School of Mining Engineering, Anhui University of Science and Technology
State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology
Taoyuan Coal Mine, Huaibei Mining Co. , Ltd.

为探究工作面过断层顶板破碎、难以管理且易造成冒顶的问题,以桃园煤矿Ⅱ1044综采工作面为工程研究背景,通过采用FLAC3D数值模拟软件模拟工作面向断层推进,研究当工作面推进到不同位置时的垂直应力分布规律、塑性区演化规律、断层滑移量,并据此制定科学有效的过断层技术措施和安全措施。研究表明:当工作面距离断层40m时,断层处应力约20MPa,断层处的塑性区已经达到直接底,同时工作面顶底板塑性区范围变大,围岩破坏严重,底板破坏深度可达47.2m。随着工作面向断层处推进,断层将被完全破坏。因此,当工作面距断层40m时,开始注入马丽散进行加固,在工作面25—55支架处注水泥浆加固,注浆后工作面支架压力基本稳定。

As the coal mining face crosses faults, the roof fractures, making it difficult to manage and likely to cave. The Ⅱ 1044 fully mechanized working face of Taoyuan Coal Mine is taken as the research background, FLAC3D is used to simulate the working face advancing towards the fault, the vertical stress distribution law, the evolution law of the plastic zone, and the slip amount of the fault face when the working face advances to different positions are studied, and scientific and effective fault crossing technical measures and safety measures are proposed accordingly. The research shows that when the working face is 40 m away from the fault, the stress at the fault is about 20 MPa, and the plastic zone at the fault has reached the immediate floor. At the same time, the range of plastic zone enlarges in the floor and roof of the working face, and the damage is serious. The damage depth of the floor can reach 47. 2 m. As the working face advances towards the fault, the fault will be completely destroyed. Therefore, when the working face is 40 m away from the fault, Malisan is injected into the broken roof for reinforcement, and cement slurry is injected into the 25—55 supports of the working face for reinforcement. After grouting, the support pressure of the working face is basically stable.

国家自然科学基金项目(51774010)

潘伟鹏, 华心祝, 刘 斌, 等. 桃园煤矿综采工作面过断层巷道注浆加固技术研究 [J]. 煤炭工程, 2023, 55(7): 58-65.