State Key Laboratory of Deep Coal Safety Mining and Environmental Protection, Huainan Mining(Group)Co.
Key Laboratory of Coupled Hazards Prevention and Control in Deep Coal Mining,National Mine Safety Administration, Huaihe Energy Holding Group Co. , Ltd.
Ping'an Coal Mining Engineering Technology Research Institute Co. , Ltd.

淮南矿区近年来逐步进入深部开采,围岩应力高、环境复杂、软弱破碎、稳定性差、变形剧烈等工程技术难题日益突出,传统支护技术的局限性日显露,因此本研究基于淮南矿区潘三矿深井地质条件,采用理论分析、数值模拟、工业性实验、现场实测等方法针对深部强采动影响下煤巷围岩控制难题开展系统深入研究,分析了淮南矿区深部强采动煤巷围岩赋存特征,主要为埋深大、岩性变化大、巷道断面大、复合顶板较多、煤体强度较低等问题,根据淮南矿区煤巷围岩赋存特征分析了深部强采动煤巷控制技术难点;针对淮南矿区深部强采动煤巷围岩控制技术难点,建立了“应力优化-围岩改性-锚固强化”一体化协同控制技术体系,创新了“切顶卸压—注浆加固-厚锚固层强化”一体化围岩控制技术;在2121(3)运输巷道开展了工业试验,巷道回采期间运输巷道两帮最大累积变形量为436.6mm,底板累积最大相对位移量约为390.1mm,小于原支护方式下变形量的50%;2121(3)运输巷道顶板浅部岩层1.5~1.8m范围存在离层和裂隙发育,深部顶板岩层完整性较好,具有较好的承载性能,可以较好的维护巷道稳定性,验证了该技术体系在深部强动压煤巷围岩稳定控制上具有较好的维控效果。

With the advancement in deep part mining in Huainan mining area, the engineering technical problems, such as high wall rock stress, complex environment soft cracking, and poor stability, serious deformation, etc, has become increasingly obvious. Based on the deep geology at Pansan Mine in Huainan mining area, we employ theoretical analysis, numerical stimulation, industrial test, and in - site measurement to study coal roadway control under mining. Aiming at solving coal roadway wall rock control difficulty during strong mining in deep part of Huainan mining area, we establish an integration control technology of “stress optimization-wall rock modification-anchor reinforcement, which update ” caving unloading- casting reinforcement-thick anchoring reinforced layer technology. Industrial test is taken in No. 2121 (3) transport roadway. The maximum deformation on both sides of transport roadway during recovery is 436. 6 mm. The maximum relative, accumulative displacement of floor is 390. 1 mm, which is less than 50% deformation of original supports. In 1. 5~1. 8 m roof rock layer of No. 212 (3) roadway, it exists isolated layer and fissure development. Roof rock stratum in deep part is integrate and bears well, which presents good roadway stability and turns out good control effect of this technology on wall rock stability in coal roadway during strong mining in the deep part.

国家自然科学基金项目(51627804)

任帅,肖殿才,罗勇,等.淮南矿区强采动影响下煤巷锚网安全支护与围岩控制技术[J].煤炭工程,2024,56(11):29-37.