厚煤层综采工作面空巷综合治理技术

为解决厚煤层开采过程中出现的多种类型空巷影响工作面正常回采等问题,采用现场调研、理论分析等方法归纳空巷的赋存特点和危害,将其划分为沿底完整型、沿顶完整型和垮落型等空巷,并针对不同空巷类型提出不同的治理方法;同时为满足不同施工方案的需要,研发一种硫铝酸盐基多性能注浆材料,进而提出厚煤层综采工作面过空巷综合治理技术;最后分别采用充填支柱支撑、高水充填和深孔注浆的方法对寺河煤矿、成庄煤矿和郭庄煤矿进行空巷治理,并考察治理效果。结果表明:有针对性地治理空巷后,在工作面过空巷期间未发生片帮、冒顶事故,顶板来压正常,保证工作面的安全回采。

Comprehensive governance technology for fully-mechanized mining face across abandoned roadways in thick coal seam

In order to address impacts of various types of abandoned roadways on normal mining of working face in thick coal seam,field surveys,theoretical analysis and other methods were used to summarize occurrence characteristics and hazards of abandoned roadways which were divided into complete types along bottom,complete types along top,and fallen ones,and different treatment methods for them were proposed.Meanwhile,in order to meet needs of various construction schemes,sulfoaluminate-based multifunctional grouting materials were developed,and comprehensive governance technology for fullymechanized mining face passing abandoned roadways in thick coal seam was proposed.Finally,with Sihe coal mine,Chengzhuang coal mine and Guozhuang coal mine taken as engineering backgrounds,filling pillar support,high water filling and deep-hole grouting methods were applied respectively to treat abandoned roadways,and their governance effectiveness was investigated.The results show that after specific treatment of empty roadways,there will be no sloughing and roof accidents,and roof pressure becomes normal,thus ensuring safe mining of working faces.