郭小铭, 郭康, 刘英锋. 深埋煤层开采顶板泥砂溃涌灾害多源信息评价[J]. 煤田地质与勘探, 2020, 48(1): 113-119,128. DOI: 10.3969/j.issn.1001-1986.2020.01.015
引用本文: 郭小铭, 郭康, 刘英锋. 深埋煤层开采顶板泥砂溃涌灾害多源信息评价[J]. 煤田地质与勘探, 2020, 48(1): 113-119,128. DOI: 10.3969/j.issn.1001-1986.2020.01.015
GUO Xiaoming, GUO Kang, LIU Yingfeng. Multi-source information evaluation of mud and sand inrush disaster during the mining of deep-buried coal seam[J]. COAL GEOLOGY & EXPLORATION, 2020, 48(1): 113-119,128. DOI: 10.3969/j.issn.1001-1986.2020.01.015
Citation: GUO Xiaoming, GUO Kang, LIU Yingfeng. Multi-source information evaluation of mud and sand inrush disaster during the mining of deep-buried coal seam[J]. COAL GEOLOGY & EXPLORATION, 2020, 48(1): 113-119,128. DOI: 10.3969/j.issn.1001-1986.2020.01.015

深埋煤层开采顶板泥砂溃涌灾害多源信息评价

Multi-source information evaluation of mud and sand inrush disaster during the mining of deep-buried coal seam

  • 摘要: 深埋煤层采场顶板泥砂溃涌灾害是由于泥岩顶板遇水发生松散崩解,在矿压作用下泥砂集中溃入井下的综合性灾害,其灾害发生受到含水层、矿山压力、地质构造等多因素影响。以黄陇煤田照金煤矿为研究区,在灾害发生机理研究的基础上,讨论了灾害发生的主要影响因子,最终选取洛河组含水层富水性、煤层到洛河组含水层距离、宜君组砾岩厚度、煤层上覆杂色泥岩厚度、煤层到杂色泥岩距离、单位面积断层密度、褶皱构造分布和煤层开采厚度8个主控因素,采用层次分析权重赋值方法,确定影响灾害发生的各主控因素权重,构建煤层顶板泥砂溃涌灾害危险性评价数学模型;绘制主控因素专题图并进行栅格赋值,通过信息融合叠加方法将各因素进行叠加,最终形成多源信息融合的照金煤矿煤层顶板泥砂溃涌灾害综合分区。研究结果表明,照金煤矿ZF202工作面所在区域该类灾害发生的危险性高,与实际开采过程中曾发生的“4·25”重大事故发生区域较为吻合,说明本次危险性评价模型构建合理,分区结果可用于指导矿井的开采布设与泥砂溃涌灾害防治。移动阅读

     

    Abstract: The mud and sand inrush disaster during the mining of deep-buried coal seam is caused by the disintegration of the mudstone in the coal seam roof when meeting water. It is a comprehensive disaster due to concentrated underground mud and sand gush under mine pressure. The occurrence of such disaster is affected by many factors, such as aquifer, mine pressure, and geological structure, etc. This paper took Zhaojin coal mine in Huanglong coalfield as the study area, and discussed the mechanism of the disaster. Then the main controlling factors were identified, including water yield property of Luohe Formation aquifer, distance between coal roof and Luohe Formation aquifer, thickness of conglomerate in Yijun Formation, thickness of variegated mudstone above the coal seam, distance between coal roof and variegated mudstone, fault density, distribution of fold, coal seam thickness. The analytic hierarchy process was used to determine the weights of the main controlling factors, and the mathematical model for the risk assessment of the mud and sand inrush disaster in the coal seam roof was constructed. Then the thematic map of the main control factors was drawn. Based on the information fusion method, the factors were superimposed, and finally the disaster integrated zoning method of multi-source information fusion was formed. The research results show that the risk of disaster occurrence of ZF202 working face is high, which is in conformity to the “4·25” major disaster, indicating that the risk assessment model is reasonable, and the zoning results can be used to guide mining of Zhaojin coal mine and prevention and control of mud and sand inrush disaster.

     

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