钻屑法测定煤层H_2S含量  

Determination of hydrogen sulfide content of coal by drilling cutting method

作　　者：梁冰[1,2] 袁欣鹏[1] 孙福玉[1,3] 姜福利[1,4] 孙维吉[2] 

机构地区：[1]辽宁工程技术大学矿业学院,辽宁阜新123000 [2]辽宁工程技术大学力学与工程学院,辽宁阜新123000 [3]山西保利铁新煤业有限公司,山西灵石031300 [4]越南广宁工业大学采矿系,广宁下龙200000

出　　处：《中国安全科学学报》2015年第2期101-105,共5页China Safety Science Journal

基　　金：大型油气田及煤层气开发国家重大专项(2011ZX05040-2);国家重点基础研究发展计划"973"基金资助(2011CB201206)

摘　　要：为了测定煤层硫化氢（H2S）含量，防治矿井H2S涌出，提出一种通过钻屑法测定煤层H2S含量的方法。在未受采动影响的新鲜煤壁，采用钻屑法取样，通过测定煤样H2S解吸量、取样过程损失量和H2S残存量确定煤层H2S含量。根据溶于水中H2S的pH值和色谱分析解吸气体中H2S体积分数，确定H2S解吸量；根据煤样解吸规律和气样H2S体积分数，确定H2S损失量；根据色谱分析残存气体中H2S体积分数，确定其残存量。用此方法，对山西某矿H2S涌出煤层进行现场和实验室测定。研究表明，该矿H2S含量为（4．465—6．701）×10^-3m^3／t。钻屑法测定煤层H2S含量是可行的，可以为矿井H2S治理提供基础数据。As hydrogen sulfide emission from coal seam has done great harm to the miners, the content of hydrogen sulfide must be determined in order to take effective control measures. Refered to gas content measurement method, a coal hydrogen sulfide content measurement method was worked out. Measurement principles are as follows： coal samples were taken by drilling cutting method from the newly exposed coal which was not affected by mining, the seam hydrogen sulfide content was determined by measuring the mass of the desorption of hydrogen sulfide, and the loss during the sampling and the remaining mass. The pH value was measured for the water in which H2S was solved and the hydrogen sulfide concentration in the desorbed gas was determined by using gas chromatographic method to define the mass of desorbed hydrogen sulfide. According to the coal desorption law and the H2S concentration of the desorbed gas of hydrogen sulfide gas sample, the loss mass of hydrogen sulfide was ascertained; the residual mass of H2S was determined by chromatography analysis. This method was applied to a certain coal seam having H2S emission problems in Shanxi province, China. The results show that the hydrogen sulfide content of the coal seam is （4.465 -6.701） × 10^-3 m^3/t.

关 键 词：煤层硫化氢(H2S)含量 测定原理 气相色谱分析 PH值 解吸 

分 类 号：X936[环境科学与工程—安全科学]