上覆采空区有害气体下泄防治技术
|
摘要
大同矿区侏罗系属于近距离煤层群开采,上覆采空区内的有害气体容易下泄进入下部工作面,严重威胁着作业人员的生命安全。采用相似材料模拟试验系统研究覆岩破断运移与裂隙分布规律,结合现场实测数据分析有害气体下泄过程。结合多层采空区流场动态平衡原理,设计升压通风调节系统抑制有害气体下泄。对四台矿8209工作面升压系统进行了技术研究,通过计算确定了合理的升压值。现场应用结果表明,升压技术可以有效遏制上覆采空区有害气体下泄,保障下部工作面安全开采。
The Jurassic system in Datong Mining Area belongs to the close coal seam mining, harmful gas in the overburden goaf is easy to escape into the lower working face, which seriously threatens the safety of operators. The simulation test system of similar materials was used to study the laws of overburden fracture migration and fracture distribution, combined with field measured data, the process of harmful gas leakage is analyzed. Based on the principle of dynamic balance of multi-level goaf flow field, the raising pressure ventilation control system to prevent harmful gas leakage is designed. The technical research on 8209 working face raising pressure system in Sitai Mine is carried out, and the reasonable rising pressure is determined by calculation. The application results show that the raising pressure technique can effectively curb the harmful gas leakeage in overlying goaf and ensure the safe mining of the lower face.
The Jurassic system in Datong Mining Area belongs to the close coal seam mining, harmful gas in the overburden goaf is easy to escape into the lower working face, which seriously threatens the safety of operators. The simulation test system of similar materials was used to study the laws of overburden fracture migration and fracture distribution, combined with field measured data, the process of harmful gas leakage is analyzed. Based on the principle of dynamic balance of multi-level goaf flow field, the raising pressure ventilation control system to prevent harmful gas leakage is designed. The technical research on 8209 working face raising pressure system in Sitai Mine is carried out, and the reasonable rising pressure is determined by calculation. The application results show that the raising pressure technique can effectively curb the harmful gas leakeage in overlying goaf and ensure the safe mining of the lower face.
引文
[1]牛立东,王常兴,王俊峰,等.废弃小煤窑采空区自燃火区治理关键技术的应用研究[J].中国煤炭,2010,36(1):91-93.
[2]李庆军.近距离煤层群开采煤层自燃预测研究[D].西安:西安科技大学,2010.
[3]王刚,孙晋安,王海洋.基于FLUENT对火区下近距离煤层工作面CO异常涌入的数值模拟[J].中国矿业,2013,22(6):101-105.
[4]张炜,张东升,陈建本.极近距离煤层回采巷道合理位置确定[J].中国矿业大学学报,2012,41(2):182.
[5]王方田,屠世浩,高杰,等.火区下煤层群覆岩移动规律及安全开采[J].采矿与安全工程学报,2010,27(2):171-174.
[6]罗聪亮,王海桥,陈世强,等.压差对采空区空气微流动场影响的模拟研究[J].黑龙江科技大学学报,2016,26(1):1-4.
[7]张勋,邓存宝,王继仁,等.纵深大区域煤层群开采覆岩活动规律相似模拟[J].中国安全生产科学技术,2015,11(6):5-11.
[8]张宏伟,朱志洁,霍利杰,等.特厚煤层综放开采覆岩破坏高度[J].煤炭学报,2014,39(5):816-821.
[9]王春桥,王云飞,刘万兵,等.均压通风技术治理采空区CO涌出数值模拟[J].煤矿安全,2012,43(12):41-45.
[10]王刚,王锐,武猛猛,等.火区下近距离煤层开采有害气体入侵灾害防控技术[J].煤炭学报,2017,42(7):1765-1774.
[2]李庆军.近距离煤层群开采煤层自燃预测研究[D].西安:西安科技大学,2010.
[3]王刚,孙晋安,王海洋.基于FLUENT对火区下近距离煤层工作面CO异常涌入的数值模拟[J].中国矿业,2013,22(6):101-105.
[4]张炜,张东升,陈建本.极近距离煤层回采巷道合理位置确定[J].中国矿业大学学报,2012,41(2):182.
[5]王方田,屠世浩,高杰,等.火区下煤层群覆岩移动规律及安全开采[J].采矿与安全工程学报,2010,27(2):171-174.
[6]罗聪亮,王海桥,陈世强,等.压差对采空区空气微流动场影响的模拟研究[J].黑龙江科技大学学报,2016,26(1):1-4.
[7]张勋,邓存宝,王继仁,等.纵深大区域煤层群开采覆岩活动规律相似模拟[J].中国安全生产科学技术,2015,11(6):5-11.
[8]张宏伟,朱志洁,霍利杰,等.特厚煤层综放开采覆岩破坏高度[J].煤炭学报,2014,39(5):816-821.
[9]王春桥,王云飞,刘万兵,等.均压通风技术治理采空区CO涌出数值模拟[J].煤矿安全,2012,43(12):41-45.
[10]王刚,王锐,武猛猛,等.火区下近距离煤层开采有害气体入侵灾害防控技术[J].煤炭学报,2017,42(7):1765-1774.