赵固二矿工作面断层突水防治技术

    Comprehensive Prevention and Control Techniques for Water Inrush from Faults in Zhaogu No.2 Coal Mine

    • 摘要: 为解决焦作矿区断层突水问题,以赵固二矿11011工作面为背景,采用高密度三维地震对工作面附近断层、底板岩层等进行勘测;利用探明断层建立数值模拟,分析了工作面断层突水机理,同时提出断层立体预加固技术并进行现场实验。结果表明:从断层上盘方向回采引起的断层活化程度强于从下盘回采,结合三维地震勘探结果采用立体预加固方法能有效降低工作面断层突水危险,注浆后每孔水量均未超过3 m3/h。验证了基于精准物探结果进行断层活化特征研究与所提出的断层综合防治水技术是可靠的,并成功推广应用。

       

      Abstract: To solve the problem of fault water inrush in Jiaozuo Mining Area, high-density three-dimensional seismic exploration was used to detect faults and strata near 11011 working face in Zhaogu No.2 coal mine. Based on the results of geophysical exploration, a numerical model was established to analyze the mechanism of water inrush from faults, and a comprehensive pre-reinforcement technique was proposed and applied to the working face. Results showed that the degree of fault activation caused by mining in the hanging wall was stronger than that caused by mining in the footwall. Combing the results from the seismic exploration, the comprehensive pre-reinforcement technique effectively reduced the risk of water inrush from faults, and the inflow of each hole after grouting did not exceed 3 m3/h. The comprehensive prevention and control techniques for water inrush from faults, which considered the activation characteristics of faults based on accurate geophysical exploration, verified its feasibility through successful application in practice.

       

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