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义马煤业集团孟津煤矿二2煤-11031工作面属于弱突出危险性煤层,为了提高11031工作面瓦斯的抽采效率,有效治理瓦斯问题,减少瓦斯事故的发生,对11031工作面实施顶板水力压裂的卸压强化增透措施。实施该措施后,煤层透气性大大增加,单孔瓦斯抽采体积分数和流量大幅提高,煤层瓦斯含量和瓦斯压力大幅降低,保证了该工作面及被保护层采掘工作的安全采掘。
Yima Coal Group Mengjin Coal Mine 2 2 Coal -11031 Face belongs to the weakly outburst dangerous coal seam. In order to improve the gas drainage efficiency of 11031 working face, effectively manage the gas problem and reduce the occurrence of gas accident, carry out roof hydraulic pressure on 11031 face Fracturing the pressure relief intensified penetration measures. After the implementation of this measure, the gas permeability of the coal seam greatly increases, the volume fraction and flow rate of single-hole gas drainage greatly increases, and the gas content and gas pressure of the coal seam are drastically reduced, thus ensuring the safe excavation of the working face and the mining of the protected layer.