大倾角综放面预掘巷道群快速过断层技术  

Fast pushing through fault of the pre-driven roadway groups in fully mechanized top-coal caving face with big dip angle

作　　者：马立强[1] 余伊河[1] 金志远[1] 李嘉明[1] 王广[1] 李永升 

机构地区：[1]中国矿业大学矿业工程学院,深部煤炭资源开采教育部重点实验室,江苏徐州221116 [2]枣庄矿业集团高庄煤矿,山东微山277605

出　　处：《采矿与安全工程学报》2015年第1期84-89,共6页Journal of Mining & Safety Engineering

基　　金：国家重点基础研究发展计划(973)项目(2015CB251600);教育部新世纪优秀人才支持计划项目(NCET-12-0957);江苏省青蓝工程项目;江苏高校优势学科建设工程项目

摘　　要：针对长壁工作面过断层时存在产量低、煤质差、工期长及安全系数低等问题,提出了预掘巷道群快速过断层技术,即在考虑断层落差、工作面开采条件及支架稳定性的基础上,确定出大倾角综放面过断层的"预想层位",并在此层位上预掘若干条巷道(巷道群),使工作面连续推过预掘巷道群过断层。此项技术的关键为:1)预掘巷道群围岩控制技术,包括其布置方式、预掘巷间岩柱尺寸及支护参数等;2)大倾角综放面过断层期间支架稳定性控制技术,即考虑走向角度对液压支架倾向稳定性及倾向角度对液压支架走向稳定性的影响,分析大倾角(双斜)综放面过断层期间支架失稳机理,得出支架不倾倒、不滑移所需的临界支护阻力,并提出对应控制技术。高庄煤矿3上1101大倾角综放面应用此项技术,快速(历时23 d)推过了落差为13.5 m的断层,保证了工作面(呈双斜状态)过断层期间原煤产量的稳定。For solving the problem of low yield, poor-quality, long duration and low safety factor during longwall face pushing through fault, the technology of fast pushing through fault of the pre-driven roadway groups in fully mechanized top-coal caving face with big dip angle（FMTCFBDA） has been put forward. Considering the fault throw, mining conditions and support stability, the ＂exceptive horizon＂ of FMTCFBDA during pushing through fault has been determined and the multiple pre-driven roadways（pre-driven roadway groups） on the horizon has been designed, consequently, working face can directly push through pre-driven roadway groups to cross over the fault. It contains two key technologies： 1） Surrounding rock control technology of pre-driven roadway groups, including pre-driven roadways groups layout, rock pillars size and support parameters, etc; 2） Support stability control technology of FMTCFBDA during pushing through the fault. Considering the strike angle influence on support dip stability and the dip angle influence on support strike stability, hydraulic support instability mechanism has been analyzed during FMTCFBDA in dual inclined state pushing through the fault, the critical support resistance which is less likely to cause topple and slip has been calculated, and corresponding control technology has been put forward. The technology has been applied in 3up1101 FMTCFBDA of Gaozhuang coal mine, and the fault with throw of 13.5 m in 23 days has been fast pushed through successfully, ensuring yield stability of the dual inclined coalface during this period.

关 键 词：预掘巷道群 断层 双斜工作面 支架稳定性 

分 类 号：TD263[矿业工程—矿井建设]