基于未确知测度理论的石英脉型钨矿山采空区稳定性评价

doi:10.11872/j.issn.1005-2518.2021.03.154

Abstract

Abstract:

Goaf is a major potential safety hazard of underground mines，and its stability has always been the focus attention of the majority of practitioners.Aiming at the difficulty in analysis and evaluation of the stability of quartz vein type wolframite ore veins and surrounding rocks，and there is no suitable method for analysis and evaluation of the stability of the goaf，the unascertained measurement theory was proposed.Firstly，11 factors affecting the stability of the goaf were selected，which including the mining width and the exposed area of roof，and the impact evaluates was conducted according to the stability classification of the goaf，thus， a single index measure function was constructed for the stability evaluation of quartz vein goaf.Then，the evaluation vector of multiple indexes comprehensive measurement was formed by determining the influence factor weight of each goaf.Finally，the stability evaluation level of each goaf is obtained based on the confidence recognition criterion.The results show that 55 are stable（Ⅰ） among the 191 goaf areas surveyed，82 are generally stable （Ⅱ），25 are less stable （Ⅲ），and 29 are unstable（Ⅳ）.The stability of the single-vein mining goaf of shallow hole retention method is generally better than that of the phase mining goaf，the less stable or unstable goaf is mainly vein zone.The recovery of the pillars greatly accelerates the instability of the goaf.The analysis also shows the mining width and the exposed area are the main factors controlling the stability of the goaf，and for this mining area，the stability limit of the mining width and the exposed area is 16 m and 800 m² respectively.Based on the highly consistent of the evaluation results with the actual situation of the stability of the goaf，it is considered that the evaluation of the stability of the goaf based on the unascertained measurement theory provides a new way for the stability evaluation of the goaf of the quartz vein type tungsten mine.The two quantitative grading standards of mining width and roof exposed area proposed in this paper can be promoted and used in the analysis and evaluation of the stability of the goaf of the same type of mine.

Key words: unascertained measure theory, classification criterion, evaluation system, tungsten mines, vein type deposit, goaf, stability evaluation

CLC Number:

TD853

Guangxiang YE,Zhiqun HUANG,Xiaojun WANG,Shubiao ZHANG,Dong YUAN. Evaluation of Goaf Stability in Vein Quartz Tungsten Mines Based on Unascertained Measure Theory[J].Gold Science and Technology, 2021, 29(3): 433-439.

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影响程度等级	采幅/m	顶板暴露面积/m²
Ⅰ级（C₁）	<3	<200
Ⅱ级（C₂）	3~8	200~800
Ⅲ级（C₃）	8~20	800~1 200
Ⅳ级（C₄）	>20	>1 200

中段	矿带号	空区编号	S₁	S₂	S₃	S₄	S₅	S₆	S₇	S₈	S₉	S₁₀	S₁₁
388	Ⅲ	Ⅲ124Ⅱ	1	2	1	2	3	3	2	1.3	94	3	1.440
	Ⅲ	Ⅲ810	4	3	2	3	4	4	4	27	1 000	4	0.740
	Ⅲ	Ⅲ68	3	3	3	3	3	3	1	7	324	4	0.793
	Ⅲ	Ⅲ46	3	3	3	4	3	3	3	2	90	3	0.900
	Ⅲ	Ⅲ13W	1	2	2	2	1	2	1	16	840	4	1.656
	Ⅲ	Ⅲ102N	4	3	2	3	4	4	3	19	685	4	0.740
	Ⅲ	Ⅲ02	2	2	2	2	1	2	1	3	120	3	0.870
	Ⅲ	Ⅲ01	4	3	2	3	4	3	3	33	1 365	4	0.857
	Ⅲ_S	2146N	4	3	3	4	4	4	2	14	504	4	0.900
	Ⅲ_S	Ⅲ126	4	3	3	4	2	4	2	3	210	4	1.556

中段	矿带号	空区编号	C₁	C₂	C₃	C₄	评价等级	实际破坏情况
388	Ⅲ	Ⅲ124Ⅱ	0.3242	0.2953	0.3805	0.0000	Ⅱ	未破坏
	Ⅲ	Ⅲ810	0.0000	0.0000	0.4005	0.5995	Ⅳ	顶板回收，间柱破坏
	Ⅲ	Ⅲ68	0.1101	0.0272	0.8627	0.0000	Ⅲ	未破坏
	Ⅲ	Ⅲ46	0.1678	0.0000	0.8322	0.0000	Ⅲ	未破坏
	Ⅲ	Ⅲ13W	0.3220	0.6518	0.0210	0.0051	Ⅱ	顶、底柱回收，间柱破坏
	Ⅲ	Ⅲ102N	0.0000	0.0371	0.3248	0.6381	Ⅳ	顶柱回收，间柱破坏
	Ⅲ	Ⅲ02	0.5000	0.5000	0.0000	0.0000	Ⅰ	未破坏
	Ⅲ	Ⅲ01	0.0000	0.0000	0.4005	0.5995	Ⅳ	顶柱自然崩落
	Ⅲ_S	2146N	0.0000	0.0361	0.2345	0.7294	Ⅳ	顶柱、间柱破坏
	Ⅲ_S	Ⅲ126	0.1717	0.2390	0.0406	0.5487	Ⅳ	顶、底柱破坏

Evaluation of Goaf Stability in Vein Quartz Tungsten Mines Based on Unascertained Measure Theory

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