象山煤矿3号煤层地质构造复杂程度定量评价

Quantitative Evaluation of Complexity of Geological Structure of No. 3 Coal Seams in Xiangshan Coal Mine

煤矿地质构造是影响安全生产的主要因素,象山煤矿断层构造十分发育,已严重影响到煤矿的安全生产,为了更加合理地选择煤矿开采方式和提高生产效率,在详细分析该矿3号主采煤层断层构造发育特征与展布规律的基础上,选择500m×500m网格将研究区3号煤层剖分为28个评价单元。选取了断层密度、断层强度、断层走向影响指数、断层分维值4个定量评价指标,采用灰色模糊综合评价法对象山煤矿3号煤层的构造复杂程度进行了综合评价,获得了该矿3号煤层地质构造复杂程度综合评价分区图。结果将研究区划分为5个Ⅰ类单元、6个Ⅱ类单元、7个Ⅲ类单元和10个Ⅳ类单元,评价结果与矿井实际揭露情况基本符合,证实了灰色模糊综合评价方法的有效性,研究结论为煤矿未来采掘部署的调整提供了地质依据。

The geological structure of coal mine is the main factor that affects safety in production, fault structures are well developed in Xiangshan coal mine, the safety of coal production has been affected seriously, in order to more reasonable selection of coal mining methods and improve production efficiency, on the basis of detailed analysis of the development characteristics and distribution law of fault structures in No.3 main coal seam of the mine, No.3 coal seam is divided into 28 evaluation units by selecting 500m × 500m grid in this paper.Four quantitative evaluation indexes, such as fault density, fault strength, fault strike influence index and fault fractal dimension value are selected, the structural complexity of No.3 coal seam in Xiangshan coal mine is comprehensively evaluated by means of grey-fuzzy comprehensive evaluation method, and the comprehensive evaluation zoning map of the geological structure complexity of the No.3 coal seam in the mine was obtained.the study area was divided into 5 class I units, 6 class II units, 7 class III units and 10 class IV units as the results, the evaluation results are basically in accordance with the actual situation of the mine, the validity of the grey fuzzy comprehensive evaluation method is verified, and the research conclusion provides the geological basis for the adjustment of the future mining deployment of coal mines.