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| Water outburst risk assessment of overlying goaf water-accumulated coal seam mining in Cilinshan Mine |
| Zhang Nan |
| Cilinshan Coal Mine of Cilinshan Coal Industry Co., Ltd., Lu ' an Chemical Group, Changzi 046605, China |
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Abstract In order to determine whether the mining of No.9 coal seam in Cilinshan Mine would make the water accumulated in goaf of No.3 coal seam above inrush into working face, the empirical formula and numerical simulation method were used. It was predicted that the development height of the rock water conduction fracture zone caused by the original mining of No.9 coal seam was 65.96 ~ 69.6 m. The failure depth of No.3 coal seam floor was not less than 21 m, the average thickness of the rock layer between No.3 coal seam and No.5 coal seam was 88.02 m, and the thickness of the interlayer rock layer was slightly less than the sum of the depth of the water conduction fracture zone of No. 9 coal seam and the failure zone of No. 3 coal seam floor, which was measured by underground downward hole water pressure test method. The mining of No. 9 coal seam might make the water accumulated in goaf of No.3 coal seam above inrush into working face. It was necessary to drain the water damage in the overlying goaf before the mining of No.9101 first mining face.
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| [ 1 ] 侯超鹏. 西冯街煤业矿井水文地质特征与防治水措施[ J ]. 江西煤炭科技，2022（ 1 ）：145 - 146，151.
[ 2 ] 陈 超. 上覆采空区积水煤层开采突水危险性研究[ J ]. 中国煤炭，2021，47（ 10 ）：31 - 37.
[ 3 ] 郭阳阳. 莒山煤矿3号煤层采空区积水调查分析及防治措施[ J ]. 煤炭与化工，2021，44（ 8 ）：41 - 43.
[ 4 ] 王小勇. 蒙陕矿区大储量采空区水害综合防治技术创新与实践[ J ]. 中国煤炭，2021，47（ 8 ）：22 - 27. |
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