降低矿井技术改造费用的途径

Approach for lowering the cost for mine technical reconstruction

实践表明,对生产矿井进行技术改造是以较少的投资取得较大经济效益的重要途径。我国从七十年代开始进行较大规模的矿井技术改造以来,采用了以采、掘、运为中心的新技术、新工艺、新装备,使矿井生产高度集中;机械化水平不断提高;产量增长大于新建井(1975～1980年占增产量的70％);投资小于新建井(约1/2～1/3);工期短于新建井(约1/2～2/5)。但是,并不是所有技术改造的矿井都能取得预期的经济效果。

the approaches tor improving economic effectiveness of reconstruction are to reduce investment for capital construction and to increase, △s, the difference of yearly income before and after reconstruction. The ways for reducing capital construction are: concentration of mine productions increased face output; reduced number of coal face; less volume of development in rock and more in coal; lowering the ratio of rock roadways in the total footage of openings; and replacement of existing equipment with new ones. Ways for increasing the difference of yearly income are: correct selection of reconstruction Soheme; settlement of contradictions between econstruction and production and further processing of raw coal.