防水煤柱在断层影响下的合理化留设研究

Reasonable Retention of Waterproof Coal Pillars under Influence of Faults

以长春兴煤矿22601工作面、五家沟煤矿5214工作面采空积水区及WF_(19)大断层为研究对象,结合研究区地质、水文地质资料,对相邻工作面间防水煤柱留设尺寸的安全进行了研究。首先分析22601工作面与WF_(19)正断层、5214工作面采空区之间的联系,研究断层的充水水源及导水通道。通过理论计算和数值模拟方法对断层保护煤柱留设宽度进行计算,对比2种方法理论计算结果,并结合实际情况,初步确定工作面保护煤柱留设宽度。基于矿井安全开采的原则,结合工作面实际保护煤柱宽度、工作面初采及初次来压、断层富水区域等因素对22601工作面断层保护煤柱宽度进行安全评价,并针对断层水害防治提出建议。

Taking 22601 working face of Changchunxing Coal Mine,the goaf water accumulation area of 5214 working face of Wujiagou Coal Mine,and the WF19 fault as the research objects,combined with geological and hydrogeological data of the study area,the safety of the size of the waterproof coal pillars left between adjacent working faces was studied.Firstly,the connection between the 22601 working face and the WF19 normal fault,as well as the goaf of the 5214 working face was analyzed,and the water source and conduit of the fault were studied.By theoretical calculation and numerical simulation methods,the width of the protective coal pillar for faults was calculated.The theoretical calculation results of the two methods were compared,and combined with the actual situation,the width of the protective coal pillar for the working face was preliminarily determined.Based on the principle of safe mining in mines,combined with factors such as the actual width of the protective coal pillar in the working face,initial mining and initial pressure in the working face,and water rich areas in the fault,a safety evaluation of the width of the protective coal pillar in the 22601 working face was conducted,and suggestions were made for the prevention and control of water hazards in the fault.