内蒙古呼吉尔特矿区新建矿井冲击地压治理模式探索

Exploration of Rock Burst Governance Model of New Built Coal Mine in Hujierte Mine Area in Inner Mongolia

呼吉尔特矿区深部煤炭资源开发过程中面临冲击地压灾害难题,主要发生临空巷道超前段冲击、工作面临空侧煤壁冲击、临空留巷滞后冲击等3类冲击。基于矿区煤层赋存及开采设计特殊性,针对性提出积极利用保护层开采、推行小煤柱护巷、多盘区跳采等超前防范措施。以葫芦素煤矿为例,提出微震台网优化方法及利用微震数据调节回采速度、判断多采空区联动及断层活化方法。开发"钻-切-压"一体化高效预裂坚硬顶板技术,利用高压水射流切缝为水力压裂提供起始裂纹,操作工艺更为简化、高效,压裂半径可达15m以上,巷帮压力降幅约50%。

Some disaster difficulty problems of rock burst appeared during coal resource development in deep of Hujierte mine area,the following three classifications of rock burst appeared, which included rock burst in advanced section of roadway along gob, coalwall burst of working face along gob, hysteresis burst of roadway along gob. Based on coal seam storage and special of coal mining de-sign, and then some advanced precautionary measures were put forward, which included that utilizing protective layer mining, imple-menting roadway protection with small coal pillar, more panel skip mining and so on, it taking Hulusu coal mine as example, andthen the method that microseism platform network optimization method and adjusting mining speed by microseism data and judging moregob linkage and fault activation and so on, ‘drilling-cutting-pressing’ integration highly effective hard roof presplitting technique wasdeveloped, the starting fracture was formed by highly pressure water jet cutting, operation process simplify and high effectively, split-ting radius could reached 15m, pressure of roadway side decreasing amplitude about 50 %.