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为准确考察地面钻孔抽采煤层卸压瓦斯的影响范围,为合理布置地面钻孔提供可靠依据。通过相似模拟实验研究了沿工作面倾向方向在13-1#煤层中应力分布情况,基于示踪技术综合考察和得出了地面钻孔抽采卸压瓦斯影响范围。结果表明:在保护层开采条件下北中央3采区地面钻孔抽采范围在倾斜方向在160 m以上,在走向方向上在240 m以上。
In order to accurately investigate the influence range of the pressure relief coal seam grouted by ground drilling, it provides a reliable basis for the reasonable layout of the ground borehole. The stress distribution along the working face in direction 13-1 # coal seam was studied through similar simulation experiments. Based on the comprehensive investigation of the tracer technology, the influence range of relief pressure gas drainage by surface drilling was obtained. The results show that the ground drilling area in No.3 mining area under the condition of protective layer mining is more than 160 m in slope direction and more than 240 m in strike direction.