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苏联莫斯科近郊煤炭科学研究所的试验结果表明,在莫斯科近郊矿区,综采设备有75%使用在底板承载力小于1～1.5MP_α的地质条件下。地质勘探的结果表明,新井和预计开采的煤层的底板大多是低承载能力的含水岩石,而顶板则是很厚的石灰岩和页岩层,以致在支架上形成很高的压力。在承载力小于1～1.5MP_α的底板条件下
According to the test results of the Institute of Coal Science in the suburbs of Moscow, Russia, 75% of the fully mechanized mining equipment is used in geological conditions with a floor carrying capacity of less than 1 ~ 1.5MP_α in the mining areas in the suburbs of Moscow. The results of the geological survey show that most of the floors of the new well and the coal seam to be mined are low-carrying, water-bearing rocks, whereas the roof is thick limestone and shale so that high pressure is built up on the support. In the bearing capacity of less than 1 ~ 1.5MP_α under the conditions of the floor