environment in mining districts.If the condition is such that the roof will not cave or subsidence to the surface is not allowable, it will be necessary to backll the void with materials such as sand, waste from coal-preparation plants, or y ash. Owing to technical and environmental reasons,backllin
12、g is practiced in many mining countries (e.g., Poland,India), but the unit cost of coal mining is much higher with backlling.Up to date, there are three main mature backlling technologies in China which are; super high-water packing material backlling,paste backlling and solid material fully mechani
13、zed backlling coal mining technology 1. Some literatures studied the experi-ments and applications of super high-water packing material. Some articles studied mining method and coal winning tech-nology of paste backlling. Zhang et al. studied the strata pressure behavior of raw waste backlling with
14、fully-mechanized coal mining technology. As a new backll technology in coalmine, the solid material fully mechanized backlling coal mining technology is developing day by day.This technology has been applied in Xingtai Coal Mine, Jining No. 3 Coal Mine in China. Its applications have conrmed distinc
15、-tive advantages on extracting coal under water bodies, railway lines and buildings and controlling the surface subsidence.This is its major difference compared with traditional fully mechanized coal mining methods. To the best of our knowledge, there are sel-dom researches on backlling and coal min
16、ing technology. This article mainly introduces this technology from the above two points based on the mining conditions of Xingtai Coal Mine.2. Basic principles of fully mechanized backlling miningIn fully mechanized backlling mining, we usually use waste rock, y ash and other solid materials as the backll materials.We use the vertical continuous conveyor system to transport such s
