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为开发井下主要巷道构筑防火带的技术,受通产省立地公害局的委托,接收了这项研究,从1980年起在太平洋煤矿钏路矿务局开始进行了调查。六十年代初期矿井就采用了混凝土喷浆法。现在大部分矿井都使用了喷浆设备,开始在各种工程上采用覆盖法防止巷道火灾。但是,由于井下存在着巷道断面小、运输系统复杂、机械设备防爆等困难问题,喷浆法的效果不显著。为此,以提高喷浆施工法效率、改善施工质量为目标而着手了研究。在本文中仅就混凝土的骨料配给和过去实施改革的试验结果作一阐述。
For the development of the main underground roadway fire protection technology, commissioned by the Ministry of International Trade and pollution mitigation commission, received the study, from 1980 onwards Pacific Coal Mine Road Bureau of Mines began a survey. In the early 1960s, a concrete jetting method was used. Now most of the mines are using the shotcrete equipment, began to cover the use of various projects to prevent roadway fires. However, due to the underground tunnel there is a small section, the transport system is complex, explosion-proof mechanical equipment and other difficult problems, the effect of spraying method is not significant. To this end, in order to improve the efficiency of shotcrete construction method, improve the quality of construction as the goal and proceed with the study. In this paper, only the concrete aggregate distribution and the implementation of the reform in the past to make an elaboration of the test results.