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随着煤炭科技的不断发展,采煤机械化程度不断提高,爆破落煤工作面逐渐减少。七台河局受地质条件的限制,炮采工作面个数仍占全局工作面总数的30％以上,特别是93~#90~#煤层,煤硬且夹矸厚均在20-40cm,不适应机械化采煤。自推广应用毫秒爆破技术以来,尽管提高了爆破速度,减少对顶板的破坏,但对爆破的参数没有进行合理确定,存在许多问题,这主要表现在: (1)经常打倒工作面支柱,既加大了顶板的管理难度,又降低了支柱的使用寿命,增加了采煤成本。(2)爆破抛人老塘的原煤多,增加了原煤丢失和清理原煤的工作量。(3)经常打坏刮板输送机。如何解决以上问题是炮采工作面提
With the continuous development of coal science and technology, coal mining mechanization continues to improve, blasting coal face gradually reduced. Qitaihe Bureau by the geological conditions, the number of mining face still occupy more than 30% of the total number of face, especially 93 ~ # 90 ~ # seam, coal hard and gangue thickness are 20-40cm, not Adapt to mechanized coal mining. Since the popularization and application of the millisecond blasting technology, although the blasting speed has been increased and the damage to the roof has been reduced, the parameters of the blasting have not been determined reasonably and there are many problems, which are mainly manifested in the following aspects: (1) Large roof management difficult, but also reduces the service life of pillars, increasing the cost of coal mining. (2) Blasting the raw coal thrown into Laotang increased the workload of losing and cleaning raw coal. (3) often damage the scraper conveyor. How to solve the above problem is blast mining face mention