大安山煤矿急倾斜煤层柔性掩护支架采煤法优化研究

Optimization of Flexible Shield Supports Mining Method for Steeply Coal Seam in Daanshan Colliery

为了提高急倾斜煤层柔性掩护支架采煤法的开采效率,结合大安山煤矿开采实践对急倾斜煤层柔性掩护支架采煤法进行了优化研究。通过分析大安山煤矿柔性掩护支架采煤法"台炮工艺"的开采特点及其适应性,提出了大安山煤矿柔性掩护支架采煤法的优化方案。方案主要从柔性掩护支架采煤法的巷道布置和爆破工艺2方面进行了优化。将柔性掩护支架采煤法回采巷道的伪斜角从23°增加到28°,将柔性掩护支架采煤法的"台炮爆破工艺"设计为"排炮爆破工艺"。优化后的柔性掩护支架采煤法减少了斜坡掘进工程量,增加了斜坡及工作面煤炭的自溜能力,提高了工作面的爆破效率和开采效率。

With the demand for coal increasing,it is necessary to mine the steeply coal seams.The flexible shield supports mining method is a safe and efficient mining method for the steeply coal seams.It was first time employed in Huainan mining district in the 1970s.The flexible shield supports method is optimized on the basis of practices in Daanshan colliery for improving the work efficiency of steeply coal seam.The flexible shield supports method is optimized mainly on the entry layout and winning technology in order to improve the security,yield,and work efficiency by analyzing the distinctive features and adaptability of flexible shield supports method in Daanshan colliery.The mainly optimization contents include the entry layout and the coal breaking technology.One is increasing the angle of working face and changing mining traffic road from 23° to 28°;and the other is transforming from bench blasting technology to piecewise blasting technology.The advantages of the optimized flexible shield supports method are that the slope development length and the post-blasting blockage probability of the working face are reduced,transportation capacity is increased at the working face and slope,and the efficiency is improved.