埋管抽采位置及负压变化对采空区煤自燃危险区域的影响

张仲清

doi:10.13272/j.issn.1671-251x.2022080016

埋管抽采位置及负压变化对采空区煤自燃危险区域的影响

doi: 10.13272/j.issn.1671-251x.2022080016

张仲清^{1, 2,}

1.
中煤大同能源有限责任公司，山西大同　037008
2.
河南理工大学河南省瓦斯地质与瓦斯治理重点实验室——省部共建国家重点实验室培育基地，河南焦作　454000

基金项目: 河南省瓦斯地质与瓦斯治理重点实验室——省部共建国家重点实验室培育基地开放基金资助项目（WS2019A02）。

详细信息

作者简介:
张仲清（1973—），男，山西朔州人，工程师，现从事煤矿企业管理工作，E-mail：1625871484@qq.com

中图分类号: TD712
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- 被引次数: 0
出版历程
- 收稿日期: 2022-08-04
- 修回日期: 2023-10-06
- 网络出版日期: 2023-10-23

The influence of buried pipe extraction position and negative pressure change on the dangerous area ofcoal spontaneous combustion in the goaf

ZHANG Zhongqing^{1, 2
,}

1.
China Coal Datong Energy Co., Ltd., Datong 037008, China
2.
State Key Laboratory Cultivation Base for Gas Geology and Gas Control-the National Key Laboratory Cultivation Base Jointly Established by the Province and the Ministry, Henan Polytechnic University, Jiaozuo 454000, China

摘要

摘要: 瓦斯抽采是治理矿井灾害常用方式之一，但在抽采过程中会增加采空区漏风量，进而增加遗煤自燃风险，直接影响采空区煤自燃危险区域分布。以中煤大同能源有限责任公司塔山煤矿30503工作面为研究对象，根据采空区实际情况建立几何模型，采用数值模拟方法分析了不同埋管抽采位置和抽采负压对采空区煤自燃危险区域的影响。结果表明：① 随着进风侧埋管抽采位置的深入，回风侧氧气体积分数呈增大趋势，而氧化带宽度变化不大；进风侧氧气体积分数整体呈减小趋势，氧化带宽度先减小后增大；采空区氧化带面积先减小后增大。② 在进风侧固定埋管抽采位置，抽采负压的变化对采空区进风侧氧气分布的影响更大，而对回风侧几乎没有影响。③ 随着抽采负压增大，进风侧氧化带宽度先减小后增大，而回风侧氧化带宽度几乎不变；采空区氧化带面积先减小后增大，氧化带面积与抽采负压呈二次函数关系。④ 最佳埋管抽采位置为采空区进风侧距离工作面20 m处，最佳抽采负压为5 000 Pa，此时采空区氧化带面积最小，即煤自燃危险区域最小。
- 瓦斯抽采 /
- 采空区 /
- 煤自燃 /
- 埋管 /
- 抽采负压 /
- 氧化带
Abstract: Gas extraction is one of the commonly used methods for controlling the mine disasters. But during the extraction process, it will increase the amount of air leakage in the goaf, thereby increasing the risk of coal spontaneous combustion and directly affecting the distribution of coal spontaneous combustion dangerous areas in the goaf. Taking the 30503 working face of Tashan Coal Mine of China Coal Datong Energy Co., Ltd. as the research object, according to the actual situation of the goaf, a geometric model is established. The numerical simulation methods is used to analyze the impact of different buried pipe extraction positions and extraction negative pressure on the dangerous area of coal spontaneous combustion in the goaf. The results show the following points. ① With the deepening of the extraction position of the buried pipe on the inlet side, the oxygen volume fraction on the return side shows an increasing trend. The width of the oxidation zone does not change much. The overall oxygen volume fraction on the inlet side shows a decreasing trend, and the width of the oxidation zone first decreases and then increases. The oxidation zone area in the goaf first decreases and then increases. ② In the inlet side of the fixed buried pipe extraction position, the change of the negative pressure of extraction has a greater effect on the oxygen distribution on the inlet side of the extraction zone, while it has almost no effect on the return side. ③ As the negative pressure of extraction increases, the width of the oxidation zone on the inlet side first decreases and then increases, while the width of the oxidation zone on the return side remains almost unchanged. The area of the oxidation zone in the goaf first decreases and then increases. The relationship between the oxidation zone area and the extraction negative pressure is a quadratic function. ④ The optimal position for buried pipe extraction is at a distance of 20 m from the air inlet side of the goaf to the working face. The optimal negative pressure for extraction is 5 000 Pa. At this time, the oxidation zone area of the goaf is the smallest, that is, the coal spontaneous combustion danger area is the smallest.
- gas extraction /
- goaf /
- coal spontaneous combustion /
- buried pipe /
- extraction negative pressure /
- oxidation zone

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图 1 煤氧化时间与氧气体积分数关系曲线

Figure 1. Relationship curve of coal oxidation time and oxygen volume fraction

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图 2 采空区几何模型

Figure 2. Geometric model of goaf

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图 3 气体测点布置

Figure 3. Arrangement of gas measuring points

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图 4 采空区进风侧氧气体积分数随采空区深度变化曲线

Figure 4. Variation curve of oxygen volume fraction at air inlet side of goaf with goaf depth

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图 5 不同埋管抽采位置下采空区氧气体积分数分布

Figure 5. Distribution of oxygen volume fraction in goaf under different buried pipe extraction positions

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图 6 进风侧氧气体积分数随采空区深度变化曲线

Figure 6. Variation curve of oxygen volume fraction at air inlet side with goaf depth

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图 7 回风侧氧气体积分数随采空区深度变化曲线

Figure 7. Variation curve of oxygen volume fraction at return air side with goaf depth

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图 8 不同埋管抽采位置下氧化带面积变化曲线

Figure 8. Variation curve of oxidation zone area under different buried pipe extraction positions

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图 9 不同抽采负压下采空区氧气体积分数分布

Figure 9. Distribution of oxygen volume fraction in gob under different extraction negative pressures

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图 10 进风侧氧气体积分数随采空区深度变化曲线

Figure 10. Variation curve of oxygen volume fraction at air intake side with goaf depth

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图 11 回风侧氧气体积分数随采空区深度变化曲线

Figure 11. Variation curve of oxygen volume fraction at return air side with goaf depth

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图 12 不同抽采负压下氧化带面积变化曲线

Figure 12. Variation curve of oxidation zone area under different extraction negative pressures

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表 1 模型参数

Table 1. Parameters of model

模型组成部分	尺寸/（m×m×m）	空间填充
30503进回风巷	4.6×5×20	流体
30503工作面	193×11.4×4	流体
30503采空区	240×193×16.4	以压实煤体为主体的多孔介质
地表裂隙	173×0.2×15	流体
垮落部分	193×200×4.6	多孔介质
上覆采空区	250×195×9	以压实煤体为主体的多孔介质

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参考文献(21)

[1]	李林. 采空区煤自燃环境瓦斯运移积聚规律研究[D]. 徐州:中国矿业大学,2020. LI Lin. Study on methane migration and accumulation in spontaneous coal combustion environment of a coal mined-out area[D]. Xuzhou:China University of Mining and Technology,2020.
[2]	邓军,李贝,王凯,等. 我国煤火灾害防治技术研究现状及展望[J]. 煤炭科学技术,2016,44(10):1-7,101. doi: 10.13199/j.cnki.cst.2016.10.001 DENG Jun,LI Bei,WANG Kai,et al. Research status and outlook on prevention and control technology of coal fire disaster in China[J]. Coal Science and Technology,2016,44(10):1-7,101. doi: 10.13199/j.cnki.cst.2016.10.001
[3]	戴林超,曹偈,赵旭生,等. 采空区瓦斯涌出强度对其流动规律的影响研究[J]. 安全与环境学报,2019,19(6):1963-1970. doi: 10.13637/j.issn.1009-6094.2019.06.014 DAI Linchao,CAO Jie,ZHAO Xusheng,et al. Probe into the influence of the gas effusion intensity in accordance with its flowing regularity in the goaf[J]. Journal of Safety and Environment,2019,19(6):1963-1970. doi: 10.13637/j.issn.1009-6094.2019.06.014
[4]	吴怡. 抽采条件下采空区自燃特性数值模拟研究[D]. 唐山:华北理工大学,2019. WU Yi. Numerical simulation of goaf spontaneous combustion characteristics under extraction conditions[D]. Tangshan:North China University of Science and Technology,2019.
[5]	慕兰兰,传金平,杨小彬,等. 砚北煤矿特厚易自燃煤层邻近采空区瓦斯抽采与煤自燃耦合研究[J]. 矿业安全与环保,2023,50(1):25-36. doi: 10.19835/j.issn.1008-4495.2023.01.005 MU Lanlan,CHUAN Jinping,YANG Xiaobin,et al. Coupling study of gas extraction and coal spontaneous combustion in goaf adjacent to extra-thick spontaneous combustion coal seam in Yanbei Coal Mine[J]. Mining Safety & Environmental Protection,2023,50(1):25-36. doi: 10.19835/j.issn.1008-4495.2023.01.005
[6]	王向东,穆永亮,刘伟伟. 工作面初采阶段高位定向长钻孔瓦斯抽采技术研究与实践[J]. 煤炭技术,2023,42(2):143-146. doi: 10.13301/j.cnki.ct.2023.02.033 WANG Xiangdong,MU Yongliang,LIU Weiwei. Research and practice on gas extraction technology of high directional long drilling holes in working face initial mining stage[J]. Coal Technology,2023,42(2):143-146. doi: 10.13301/j.cnki.ct.2023.02.033
[7]	崔传发. 采空区瓦斯抽采钻孔参数及注氮防灭火研究[J]. 工矿自动化,2020,46(3):12-20. doi: 10.13272/j.issn.1671-251x.2019050049 CUI Chuanfa. Research on gas drainage drilling parameters and nitrogen injection for fire prevention in goaf[J]. Industry and Mine Automation,2020,46(3):12-20. doi: 10.13272/j.issn.1671-251x.2019050049
[8]	施式亮,曾明圣,李贺,等. 煤自燃与瓦斯共生灾害演化与预警[J]. 煤矿安全,2022,53(9):9-16. SHI Shiliang,ZENG Mingsheng,LI He,et al. Coal spontaneous combustion and gas symbiotic disasters evolution and early warning[J]. Safety in Coal Mines,2022,53(9):9-16.
[9]	王飞,谷晓玲. 综放工作面采空区抽放注氮与遗煤自燃三耦合关系研究[J]. 煤炭技术,2021,40(2):145-147. doi: 10.13301/j.cnki.ct.2021.02.040 WANG Fei,GU Xiaoling. Study on coupling relationship between nitrogen injection and coal spontaneous combustion in goaf of fully mechanized top coal caving face[J]. Coal Technology,2021,40(2):145-147. doi: 10.13301/j.cnki.ct.2021.02.040
[10]	张京兆,王建国,闫涛,等. 高抽巷层位及负压的变化对采空区自燃氧化带影响的数值模拟[J]. 矿业研究与开发,2020,40(10):108-112. doi: 10.13827/j.cnki.kyyk.2020.10.020 ZHANG Jingzhao,WANG Jianguo,YAN Tao,et al. Numerical simulation on the influence of the location of high extraction lane and the change of negative pressure on the spontaneous combustion oxidation zone in the goaf[J]. Mining Research and Development,2020,40(10):108-112. doi: 10.13827/j.cnki.kyyk.2020.10.020
[11]	汪腾蛟,聂朝刚,杨小彬,等. 考虑温度变化的采空区瓦斯抽采数值模拟[J]. 煤炭科学技术,2021,49(7):85-94. doi: 10.13199/j.cnki.cst.2021.07.012 WANG Tengjiao,NIE Chaogang,YANG Xiaobin,et al. Numerical simulation of gas drainage in gob considering temperature change[J]. Coal Science and Technology,2021,49(7):85-94. doi: 10.13199/j.cnki.cst.2021.07.012
[12]	范加锋. 低位巷瓦斯抽采条件下采空区遗煤自燃规律研究[J]. 工矿自动化,2023,49(2):102-108,124. doi: 10.13272/j.issn.1671-251x.2022070031 FAN Jiafeng. Study on spontaneous combustion law of residual coal in goaf under the condition of gas extraction in the low-level roadway[J]. Journal of Mine Automation,2023,49(2):102-108,124. doi: 10.13272/j.issn.1671-251x.2022070031
[13]	王继仁,张英,黄戈,等. 采空区不同瓦斯抽采方法与自燃合理平衡的数值模拟[J]. 中国安全生产科学技术,2015,11(8):26-32. WANG Jiren,ZHANG Ying,HUANG Ge,et al. Numerical simulation on reasonable balance between different gas drainage methods and spontaneous combustion in gob area[J]. Journal of Safety Science and Technology,2015,11(8):26-32.
[14]	杜阳,翁旭泽,戚绪尧,等. 远距离抽采条件下采空区煤自燃区域分布规律[J]. 煤矿安全,2020,51(1):196-199,205. doi: 10.13347/j.cnki.mkaq.2020.01.044 DU Yang,WENG Xuze,QI Xuyao,et al. Distribution law of spontaneous combustion danger zone of coal in goaf under long distance extraction[J]. Safety in Coal Mines,2020,51(1):196-199,205. doi: 10.13347/j.cnki.mkaq.2020.01.044
[15]	文虎,王文,程小蛟,等. 不同抽采条件对采空区煤自燃“三带”的影响研究[J]. 矿业安全与环保,2020,47(6):1-7. doi: 10.19835/j.issn.1008-4495.2020.06.001 WEN Hu,WANG Wen,CHENG Xiaojiao,et al. Study on the effect of different extraction conditions on "three zones" of coal spontaneous combustion in goaf[J]. Mining Safety & Environmental Protection,2020,47(6):1-7. doi: 10.19835/j.issn.1008-4495.2020.06.001
[16]	邢旭东,庞奇,张宏斌,等. 不规则采空区防火注氮位置数值模拟研究[J]. 煤炭技术,2021,40(8):143-146. doi: 10.13301/j.cnki.ct.2021.08.036 XING Xudong,PANG Qi,ZHANG Hongbin,et al. Numerical simulation of fire nitrogen injection parameters in irregular goaf[J]. Coal Technology,2021,40(8):143-146. doi: 10.13301/j.cnki.ct.2021.08.036
[17]	刘轶康,牛会永,聂琦苗,等. 高地温矿井采空区煤自燃O₂浓度场分布研究[J]. 工矿自动化,2021,47(8):108-114. LIU Yikang,NIU Huiyong,NIE Qimiao,et al. Study on the distribution of O₂ concentration field of coal spontaneous combustion in high ground temperature goaf[J]. Industry and Mine Automation,2021,47(8):108-114.
[18]	黎力,李治刚,奚弦,等. 采空区自然发火多场耦合数值模拟研究[J]. 中国矿业,2017,26(3):157-160. doi: 10.3969/j.issn.1004-4051.2017.03.032 LI Li,LI Zhigang,XI Xian,et al. Multi-filed coupling numerical simulation of spontaneous combustion in goaf[J]. China Mining Magazine,2017,26(3):157-160. doi: 10.3969/j.issn.1004-4051.2017.03.032
[19]	高光超,李宗翔,张春,等. 基于三维“O”型圈的采空区多场分布特征数值模拟[J]. 安全与环境学报,2017,17(3):931-936. doi: 10.13637/j.issn.1009-6094.2017.03.023 GAO Guangchao,LI Zongxiang,ZHANG Chun,et al. Numerical simulation for multi-field distribution characteristic features of the goaf based on 3D "O" type circle[J]. Journal of Safety and Environment,2017,17(3):931-936. doi: 10.13637/j.issn.1009-6094.2017.03.023
[20]	屈世甲,安世岗,武福生,等. 大采高综采工作面采空区自燃“三带”研究[J]. 工矿自动化,2019,45(5):22-25. doi: 10.13272/j.issn.1671-251x.17403 QU Shijia,AN Shigang,WU Fusheng,et al. Research on spontaneous combustion "three zones" in goaf of fully mechanized working face with large mining height[J]. Industry and Mine Automation,2019,45(5):22-25. doi: 10.13272/j.issn.1671-251x.17403
[21]	孙留涛,段宇建,黄均泽. 青东煤矿10煤层标志性气体优选及自燃“三带”划分[J]. 工矿自动化,2018,44(11):56-61. doi: 10.13272/j.issn.1671-251x.2018070050 SUN Liutao,DUAN Yujian,HUANG Junze. Optimization of index gases and division method of spontaneous combustion "three zones" in 10 coal seam of Qingdong Coal Mine[J]. Industry and Mine Automation,2018,44(11):56-61. doi: 10.13272/j.issn.1671-251x.2018070050