碾焉煤矿8号煤层瓦斯抽采系统优化  

Optimization of Gas Extraction System in the No.8 Coal Seam of Nianyan Coal Mine

作　　者：孙佳磊 Sun Jialei(China Coal Science and Engineering Group Shenyang Research Institute Co.,Ltd.,Liaoning Fushun 113122;National Key Laboratory of Coal Mine Disaster Prevention and Control,Liaoning Fushun 113122;Coal Mine Fire Disaster and Gas Prevention and Control,Key Laboratory of National Mine Safety Supervision Bureau,Liaoning Fushun 113122)

机构地区：[1]中煤科工集团沈阳研究院有限公司,辽宁抚顺113122 [2]煤矿灾害防控全国重点实验室,辽宁抚顺113122 [3]煤矿火灾及瓦斯防控国家矿山安全监察局重点实验室,辽宁抚顺113122

出　　处：《山东煤炭科技》2024年第7期77-82,共6页Shandong Coal Science and Technology

摘　　要：为了降低矿井巷道掘进工作量,提高资源的回收率,碾焉煤矿8号煤层采用了沿空留巷的采煤技术方法,相较于传统采煤工艺其瓦斯运移规律有所不同。为了解决新的采煤方法所带来的瓦斯灾害问题,针对邻近层瓦斯涌出量较大的问题,通过对回采工作面采出后上覆岩层“三带”分布特征分析,提出利用高位钻孔抽采邻近层瓦斯,通过现场试验确定了抽采钻孔施工的相关参数,同时优化了新、老采空区瓦斯抽采方法及技术参数。通过现场试验8103工作面邻近层瓦斯采用高位钻孔抽采后抽采量为12.39 m^(3)/min,采用现采空区插管法抽采后现采空区抽采量为15.77 m^(3)/min,回采工作面瓦斯抽采率为57.15%。抽采优化研究提高了碾焉煤矿8号煤层瓦斯抽采效率,抽采效果及抽采浓度均达到预期效果。In order to reduce the workload of mine roadway excavation and improve the resource recovery rate,the No.8 coal seam of Nianyan Coal Mine adopts the coal mining technology method of retaining roadway along goaf,which has a different gas migration law compared to traditional coal mining technique.In order to solve the problem of gas disasters caused by the new coal mining method,and to address the problem of large gas emissions from adjacent layers,through analyzing the distribution characteristics of the"three zones"of the overlying rock strata after mining in the stoping working face,it is proposed to use high position drilling to extract gas from adjacent layers.The relevant parameters of the extraction drilling construction are determined through on-site experiments,and the gas extraction methods and technical parameters in the new and old goaf are optimized at the same time.Through on-site testing,the gas extraction volume of the adjacent layer of the No.8 coal seam is 12.39 m^(3)/min after using high position drilling extraction,and after extracting by using the current goaf intubation method,the current goaf extraction volume is 15.77 m^(3)/min,the gas extraction rate of the stoping working face is 57.15%.The study of extraction optimization improves the gas extraction efficiency of the No.8 coal seam in Nianyan Coal Mine,and the extraction effect and extraction concentration achieve the expected effects.

关 键 词：瓦斯抽采 邻近层 高位钻孔 采空区 插管抽采 

分 类 号：TD712.6[矿业工程—矿井通风与安全]