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长期以来,煤矿都是按保守的强度公式来设计煤柱尺寸的。过大的煤柱影响机械化生产、缩短矿井寿命。 一些小煤矿根据经验进行了小煤柱实验,小煤柱比用强度公式确定的尺寸要小得多。事实说明需要用新的观点来设计煤柱。现分析实例来说明这种观点。 下图为一个采区的部分区段布置,煤厚1.3米,上覆盖层均匀,厚64米。 靠近这个区段中心有一座房子,其下进行房柱
For a long time, coal mines have designed pillar sizes based on conservative strength formulas. Too large pillars affect mechanized production and shorten mine life. Some small coal mines experimentally conducted experiments on small coal pillars. The size of small coal pillars is much smaller than that determined by the strength formula. Facts show the need to use new ideas to design pillars. Now analyze the examples to illustrate this point of view. The picture below shows the layout of a section of a mining area with a coal thickness of 1.3 meters and a uniform overburden of 64 meters. There is a house near the center of this section, under which there is a post