论文部分内容阅读
建国以后,我国的采煤方法经过重大改革,普遍推行长壁后退式采煤法,对加快煤炭生产,提高矿井技术经济指标起到积极促进作用,也为采煤机械化创造了条件。五十年代开始使用截煤机和联合采煤机,发展到六十年代采用滚筒式采煤机和刨煤机。五十、六十年代,采煤机械化虽有了大的发展,但总的来说,采煤机械化的水平还不高,回采推进速度也较慢,后退式采煤法具有明显的适应性。但七十年代以来,随着采煤机械化水平的不断提高,特别是综采的大力发展,后退式采煤法就显得难以适应了。因为综采工作面推进速度较快,月进一般都在80～100m,最高达120m 以上,赶上或超
After the founding of the People’s Republic of China, China’s coal mining methods have undergone major reforms and the long-wall retrogressive coal mining law has been widely implemented. This has played a positive role in accelerating coal production and raising the technical and economic indicators of mines. It has also created the conditions for coal mechanization. In the 1950s, the use of coal cutters and coal-mining machines began to develop into drum drum shearers and plows in the 1960s. In 1950s and 1960s, despite the great development of mechanization of coal mining, in general, the level of mechanization of coal mining is not high and the recovery speed of mining is also slow. The backward coal mining method has obvious adaptability. However, since the seventies, with the continuous improvement of mechanization of coal mining, especially the vigorous development of fully mechanized coal mining, the backward coal mining method appears to be difficult to adapt. Because of fully mechanized coal mining face to promote faster, generally into the 80 ~ 100m, up to 120m or more, to catch or super