考虑煤体粒度的落煤瓦斯涌出预测模型研究  

Study on prediction model of gas emission in dropping coal considering coal particle size

作　　者：成小雨 龚选平 尉瑞 高涵 赵刚[1] CHENG Xiaoyu;GONG Xuanping;YU Rui;GAO Han;ZHAO Gang(China Coal Energy Research Institute Co.,Ltd.,Xi’an Shaanxi 710054,China;Wangjialing Branch of China Coal Huajin Group Co.,Ltd.,Yuncheng Shanxi 043300,China;School of Emergency Management and Safety Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)

机构地区：[1]中煤能源研究院有限责任公司,陕西西安710054 [2]中煤华晋集团有限公司王家岭分公司,山西运城043300 [3]中国矿业大学(北京)应急管理与安全工程学院,北京100083

出　　处：《中国安全生产科学技术》2022年第7期61-67,共7页Journal of Safety Science and Technology

基　　金：国家自然科学基金项目(51974161)。

摘　　要：为了探究不同煤体粒度对于工作面瓦斯涌出的影响规律,以王家岭煤矿为研究对象,通过现场测试分析采落煤与放落煤的粒度分布,采用数值模拟计算不同粒度煤体的瓦斯涌出特征;并推导采落煤和放落煤的瓦斯涌出预测模型,对模型进行现场应用。研究结果表明:王家岭煤矿采落煤粒度分布范围更广,存在较高比例的微小粒度和大粒度煤体;煤体粒度越小,则瓦斯涌出速度越快。采落煤和放落煤的综合涌出强度均可以用指数函数来描述,模型计算结果与现场实际数据误差在合理范围内。In order to explore the influence law of different coal particle sizes on the gas emission from working face,taking Wangjialing coal mine as the research object,the particle size distribution of mining coal and caving coal was analyzed by field test,and the gas emission characteristics of coal mass with different particle sizes were calculated by numerical simulation.A prediction model of gas emission for mining coal and caving coal was deduced,and the model was applied in the field.The results showed that the particle size of mining coal in Wangjialing coal mine was more widely distributed,and there was a higher proportion of small particle size and large particle size.The smaller the coal particle size,the faster the gas emission rate.Both the comprehensive emission intensities of mining coal and caving coal could be described by the exponential function,and the error between the model calculation results and the field actual data was within a reasonable range.

关 键 词：煤体粒度 瓦斯涌出 综放开采 暴露时间 

分 类 号：X936[环境科学与工程—安全科学] TD712[矿业工程—矿井通风与安全]