科研之友
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摘要
In China, coal seams are divided in accordance with the degree of their inclination and called the almost flat seam, the gently inclined seam, the inclined seam and the steeply inclined seam with inclination angles smaller than 8°, ranging from 8° to 25°, ranging from 25° to 45° and greater than 45° respectively. According to their thickness, coal seams can also be divided into thin, thin-to-thick and thick ones with the thicknesses of being less than 1.3 m, I.3-3.5 m and 3.5m respectively. In recent years, with coal working increasingly mechanized, especially with the successful development of the apparatus for working in steeply inclined seams, the development of mechanized working technology is prompted for the comprehensively mechanized working in steeply inclined seams. In this aspect, the Hongling Coal Mine in Shenyang, and the Lvshuidong Coal Mine in Huayingshan are pioneers in opening comprehensively mechanized working face in steeply inclined coal seams. The Tangshan Coal Mine in Kailuan and the Zhangshuanglou Coal Mine in Xuzhou have made great achievements in opening comprehensively mechanized working faces in steeply inclined coal seams. All this points to the fact that it is mature to apply the long wall mechanized working technology in coal seams with the inclination angle smaller than 35 degrees. In addition, experiments have been successfully conducted trying to apply comprehensively mechanized working technology in coal seams with inclination angles ranging from 35 to 45 degrees. However, the key technology fails the application of the comprehensively mechanized working technology in the seams with an inclination angle greater than 45 degrees. Against the above-mentioned background, the present paper aims at introducing our recent researches on the possible application of comprehensively mechanized technology and techniques in coal seams with an inclination angle greater than 45 degrees in Huainan mining area. Rich in coal reserves, Huainan and Huaibei mining areas are the largest and the last remaining mining area in East China, with the identified coal reserves amounting to 22.69 billion tonnes, of which the reserves with an inclination angle greater than 45 degrees amount to 0.913 billion tonnes. The reserves are mainly distributed under the ground in areas where Xizhuangzi, Pansan, Lizuizi, Panbei, Xijier and Xijisan mines are located. Our project consists of researches on the application of the hydraulic support, the shearer and conveyor in coal seams with an inclination angles ranging from 35 to 72 degrees with the maximum being 72 degrees, an inclination angle for the remaining coal seams locally found in the 3232(3) working face in Lizuizi mine after the preliminary working. The comprehensively mechanized long-wall working technology under study can appropriately applied in coal seams of 2.2-3.5 m in height, with the average working height of 2.8-3.0 m. Aiming at finding a solution to the working problems encountered in the steeply inclined coal seams in Huainan mining area, our research is characterized by the innovative application of comprehensively mechanized working technology in steeply inclined coal seams, with safe production and efficient working ensured. After a short period of trial application, the integrated apparatus and technology are now applied in 6 working faces located in 4 coal mines in Huainan and Huaibei mining areas, and what we have done can be regarded as a technological invention for coal working which will ensure the safe and efficient working in East China with an annual production capacity amounting to 100 million tonnes.
- 出版日期2013
- 单位安徽大学
