摘要
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.
The burst rock happens easily under the complicated mining condition and the strong bursting liability of coal has been researched. Taking specific engineering as an example, this paper studied the main influencing factors including the mining depth, the bursting liability of coal, the stress of primary rock, the structure feature of roof strata, thickness variation of coal seam, geologic structure, and mining technology conditions, and determined the factors influencing degree of the rock burst. The method of mechanics modeling is used to analysis the distribution and evolution rule of the stress of coal pillar in the process of mining and the rock burst risk of coal pillar has been defined. The burst risk of coal face and the burst risk area are confirmed by the multi-factor coupling. The results show that the burst risk area of coal face under the complicated mining condition has been predicted accurately and practically by multi-factor coupling and fuzzy comprehensive evaluation, and the safe mining of coal face with severe rock burst can be done.
作者
陈学华
邢万里
王朝阳
阮文坦
CHEN Xuehua XING Wanli WANG Chaoyang RUAN Wentan(School of Mining Engineering, Liaoning Technical University, Fuxin 123000, China)
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2017年第1期7-15,共9页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金项目(51304110)
关键词
冲击倾向性
开采技术条件
煤柱
多因素耦合
危险区域
bursting liability
mining technology condition
coal pillar
multi-factor coupling
the danger area
