多排式集束钻孔区域拦截硫化氢效果分析及评价
Analysis and Evaluation of Hydrogen Sulfide Interception in Multi-row Cluster Drilling Area
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摘要: 针对回采工作面割煤时硫化氢大量涌出问题,采取工作面迎头设计并施工多排式集束钻孔并注碱液进行拦截,相邻区域之间设置适当的超前距,多排式拦截钻孔形成3排硫化氢拦截区域,碱液和煤体中吸附的硫化氢气体反应后,能起到提前拦截硫化氢的作用,使得煤体中的硫化氢在割煤前提前被碱液吸收,从而减小割煤期间硫化氢的涌出。实践表明施工多排式集束钻孔起到了拦截硫化氢的作用,回风巷巷口硫化氢平均浓度降低比例为61.32%。Abstract: In view of the problem of the large amount of hydrogen sulfide emitted during coal cutting in the stoping face, the working face is designed and constructed with multi-row cluster drilling and alkali injection for interception, and appropriate lead distance is set between adjacent areas, and multi-row intercepting boreholes are formed to form 3 rows of hydrogen sulfide intercepting areas. After the reaction between lye and the adsorbed hydrogen sulfide gas in the coal body, it can intercept the hydrogen sulfide in advance, so that the hydrogen sulfide in the coal body can be absorbed by the lye before the coal cutting, thus reducing the emission of hydrogen sulfide during the coal cutting. Practice shows that the multi-row cluster drilling has the function of intercepting hydrogen sulfide. The average concentration of hydrogen sulfide in the return airway is reduced by 61.32%.
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