王家岭矿综放工作面上隅角瓦斯体积分数场分布规律研究
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摘要
针对煤矿综放工作面上隅角瓦斯积聚严重影响安全生产的问题,从综放工作面上隅角瓦斯体积分数场分布规律与上隅角瓦斯抽采的关系出发,采用MATLAB场分析法,以山西中煤华晋能源有限责任公司王家岭矿12318综放工作面的正方形上隅角为研究对象,对上隅角区域的瓦斯体积分数场分布进行了分析。结果表明:12318综放工作面上隅角靠近采空区一侧以及靠近回风巷外侧煤壁处瓦斯体积分数较高,最高可达0. 5%;靠近工作面处瓦斯体积分数较低,仅为0. 10%～0. 25%。这对于合理有效地治理上隅角瓦斯体积分数超限问题具有重要的指导意义。根据研究结果,提出了采用顶板走向定向高位钻孔抽采和埋(插)管抽采等综合瓦斯治理方法,该方法有效地降低了上隅角瓦斯体积分数,即从0. 7%降低至0. 3%左右。
In view of the problem that the gas accumulation at upper corner in fully mechanized coal face with sublevel caving seriously affects coal mine safety production,the distribution of gas volume fraction field at the upper corner in the coal face 12318 of Wangjialing coal mine the relationship between the distribution law of gas volume fraction field in the coal face and the gas pumping at the upper corner. The results showed that gas concentration at the upper corner in the side near the gob and outside of the air-return in the coal face 12318 was higher than that in other area,where the maximum gas concentration was 0. 5%; while gas volume fraction at the upper corner in the side near the coal face was lower,where gas concentration only was 0. 1% ～ 0. 25%.According to the conclusions,the comprehensive gas control methods such as gas drainage by high-position oriented and horizontal long holes and pre-embedded or inserting pipes were put forward,and when gas volume fraction at upper corner effectively was reduced from 0. 7% to around 0. 3%.
In view of the problem that the gas accumulation at upper corner in fully mechanized coal face with sublevel caving seriously affects coal mine safety production,the distribution of gas volume fraction field at the upper corner in the coal face 12318 of Wangjialing coal mine the relationship between the distribution law of gas volume fraction field in the coal face and the gas pumping at the upper corner. The results showed that gas concentration at the upper corner in the side near the gob and outside of the air-return in the coal face 12318 was higher than that in other area,where the maximum gas concentration was 0. 5%; while gas volume fraction at the upper corner in the side near the coal face was lower,where gas concentration only was 0. 1% ～ 0. 25%.According to the conclusions,the comprehensive gas control methods such as gas drainage by high-position oriented and horizontal long holes and pre-embedded or inserting pipes were put forward,and when gas volume fraction at upper corner effectively was reduced from 0. 7% to around 0. 3%.
引文
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[12]冀超辉.厚煤层分层开采工作面瓦斯流场分布规律研究[J].河南理工大学学报(自然科学版),2015,34(4):455-458.JI C H. Study on gas distribution regularity for thick coal seam layering mining working face[J]. Journal of Henan Polytechnic University(Natural science),2015,34(4):455-458.
[13]孙凯民,李增华,杨昌能,等.利用采场覆岩裂隙研究优化采空区瓦斯抽放参数[J].采矿与安全工程学报,2008,25(3):366-367.SUN K M,LI Z H,YANG C N,et al. Optimization of goaf gas drainage parameters based on studying cracks in overlying strata of stope[J]. Journal of Mining&Safety Engineering,2008,25(3):366-367.
[14]蔡文鹏,刘健,孙东生,等.顶板走向高位钻孔瓦斯抽采技术的研究及应用[J].中国安全科学生产技术,2013,9(12):35-38.CAI W P,LIU J,SUN D S,et al. Research and application of gas drainage technique with high-located drilling method along roof strike[J]. Journal of Safety Science and Technology,2013,9(12):35-38.
[15]王兆丰,李宏,杨宏民,等.采空区瓦斯治理及利用实践[J].煤炭科学技术,2011,39(4):56-59.WANG Z F,LI H,YANG H M,et al. Practices on goaf gas control and utilization[J]. Coal Science and Technology,2011,39(4):56-59.
[16]冀占强,赵发军,刘明举.基于裂隙带展布的采空区瓦斯抽放方法研究[J].煤矿安全,2015,46(10):2-4.JI Z Q,ZHAO F J,LIU M J. Gas drainage method for a gob based on distribution of fissure zone[J]. Safety in Coal Mines,2015,46(10):2-4.
[2]林柏泉,周世宁,张仁贵. U形通风工作面采空区上隅角瓦斯治理技术[J].煤炭学报,1997,22(5):509-513.LIN B Q,ZHOU S N,ZHANG R G. Methane controlling technique at the upper corner of the goaf in U-type ventilation face[J]. Journal of China Coal Society,1997,22(5):509-513.
[3]鲁忠良,魏震,李玉江,等.采煤工作面瓦斯体积分数分布规律研究[J].河南理工大学学报(自然科学版),2016,35(6):771-774.LU Z L,WEI Z,LI Y J,et al. Study on the coal mining working face spatial of gas concentration distribution[J]. Journal of Henan Polytechnic University(Natural science),2016,35(6):771-774.
[4]于不凡.煤矿瓦斯灾害防治及利用手册(修订版)[M].北京:煤炭工业出版社,2005,316-335.YU B F. Coal mine gas disaster prevention and utilization technology manual[M]. Beijing:China Coal Industry Publishing House,2005:316-335.
[5]杨胜强,俞启香,王钦方,等.单元法测定瓦斯分布及旋转射流驱散积聚瓦斯[J].中国矿业大学学报,2003,32(5):530-531.YANG S Q,YUN Q X,WANG Q F,et al. Unit method measuring gas concentration distribution and rotary radial-jet dispersing accumulating gas[J]. Journal of China University of Mining&Technology,2003,32(5):530-531.
[6]王克武,孙福玉.低瓦斯矿井工作面上隅角瓦斯超限治理技术[J].煤炭科学技术,2012,40(5):49-51.WANG K W,SUN F Y. Gas over limit control technology of top corner in coal mining face of low gassy mine[J]. Coal Science and Technology,2012,40(5):49-51.
[7]汤友谊,李红晓.基于最小二乘法的工作面上隅角瓦斯浓度分析方法研究[J].中国矿业,2011,20(7):111-114.TANG Y Y,LI H X. Study of methane concentration in upper corner based on the least square method[J].China Mining Magazine,2011,20(7):111-114.
[8]付明明,张英华,黄志安,等.弧形顶板垮落对上隅角瓦斯扰动的研究[J].采矿与安全工程学报,2016,33(1):186-189.FU M M,ZHANG Y H,HUANG Z A,et al. Research of the disturbance of curved roof caving for gas in upper corner[J]. Journal of Mining&Safety Engineering,2016,33(1):186-189.
[9]吕品,马云歌,周心权.上隅角瓦斯浓度动态预测模型的研究及应用[J].煤炭学报,2006,31(4):461-465.LV P,MA Y G,ZHOU X Q,et al. Research and application on dynamic forecasting model of gas consistence in top corner[J]. Journal of China Coal Society,2006,31(4):461-465.
[10]许彦鹏.采面上隅角瓦斯超限瓦斯稀释器治理技术研究[J].河南理工大学学报(自然科学版),2014,12(6):710-711.XU Y P. Study on treatment technology of gas gauge in coal mining face top corner using gas diluter[J]. Journal of Henan Polytechnic University(Natural science),2014,12(6):710-711.
[11]林柏泉,张仁贵. U型通风工作面采空区瓦斯涌出及其治理[J].煤炭学报,1998,23(2):155-159.LIN B Q,ZHANG R G. Methane emission from the mined-out area and its control in a face with U type air ventilate[J]. Journal of China Coal Society,1998,23(2):155-159.
[12]冀超辉.厚煤层分层开采工作面瓦斯流场分布规律研究[J].河南理工大学学报(自然科学版),2015,34(4):455-458.JI C H. Study on gas distribution regularity for thick coal seam layering mining working face[J]. Journal of Henan Polytechnic University(Natural science),2015,34(4):455-458.
[13]孙凯民,李增华,杨昌能,等.利用采场覆岩裂隙研究优化采空区瓦斯抽放参数[J].采矿与安全工程学报,2008,25(3):366-367.SUN K M,LI Z H,YANG C N,et al. Optimization of goaf gas drainage parameters based on studying cracks in overlying strata of stope[J]. Journal of Mining&Safety Engineering,2008,25(3):366-367.
[14]蔡文鹏,刘健,孙东生,等.顶板走向高位钻孔瓦斯抽采技术的研究及应用[J].中国安全科学生产技术,2013,9(12):35-38.CAI W P,LIU J,SUN D S,et al. Research and application of gas drainage technique with high-located drilling method along roof strike[J]. Journal of Safety Science and Technology,2013,9(12):35-38.
[15]王兆丰,李宏,杨宏民,等.采空区瓦斯治理及利用实践[J].煤炭科学技术,2011,39(4):56-59.WANG Z F,LI H,YANG H M,et al. Practices on goaf gas control and utilization[J]. Coal Science and Technology,2011,39(4):56-59.
[16]冀占强,赵发军,刘明举.基于裂隙带展布的采空区瓦斯抽放方法研究[J].煤矿安全,2015,46(10):2-4.JI Z Q,ZHAO F J,LIU M J. Gas drainage method for a gob based on distribution of fissure zone[J]. Safety in Coal Mines,2015,46(10):2-4.