西德缓倾斜薄煤层的开采日益显得重要。就煤层的厚度而言,其储量及其产量的分布状况,近些年来发生了一系列的变化。煤层的开采一直集中在能较好发挥技术水平的中厚煤层上,这种煤层厚度对产量的影响程度远大于可采储量的影响。因此,必须推广使用那些在地质条件适宜的薄煤层中已获得效果的技术和方法。 1974年以前,单体支柱、垛式和节式支架一直是长壁工作面中唯一应用的支护设备。但是随着这几种支护设备的使用,暴露出来的问题日益增加,达不到所要求的生产效率和经济效益。上述支护设备暴露出来的缺点大致有以下几个方面。 The mining of gently inclined thin seam in West Germany is increasingly important. In terms of the thickness of the coal seam, the distribution of its reserves and its production has undergone a series of changes in recent years. Coal mining has been concentrated in the middle-thick coal seam, which can exert better technical skills. The influence of coal seam thickness on the output is far greater than that of recoverable reserves. Therefore, it is necessary to promote the use of technologies and methods that have achieved effects in thin seam with suitable geological conditions. Until 1974, monolithic pillars, pallets, and knuckle brackets had been the only support equipment used in longwall work. However, with the use of these types of support equipment, the problems exposed are increasing, failing to achieve the required production efficiency and economic benefits. The above support equipment exposed the shortcomings of the following general aspects.