Y型通风方式下瓦斯分布规律及治理技术研究  

Study on gas distribution law and treatment technology under Y-type ventilation

作　　者：张峰华 ZHANG Feng-hua(Xinzhi Coal Mine,Huozhou Coal Power Group Co.,LTD.,Linfen,Shanxi 031412,China)

机构地区：[1]霍州煤电集团有限责任公司辛置煤矿,山西临汾031412

出　　处：《煤炭加工与综合利用》2024年第5期92-97,共6页Coal Processing & Comprehensive Utilization

摘　　要：在保护层开采条件下,受裂隙和卸压影响,相邻煤层瓦斯涌入保护层造成瓦斯超限,容易出现安全事故。为研究辛置煤矿架后采空区和回风隅角瓦斯治理技术,采用沿空留巷Y型通风方式,结合数值模型模拟,揭示瓦斯浓度分布规律,确定抽采过程中容易聚集瓦斯的区域,提出Y型通风下采空区埋管瓦斯抽采技术,并优化技术参数。现场试验结果表明:架后采空区和回风隅角瓦斯浓度分别下降了73%、64.6%;瓦斯浓度稳定保持在安全值范围内,主、辅进风巷的平均供风总量降低了182 m^(3)/min,抽采结果较为显著,有效提高了开采速率、降低了企业生产成本。Under the mining conditions of the protective layer,the adjacent coal seam rushes into the protective layer due to the influence of cracks and pressure relief,resulting in gas overflow and safety accidents.In order to study the gas treatment technology of goaf and return air corner after the coal mine frame is installed,the Y-type ventilation mode along the goaf is adopted,combined with numerical model simulation,to reveal the gas concentration distribution law,determine the area prone to gas accumulation during the extraction process,and put forward the buried pipe gas extraction technology of goaf under Y-type ventilation,and optimize the technical parameters.The field test results show that the gas concentration in the goaf and return air corner after the frame is reduced by 73%and 64.6%respectively.The gas concentration remained stable within the safe value range,the average total air supply of the main and auxiliary air inlet lanes decreased by 182m^(3)/min,and the extraction results were significant,effectively improving the mining rate and reducing enterprise costs.

关 键 词：瓦斯超限 沿空留巷 埋管瓦斯抽采 

分 类 号：TD712.6[矿业工程—矿井通风与安全]