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为解决开采条件复杂且煤体具有强冲击倾向性的工作面容易发生冲击地压的问题,以特定工程为例,通过研究冲击地压的影响因素(包括开采深度、冲击倾向性、原岩应力、顶板岩层结构特征、煤层厚度变化、地质构造、开采技术条件),确定各因素对冲击地压的影响程度.采用数值模拟方法分析工作面开采过程中煤柱应力分布以及演变规律,确定煤柱的冲击危险性,并运用多因素耦合法和模糊综合评判的方法确定工作面冲击地压的危险性和危险区域.研究表明:在对冲击地压影响因素进行分析的基础上,采用多因素耦合法对开采条件复杂的工作面进行冲击危险区域预测具有科学性与实用性,有助于受冲击威胁工作面的安全回采.
In order to solve the problem that the working face with complicated mining conditions and strong impact tendency of coal body is prone to rock burst, taking a specific project as an example, the influence factors of rock burst, including mining depth, impact propensity, , Top rock strata structure characteristics, coal seam thickness change, geological structure, mining technical conditions) to determine the impact of various factors on the impact of rockburst.The numerical simulation method is used to analyze the stress distribution and evolution law of coal pillar during the mining face, The risk of rockburst and danger zone of rockburst are determined by multi-factor coupling method and fuzzy comprehensive evaluation method.The research shows that on the basis of analyzing the influencing factors of rockburst, using multi-factor coupling The method of carrying out the prediction of the impact danger zone on the mining face with complicated mining conditions is scientific and practicable, which is helpful to the safe recovery of the mine face threatened by the impact.