【摘要】 基于华亭煤矿250102综放工作面冲击地压显现强烈、巷道返修难度大,开展了一系列技术研究和防治实践。分析表明,大采深、煤层具有冲击倾向性、坚硬厚层砂岩顶板、护巷煤柱留宽不合理是导致该工作面发生冲击地压的主要因素,并采用综合指数法判定该综放面冲击危险指数0.89,具有强冲击地压危险性。在早期预测的基础上,采用微震法对冲击危险区域进行监测。对具备冲击危险的区域,综合采用巷帮煤体卸压爆破、顶板深孔爆破、动压注水(8~13 MPa)与静压注水等卸压解危措施,削弱了冲击地压显现强度,有效降低了综放工作面冲击地压的发生。更多还原

【Abstract】 According to the serious mine pressure bumping,gateway repair difficulty and other production problems of No.250102 fully mechanized top coal caving mining face in Huating Mine,a series technical research and the prevention and control practices was conducted.The analysis showed that the deep mining depth,seam with pressure bumping tendency,hard and thick sandstone roof and irrational width of the gateway coal pillars would be main influence factors to cause the pressure bumping in the coal mining face.The comprehensive index was applied to judge the pressure bumping danger index as 0.89 of the fully mechanized top coal caving mining face and the mining face would have a strong pressure bumping danger.Based on the early prediction,the micro seismic method was applied to monitor and measure the bumping danger zone.As for the bumping danger zone,the pressure releasing blasting in the gateway side wall,deep borehole blasting in the roof,dynamic water injection(8~13 MPa) and static water injection as well as other pressure releasing and danger control measures were comprehensively applied to reduce the mine pressure bumping behavior strength and to effectively reduce the pressure bumping occurred in the fully mechanized top coal caving mining face.更多还原