一、简介 在实践经验的基础上产生新的构思,从而不断改进设计,进而研制出新的产品,这是新产品问世的一般规律。就此而论,重型掩护式液压支架的问世也不例外。 在英国,第一套全工作面掩护式液压支架投入井下使用,至今已历时八年了。这个工作面的全套掩护式液压支架的费用是由英国国家煤炭局在“先进采煤技术发展规划”的项目内予以支付的。后来的生产实践证明,这种支架是非常成功的,为此,国家煤炭局专门制定了“重型掩护式液压支架发展计划”。 First, the introduction On the basis of practical experience to produce new ideas, so as to continuously improve the design, and then develop new products, which is the general law of the advent of new products. In this connection, the emergence of heavy duty hydraulic support is no exception. In the UK, the first full-face hydraulic support has been put into use underground for eight years. The full cost of the covered hydraulic support for this facet is met by the UK National Coal Board within the project “Advanced Coal Technology Development Plan”. Later production practice proved that this bracket was very successful, therefore, the State Coal Administration specially formulated the “heavy-duty shelving hydraulic support development plan.”