重叠矿段采动下的工程响应仿真与评价

doi:10.11872/j.issn.1005-2518.2018.06.736

Abstract

Abstract:

The interaction and response law of overlapping-orebody mining are important factors that have significant influence on mining safety.The overlapping-orebody of Huashugou copper mine in Jingtieshan area where the upper iron orebody adjoins the under copper orebody was chosen as the research objects.Based on the coupled 3D Mine-Midas-FLAC^3Dtechnology，combined with practical mining and filling process of the mine，a numerical analysis model for the response of FeV orebody engineering under the condition of copper orebody in the filling section was established.Then the data including displacement and stress of stoping tunnel of FeV orebody were obtained and were used to analyze the mining process of FeV orebody.Results show that maximum excavating perturbation during mining and filling process of research area occurs in 2 865 m stoping tunnel，and the maximum displacement is 2.3 cm，the maximum amplitude of stress is 11.34% and the maximum shear stress is 1.27 MPa，respectively.TheZaxis stress in the center of cavity roof remains decreasing，and it transfers to all round.The shear stress in the center of cavity roof keeps unchanged while it around the edge of cavity changes drastically.During the mining process of test stope，2 880 m and 2 895 m stoping tunnel above FeV orebody are in steady state.Consequently，stoping process can be accelerated to boost productivity，so as to improve the recovery rate of ore.

Key words: stress, displacement, monitoring, overlapping-orebody, mining disturbance, fine modeling, simulation, safety evaluation

CLC Number:

TD853

Jianhua HU,Chen GAO,Chun YANG. Simulation and Evaluation of Engineering Response Under the Mining of Overlapping-Orebody[J].Gold Science and Technology, 2018, 26(6): 736-743.

Figures/Tables 10

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References 20

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岩体类别	体积模量K/GPa	剪切模量G/GPa	泊松比υ	黏聚力/MPa	内摩擦角/（°)	抗压强度/MPa	抗拉强度/MPa	密度/（kg·m^-3）
围岩	4.26	2.44	0.27	4.2	47.8	58.1	4.9	3 156
铜矿	6.33	3.09	0.28	6.7	50.2	83.2	6.5	3 417
铁矿	5.48	2.52	0.30	5.3	48.5	78.2	5.6	3 323
充填体	0.48	0.22	0.30	0.3	43.0	2.02	0.2	1 961

测点编号	测点位置（距采场中心）/m			最大Z方向位移/cm
测点编号	2 865 m分段	2 880 m分段	2 895 m分段	2 865 m分段	2 880 m分段	2 895 m分段
1	16	15	15	-1.26	-0.82	-0.80
2	15	14	13	-1.35	-0.95	-0.81
3	14	15	14	-0.96	-0.93	-0.72
4	2	3	3	-1.48	-0.98	-0.98
5	0	0	0	-2.30	-1.58	-1.05
6	2	2	2	-1.34	-1.34	-0.97
7	30	30	35	-0.57	-0.50	-0.53
8	30	30	35	-0.66	-0.57	-0.58
9	30	30	35	-0.73	-0.50	-0.48

测点编号	Z方向应力变化范围/MPa			变化绝对差/MPa			Z方向应力扰动率/%
测点编号	2 865 m分段	2 880 m分段	2 895 m分段	2 865 m分段	2 880 m分段	2 895 m分段	2 865 m分段	2 880 m分段	2 895 m分段
1	-14.33~-13.87	-14.23~-13.67	-13.79~-13.41	0.46	0.56	0.38	1.63	2.01	1.40
2	-14.66~-12.36	-14.10~-13.42	-13.74~-13.18	2.30	0.68	0.56	8.51	2.47	2.08
3	-14.59~-14.20	-14.07~-13.69	-13.61~-13.00	0.39	0.38	0.61	1.35	1.37	2.29
4	-14.56~-11.82	-14.26~-13.23	-13.53~-12.71	2.74	1.03	0.82	10.39	3.75	3.12
5	-14.53~-11.57	-13.88~-12.77	-13.85~-12.75	2.96	1.11	1.10	11.34	4.17	4.14
6	-14.55~-12.34	-13.97~-12.83	-13.46~-12.76	2.21	1.14	0.70	8.22	4.25	2.67
7	-14.53~-14.25	-14.22~-14.33	-13.47~-13.54	0.28	-0.11	-0.07	0.97	0.39	0.26
8	-14.53~-14.79	-13.98~-14.08	-13.45~-13.50	-0.26	-0.1	-0.05	0.89	0.36	0.19
9	-14.64~-14.88	-13.96~-13.79	-13.43~-13.46	-0.24	0.17	-0.03	0.81	0.61	0.11

测点编号	剪应力/（×10⁵Pa）
测点编号	2 865 m分段	2 880 m分段	2 895 m分段
1	-6.00	-3.32	-2.23
2	-0.85	-0.47	0.38
3	5.30	3.21	1.75
4	-11.71	-8.91	-3.74
5	1.04	-1.43	-0.79
6	12.70	6.26	3.44
7	-2.43	-1.09	-0.46
8	-0.23	-0.13	0.31
9	0.98	0.37	0.75

Simulation and Evaluation of Engineering Response Under the Mining of Overlapping-Orebody

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