摘要
针对H2S在煤矿中难以治理的问题,通过数值仿真软件COMSOL Mutiphysics中以沙坪煤业13号煤层为原型建立三维模型,开展煤层注碱数值模拟研究,分析不同压力和孔数时碱液(Na_(2)CO_(3))与H2S的反应规律。结果表明,单孔注碱时随着时间的增长注碱影响范围越大,双孔注碱时随着注碱压力的增大,碱液的扩散范围也在逐渐增大。压力在4 MPa下,注碱48 h,单孔注碱最远达到6.4 m,双孔注碱最远达到9.8 m。在13号煤层现场应用中,现场采用多孔注碱方式,煤层注碱时的孔间距为8 m、注碱压力为4 MPa,证明模拟结果对实践应用有显著效果。
In view of the problem that H2S is difficult to control in coal mines,a three-dimensional model of No.13 coal seam in Shaping Coal Industry was established by numerical simulation software COMSOL Mutiphysics.The numerical simulation of coal seam alkali injection was carried out to analyze the reaction law of alkali solution(Na_(2)CO_(3))and H2S under different pressures and pore numbers.The results show that the influence range of alkali injection increases with the increase of time in single hole alkali injection,and the diffusion range of alkali solution increases with the increase of alkali injection pressure in double hole alkali injection.Under the pressure of 4 MPa,alkali injection for 48 h,single hole alkali injection up to 6.4 m,double hole alkali injection up to 9.8 m.In the field application of No.13 coal seam,the porous alkali injection method is used in the field.The pore spacing of the coal seam is 8 m and the alkali injection pressure is 4 MPa,which proves that the simulation results have remarkable effects on practical application.
作者
王武
Wang Wu(Shanxi Jinshen Shaping Coal Co.,Ltd.,Xinzhou 036500,China)
出处
《煤炭与化工》
CAS
2022年第11期108-113,共6页
Coal and Chemical Industry
关键词
硫化氢
煤层注碱
Na_(2)CO_(3)
单孔注碱
双孔注碱
hydrogen sulfide
coal seam alkali injection
Na_(2)CO_(3)
single hole alkali injection
double hole alkali injection
