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针对新河矿5301掘进面冲击危险性高的问题,分析了诱发掘进面冲击地压的主控因素,计算出了主控因素下煤体的应力集中系数,并建立应力集中系数与煤体冲击程度的关系。提出了用综合应力集中系数K评价掘进面冲击程度的方法,根据评价标准将掘进面划分出11个冲击危险区,并对危险区实施了煤层注水和大直径卸压钻孔,避免了掘进面发生冲击灾害。
In view of the high impact risk of excavation face of 5301 in Xinhe Mine, the main controlling factors of induced ground pressure on excavating face are analyzed, the stress concentration coefficient of coal body under main control factor is calculated, and the stress concentration coefficient and coal mass impact Degree of relationship. The method of evaluating the impact degree of excavation surface by using comprehensive stress concentration coefficient K is proposed. According to the evaluation criteria, the excavation area is divided into 11 impact danger zones, and the coal seam water injection and large diameter pressure relief drilling are implemented in the danger zone, An impact disaster occurs.