超前阻化煤层可注性及阻化液注入效果研究
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摘要
为研究超前阻化煤层可注性及阻化液的注入效果,以南屯矿3上煤层为例,在试验分析该煤层满足可注性的基础上,进行了原煤煤样在9种阻化液中的加压吸水试验,结合孔隙分布推导了煤允许不同阻化液注入的最小孔隙孔径,并计算了吨煤阻化剂注入量。研究表明:阻化剂的种类、浓度都会对注入效果产生影响,浓度为25%的MgCl_2阻化液的注入效果最好,其被允许注入煤体的最小孔隙孔径为0.08μm,吨煤阻化剂注入量为3.80 kg。该煤层可优选浓度为25%的MgCl_2进行超前阻化。
In order to study the injectability of the advanced inhibiting coal seam and the effect of inhibitor liquid, taking 3 upper coal seam in Nantun Mine as an example, we carried out the pressure water absorption test of raw coal sample in 9 kinds of inhibitor fluid based on the test and analysis of the injectability of coal seam. Combined pore distribution, we derived the minimum pore diameter of coal with different inhibitor fluids, and calculated the implantation amount of tonnage coal inhibitor.The research shows that the type and concentration of the inhibitor will have an impact on the injection effect, and the injection effect of MgCl_2 with the concentration of 25% is the best. The minimum pore diameter allowed to be injected into the coal body is0.08 μm, and the injection volume of tonnage coal inhibitor is 3.80 kg. MgCl_2 with optimal concentration of 25% can be used to carry out advanced inhibition in the coal seam.
In order to study the injectability of the advanced inhibiting coal seam and the effect of inhibitor liquid, taking 3 upper coal seam in Nantun Mine as an example, we carried out the pressure water absorption test of raw coal sample in 9 kinds of inhibitor fluid based on the test and analysis of the injectability of coal seam. Combined pore distribution, we derived the minimum pore diameter of coal with different inhibitor fluids, and calculated the implantation amount of tonnage coal inhibitor.The research shows that the type and concentration of the inhibitor will have an impact on the injection effect, and the injection effect of MgCl_2 with the concentration of 25% is the best. The minimum pore diameter allowed to be injected into the coal body is0.08 μm, and the injection volume of tonnage coal inhibitor is 3.80 kg. MgCl_2 with optimal concentration of 25% can be used to carry out advanced inhibition in the coal seam.
引文
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[10]李晓龙,吴智明,姜振泉,等.新型溶胶树脂浆液在孔隙-微裂隙岩层治理中的应用[J].煤矿安全,2012,43(7):140-142.
[11]阮文军.注浆扩散与浆液若干基本性能研究[J].岩土工程学报,2005(1):69-73.
[12]高焕甫,王自亮.涡北煤矿煤层的产尘能力及可注性研究[J].矿业安全与环保,2012,39(10):39-42.
[13]秦文贵,张延松.煤孔隙分布与煤层注水增量的关系[J].煤炭学报,2000(5):514-517.
[2]牛国秀,姚建,康怀宇,等.煤层预注阻化剂防治采空区煤自然发火试验研究[J].煤矿开采,2009,14(1):25-28.
[3] Debasis Rath. Application of inhibitor to prevent to spontaneous heating of coal[D]. Rourkela:National Institute of Technology, 2012:38-47.
[4]贺飞,王继仁,郝朝瑜,等.脱氧型阻化剂对煤自燃的抑制效果[J].煤炭学报,2016,41(11):2780-2785.
[5]王雪峰,邓汉忠,邓存宝,等.煤自燃阻化剂选择及喷洒工艺研究[J].中国安全科学学报,2013,23(10):105-109.
[6]单亚飞,王继仁,邓存宝,等.不同阻化剂对煤自燃影响的实验研究[J].辽宁工程技术大学学报(自然科学版),2008(1):1-4.
[7]周西华,李诚玉,李昂,等.以着火活化能变化为指标的优选煤自燃阻化剂研究[J].中国安全科学学报,2014,24(6):20-25.
[8]马砺,任立峰,艾绍武,等.氯盐阻化剂对煤自燃极限参数影响的试验研究[J].安全与环境学报,2015,15(4):83-88.
[9]陈凯,姜振泉,姜春露,等.弱胶结孔隙介质化学浆液可注性及注浆减渗效果试验[J].煤矿安全,2012,43(6):13-16.
[10]李晓龙,吴智明,姜振泉,等.新型溶胶树脂浆液在孔隙-微裂隙岩层治理中的应用[J].煤矿安全,2012,43(7):140-142.
[11]阮文军.注浆扩散与浆液若干基本性能研究[J].岩土工程学报,2005(1):69-73.
[12]高焕甫,王自亮.涡北煤矿煤层的产尘能力及可注性研究[J].矿业安全与环保,2012,39(10):39-42.
[13]秦文贵,张延松.煤孔隙分布与煤层注水增量的关系[J].煤炭学报,2000(5):514-517.