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| Safety evaluation of mining under pressure of Ordovician limestone in Wangjialing Mine |
| Wu Zhenling |
| Bureau of Hydrogeology，China National Administration of Coal Geology，Handan 056000, China |
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Abstract In order to evaluate the safety of mining under pressure in No. 2 Coal Seam of Wangjialing Mine, based on the analysis of the water yield characteristics of Ordovician limestone aquifer, the water blocking capacity of floor water resisting layer of No. 2 Coal Seam and the depth of disturbance and failure zone of floor, the water inrush coefficient method was used to evaluate the mining under pressure in No. 2 Coal Seam. Through analysis and research, the Ordovician limestone water inrush coefficient of No. 2 Coal Seam in the mine field was 0.010 ~ 0.048 MPa/m, which was less than the critical water inrush coefficient of the structural damage zone of the coal seam floor of 0.06 MPa/m. The normal section belonged to the non water inrush risk area, the structural section belonged to the water inrush threat area, and there was no water inrush risk area.
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| [ 1 ] 方向清，王红燕，万雪林，等. 华北型煤田下组煤突（涌）水模式及特征[ J ]. 中国煤炭地质，2015，27（ 8 ）：38 - 42.
[ 2 ] 王 皓，罗安昆，董书宁，等. 奥陶系灰岩顶部作为煤层底板隔水层的可利用性研究[ J ]. 中国煤炭，2018，44（ 1 ）：34 - 38.
[ 3 ] 张党育，蒋勤明，高春芳，等. 华北型煤田底板岩溶水害区域治理关键技术研究进展[ J ]. 煤炭科学技术，2020，48（ 6 ）：31 - 36.
[ 4 ] 刘 斌. 山西长治小常煤矿3号煤层奥灰带压开采分析评价[ J ]. 华北自然资源，2019（ 5 ）：14 - 17.
[ 5 ] 周马宁. 中峪井田底板奥灰带压开采突水系数法评价[ J ]. 煤炭与化工，2021，44（ 4 ）：46 - 49.
[ 6 ] 何志远，索涛涛. 矿井奥灰水带压开采技术分析及防治水措施[ J ]. 能源与环保，2021，43（ 7 ）：55 - 61.
[ 7 ] 张士全. 华融龙宫煤矿奥灰带压开采安全评价及防治水措施[ J ]. 煤炭与化工，2021，44（ 12 ）：35 - 39. |
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