平煤天安十矿二2煤层24080工作面瓦斯可抽采性分析  

Analysis on Gas Extraction Feasibility of 24080 Working Face of No.2 Coal Seam in No.10 Mine of Pingmei Tianan Coal Mining Company

作　　者：张孟浩 乔伟 薛凯隆 寇杰 ZHANG Menghao;QIAO Wei;XUE Kailong;KOU Jie(College of Coal Engineering,Shanxi Datong University,Datong 037003,China)

机构地区：[1]山西大同大学煤炭工程学院,山西大同037003

出　　处：《山西煤炭》2023年第4期41-45,52,共6页Shanxi Coal

基　　金：山西大同大学博士启动金资助项目(2020-B-18,2020-B-08);国家自然科学基金资助项目(51274113);国家重点研发计划重点专项资助项目(2018YFC0807900)。

摘　　要：针对煤矿瓦斯抽采难度大以及瓦斯抽采的可行性未知问题,以平煤天安十矿二2煤层24080工作面的实际工程地质情况作为研究背景,基于矿井瓦斯超限防治理论,综合运用试验分析、理论分析、对比分析、实际应用相结合的研究方法。通过测定计算,分别得到24080工作面煤层瓦斯含量、瓦斯压力、瓦斯相对涌出量、煤层透气性系数、钻孔瓦斯衰减系数等相关煤层瓦斯参数,综合分析该煤层的瓦斯抽采可能性。结果表明:十矿二2煤层24080工作面平均瓦斯压力为1.07 MPa,大于0.74 MPa的安全临界标准,对其进行瓦斯抽采十分必要;通过测定计算得知煤层瓦斯相对涌出量达37.67 m^(3)/t,煤层透气性系数为2.09,钻孔瓦斯流量衰减系数为0.021 d^(-1),属于可抽采煤层。Aiming at the difficulty and unknown feasibility of gas extraction,this study takes the actual engineering and geological situation of 24080 working face in the No.2 coal seam of No.10 Mine of Pingdingshan Tianan Coal Company as the research background,adopts the preventive theory of gas overlimit,and synthesizes the research methods of the experimental analysis,theoretical analysis,comparative analysis,and practical application.Through measurement and calculation,we obtained relevant parameters of the coal seam,such as the gas content,gas pressure value,the relative gas emission,the permeability coefficient,and the gas attenuation coefficient of the boreholes,and finally analyzed the feasibility of gas extraction in this coal seam.The results show that the gas extraction is necessary due to 1.07 MPa of the average gas pressure of the 24080 working face,greater than the safety critical standard of 0.74 MPa;the gas extraction is feasible due to the calculation results:37.67 m^(3)/t of the relative gas emission,2.09 of the permeability coefficient,and 0.021 d^(-1)of the attenuation coefficient of the gas flow through the boreholes.

关 键 词：瓦斯抽采 煤层瓦斯参数 线性拟合 可抽采煤层 

分 类 号：TD712[矿业工程—矿井通风与安全]