岩浆岩圈闭区煤层钻屑瓦斯解吸指标敏感性研究
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摘要
为研究岩浆热演化区域煤层钻屑瓦斯解吸指标的敏感性,建立杨柳煤矿10煤层岩浆岩圈闭区煤层敏感指标体系,论文采用实验室实验和现场考察相结合的研究方法对岩浆岩圈闭的104,106采区突出预测指标(钻屑瓦斯解吸指标K1,Δh_2)的敏感性进行系统研究。结果表明:岩浆岩圈闭区域10煤层瓦斯初始解吸量大,初始解吸速度快,第1 min及第3~5 min瓦斯解吸量随瓦斯压力的变化符合幂指数关系;依据Δh_2指标计算所得的第3~5 min瓦斯解吸量与实测的瓦斯解吸量平均误差为23.30%,而依据K1指标计算的第1 min瓦斯解吸量与实测的瓦斯解吸量平均误差56.22%;依据Δh_2指标计算所得的第3~5 min瓦斯解吸量与实测的瓦斯解吸量平均误差更小,即表明Δh_2指标更敏感。同时,现场实测的78组钻屑瓦斯解吸指标结果也表明Δh_2指标迫近度方差和标准差较大、对工作面推进过程中的地应力及突出危险程度变化反映能力更强,即Δh_2指标更加敏感。因此,结合现场考察和实验室测定结果,将Δh_2作为10煤层岩浆岩圈闭区主要敏感指标,K1指标作为辅助指标。
In order to study the sensitivity of coal seam gas desorption indexes of drilling cuttings in magmatic thermal evolution zone and establish a sensitive index system of the No. 10 coal seam in the igneous rock trap area,we adopt the methods of combining the laboratory experiments and field investigation to systematically research the sensitivity of the outburst prediction indexes( drilling cuttings gas desorption index K1 and Δh_2) in the No. 104,106 mining area. The results show that the gas initial desorption volume of the No. 10 coal seam is large,and the initial desorption speed is very fast in igneous rock trap area. The gas desorption variation of the first 1 min and during the 3 ~ 5 min with the gas pressure are fitting the line with the power index relationship. The average error of gas desorption be-tween the calculation results of Δh_2 index and measured gas desorption was 23. 30%,while the average error between the calculation of K1 index and measured gas desorption was 56. 22%,which show that the Δh_2 index is more sensitive. Furthermore,the 78 groups field observations measuring results of drilling cuttings gas desorption indexes also show that the proximity variance and standard deviation of theΔh_2 index are larger,which could more exactly reflect the variations of the ground stress and the outburst risk level in the mining process of working face and verify the Δh_2 index is more sensitive. Based on the above results,Δh_2 was used as the main sensitive index,and K1 was used as the auxiliary index for the No. 10 coal seam in the igneous rock trap area.
In order to study the sensitivity of coal seam gas desorption indexes of drilling cuttings in magmatic thermal evolution zone and establish a sensitive index system of the No. 10 coal seam in the igneous rock trap area,we adopt the methods of combining the laboratory experiments and field investigation to systematically research the sensitivity of the outburst prediction indexes( drilling cuttings gas desorption index K1 and Δh_2) in the No. 104,106 mining area. The results show that the gas initial desorption volume of the No. 10 coal seam is large,and the initial desorption speed is very fast in igneous rock trap area. The gas desorption variation of the first 1 min and during the 3 ~ 5 min with the gas pressure are fitting the line with the power index relationship. The average error of gas desorption be-tween the calculation results of Δh_2 index and measured gas desorption was 23. 30%,while the average error between the calculation of K1 index and measured gas desorption was 56. 22%,which show that the Δh_2 index is more sensitive. Furthermore,the 78 groups field observations measuring results of drilling cuttings gas desorption indexes also show that the proximity variance and standard deviation of theΔh_2 index are larger,which could more exactly reflect the variations of the ground stress and the outburst risk level in the mining process of working face and verify the Δh_2 index is more sensitive. Based on the above results,Δh_2 was used as the main sensitive index,and K1 was used as the auxiliary index for the No. 10 coal seam in the igneous rock trap area.
引文
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[11]Li X,Yan D,Qiu L.Early cretaceous post-collisional collapse of the Yidun terrane:geochronological and geochemical constraints from calc-alkaline to alkaline basalts in Xiqiu Area,Southwest China[J].Journal of Earth Science,2018,29(1):57-77.
[12]Chen Y.Thermal-rheological effects induced by crustal magmatic under plating and implications for emeishan large igneous province[J].Acta Petrologica Sinica,2018,34(1):91-102.
[13]Wang C Y,Wei B,Zhou M F,et al.A synthesis of magmatic Ni-Cu-(PGE)sulfide deposits in the-260 Ma emeishan large igneous province,SW China and northern vietnam[J].Journal of Asian Earth Sciences,2018,154:162-186.
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[16]孔胜利,程龙彪,王海锋,等.钻屑瓦斯解吸指标临界值的确定及应用[J].煤炭科学技术,2014,42(8):56-59.KONG Sheng-li,CHENG Long-biao,WANG Hai-feng,et al.Determination and application on critical value of drilling cuttings gas desorption indices[J].Coal Science and Technology,2014,42(8):56-59.
[17]孟絮屹,桂祥友,郁钟铭.钻屑量与钻屑瓦斯解吸指标预测突出的应用研究[J].矿业研究与开发,2008,28(4):64-66.MENG Xu-yi,GUI Xiang-you,YU Zhong-ming.Study on application of drill cutting weight and its gas desorption index in forecasting coal and gas out burst[J].Mining Research and Development,2008,28(4):64-66.
[18]桂祥友,徐佑林,孟絮屹,等.钻屑量与钻屑瓦斯解吸指标在防突预测的应用[J].北京科技大学学报,2009,31(3):285-289.GUI Xiang-you,XU You-lin,MENG Xu-yi,et al.Application of the value of drilling cuttings weight and desorption index for drill cuttings to preventing coal and gas outburst[J].Journal of University of Science and Technology Beijing,2009,31(3):285-289.
[19]李国红,王兆丰,陈向军.煤样重量对钻屑瓦斯解吸指标(△h2)的影响程度研究[J].煤,2011,20(8):1-3,20.LI Guo-hong,WANG Zhao-feng,CHEN Xiang-jun.Research on the influence of coal sample weight on the desorption index of drill cuttings[J].Coal,2011,20(8):1-3,20.
[20]李新建.钻屑瓦斯解吸指标与瓦斯含量关系的实验研究[J].煤矿安全,2014,45(3):8-12.LI Xin-jian.Experimental research on the relationship between gas desorption index of drill cuttings and gas content[J].Safety in Coal Mines,2014,45(3):8-12.
[21]Shen K,Zhou H.A new mathematical model of the relationship between gas desorption index of drill cuttings and gas content[J].Progress in Mine Safety Science and EngineeringⅡ,2014:907-911.
[22]Sun L J,Nie B,Ding C,et al.Study on gas content critical value for regional prediction in Hebi area[J].Procedia Engineering,2011,26(4):839-843.
[23]Sun L J,Nie B,Hao F.An experimental study of methane gas critical value achieved by regional prediction at mining areas with different coal ranks:case studies of Longshan anthracite coals and Dazhong lean coal in the Anyang mining area,northern Henan province,China[J].Natural Gas Industry,2013,33(3):101-106.
[24]贾东旭.钻屑瓦斯解吸指标临界值实验研究[J].煤矿安全,2013,44(8):4-7.JIA Dong-xu.Experimental study of gas desorption index critical value of drilling cuttings[J].Safety in Coal Mines,2013,44(8):4-7.
[2]王亮,程远平,聂政,等.巨厚火成岩对煤层瓦斯赋存及突出灾害的影响[J].中国矿业大学学报,2011,40(1):29-34.WANG Liang,CHENG Yuan-ping,NIE Zheng,et al.Effects of an extremely thick igneous rock on gas occurrence and outburst disasters in a coal seam[J].Journal of China University of Mining and Technology,2011,40(1):29-34.
[3]Wang L,Cheng Y P,An F H,et al.Characteristics of gas disaster in the Huaibei coalfield and its control and development technologies[J].Natural Hazards,2014,71(1):85-107.
[4]Chen E T,Wang L,Cheng Y,et al.Pulverization characteristics of coal affected by magmatic intrusion and analysis of the abnormal gas desorption index on drill cuttings[J].Adsorption Science and Technology,2018,36(1-2):805-829.
[5]Cheng L,Wang L,Cheng Y,et al.Gas desorption index of drill cuttings affected by magmatic sills for predicting outbursts in coal seams[J].Arabian Journal of Geosciences,2016,9(1):61.
[6]蒋静宇,程远平,王海峰,等.岩浆侵入对煤吸附瓦斯特性的影响分析[J].采矿与安全工程学报,2012,29(1):118-123.JIANG Jing-yu,CHENG Yuan-ping,WANG Hai-feng,et al.Effect of igneous intrusion on adsorption characteristics of coal to gas[J].Journal of Mining and Safety Engineering,2012,29(1):118-123.
[7]蒋静宇,程远平.淮北矿区岩浆岩侵入对煤储层微孔隙特征的影响[J].煤炭学报,2012,37(4):634-640.JIANG Jing-yu,CHENG Yuan-ping.Influence of igneous intrusion on micro pore characteristics of coal reserves in Huaibei coalfield[J].Journal of China Coal Society,2012,37(4):634-640.
[8]蒋静宇.岩浆岩侵入对瓦斯赋存的控制作用及突出灾害防治技术[D].徐州:中国矿业大学,2012.JIANG Jing-yu.Control effect of igneous intrusion on methane reserve and outburst disaster prevention technology based on Huaibei coalfield[D].Xuzhou:China University of Mining and Technology,2012.
[9]Chen M Y,Cheng Y P,Zhou H X,et al.Effects of igneous intrusions on coal pore structure,methane desorption and diffusion within coal and gas occurrence[J].Environmental and Engineering Geoscience,2017,23(3):191-207.
[10]Gurba L W.Effects of igneous intrusions on coalbed methane potential,Gunnedah Basin,Australia[J].International Journal of Coal Geology,2001,46(2-4):113-131.
[11]Li X,Yan D,Qiu L.Early cretaceous post-collisional collapse of the Yidun terrane:geochronological and geochemical constraints from calc-alkaline to alkaline basalts in Xiqiu Area,Southwest China[J].Journal of Earth Science,2018,29(1):57-77.
[12]Chen Y.Thermal-rheological effects induced by crustal magmatic under plating and implications for emeishan large igneous province[J].Acta Petrologica Sinica,2018,34(1):91-102.
[13]Wang C Y,Wei B,Zhou M F,et al.A synthesis of magmatic Ni-Cu-(PGE)sulfide deposits in the-260 Ma emeishan large igneous province,SW China and northern vietnam[J].Journal of Asian Earth Sciences,2018,154:162-186.
[14]刘军,高森,袁军伟.顾桥矿突出预测敏感指标敏感性分析[J].煤矿安全,2013,44(3):163-165.LIU Jun,GAO Sen,YUAN Jun-wei.Sensibility analysis of outburst prediction sensitive indexes in guqiao coal mine[J].Safety in Coal Mines,2013,44(3):163-165.
[15]翟清伟,程远平,王亮,等.祁南煤矿72#煤层钻屑瓦斯解吸指标敏感性分析[J].中国煤炭,2012,38(1):88-91.ZHAI Qing-wei,CHENG Yuan-ping,WANG Liang,et al.Analysis of sensitivity of gas desorption index of drill cuttings in No.72 coal seam in Qinan coal mine[J].China Coal,2012,38(1):88-91.
[16]孔胜利,程龙彪,王海锋,等.钻屑瓦斯解吸指标临界值的确定及应用[J].煤炭科学技术,2014,42(8):56-59.KONG Sheng-li,CHENG Long-biao,WANG Hai-feng,et al.Determination and application on critical value of drilling cuttings gas desorption indices[J].Coal Science and Technology,2014,42(8):56-59.
[17]孟絮屹,桂祥友,郁钟铭.钻屑量与钻屑瓦斯解吸指标预测突出的应用研究[J].矿业研究与开发,2008,28(4):64-66.MENG Xu-yi,GUI Xiang-you,YU Zhong-ming.Study on application of drill cutting weight and its gas desorption index in forecasting coal and gas out burst[J].Mining Research and Development,2008,28(4):64-66.
[18]桂祥友,徐佑林,孟絮屹,等.钻屑量与钻屑瓦斯解吸指标在防突预测的应用[J].北京科技大学学报,2009,31(3):285-289.GUI Xiang-you,XU You-lin,MENG Xu-yi,et al.Application of the value of drilling cuttings weight and desorption index for drill cuttings to preventing coal and gas outburst[J].Journal of University of Science and Technology Beijing,2009,31(3):285-289.
[19]李国红,王兆丰,陈向军.煤样重量对钻屑瓦斯解吸指标(△h2)的影响程度研究[J].煤,2011,20(8):1-3,20.LI Guo-hong,WANG Zhao-feng,CHEN Xiang-jun.Research on the influence of coal sample weight on the desorption index of drill cuttings[J].Coal,2011,20(8):1-3,20.
[20]李新建.钻屑瓦斯解吸指标与瓦斯含量关系的实验研究[J].煤矿安全,2014,45(3):8-12.LI Xin-jian.Experimental research on the relationship between gas desorption index of drill cuttings and gas content[J].Safety in Coal Mines,2014,45(3):8-12.
[21]Shen K,Zhou H.A new mathematical model of the relationship between gas desorption index of drill cuttings and gas content[J].Progress in Mine Safety Science and EngineeringⅡ,2014:907-911.
[22]Sun L J,Nie B,Ding C,et al.Study on gas content critical value for regional prediction in Hebi area[J].Procedia Engineering,2011,26(4):839-843.
[23]Sun L J,Nie B,Hao F.An experimental study of methane gas critical value achieved by regional prediction at mining areas with different coal ranks:case studies of Longshan anthracite coals and Dazhong lean coal in the Anyang mining area,northern Henan province,China[J].Natural Gas Industry,2013,33(3):101-106.
[24]贾东旭.钻屑瓦斯解吸指标临界值实验研究[J].煤矿安全,2013,44(8):4-7.JIA Dong-xu.Experimental study of gas desorption index critical value of drilling cuttings[J].Safety in Coal Mines,2013,44(8):4-7.