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回柱放顶作业,是我国煤矿井下回采工作中的主要环节之一。就目前而言,其回柱放顶方法有人工和机械回柱之别。前者是利用手摇回柱机进行,后者则借助于回柱绞车。由于人工回柱法有劳动强度大、效率低、不安全等缺点,故机械回柱法得到了极广泛的应用。机械回柱法是提高坑柱回收率的重要措施,也是影响循环工作正常进行和提高劳动生产率的重要因素。为适应我国煤矿建设的发展需要,一机部一九七四年曾颁布了“回柱绞车参数系列”标准《JB1409—74》,但对标准中规定的钢丝绳最大静拉力的理解等问题,目前尚有争议,现就此问题谈几点浅见,与有关同志商榷。一、钢丝绳最大静拉力“回柱绞车参数系列”标准中规定了钢丝绳最大静拉力项值,但对所需电动机容量并未作具体规定,其原因在于标准审查时意见不完全一致,故未纳入标准,其争论焦点是:(a)、一种意见认为:标准中已载明的
Back to the column roof operation, is China’s coal mine back to work one of the main aspects. For now, the back-column roofing method has artificial and mechanical back columns. The former is the use of hand-cranked column machine, while the latter by virtue of the column winch. Due to the manual back column method has the disadvantages of large labor intensity, low efficiency and insecurity, the mechanical back column method has been widely used. Mechanical back-column method is to improve the pit column recovery rate of important measures, but also affect the normal cycle of work and improve labor productivity an important factor. In order to meet the development needs of coal mine construction in our country, a machine department promulgated the “JB1409-74” standard of “pillar winch parameters series” in 1974, but it understands the maximum static tension of wire rope specified in the standard, There is still controversy. We should now make a few humble opinions on this issue and hold discussions with the relevant comrades. First, the maximum static tensile wire rope “Return column winch parameter series” provides the maximum static rope tension item value, but the motor capacity is not required for specific provisions, the reason is that the standard review of opinions is not exactly the same, it is not included Standards, the focus of their debate is: (a), a view that: the standard has been set out