富水覆岩长壁综放开采矿压显现规律研究

Study on rock pressure behavior of longwall top coal caving mining with rich water and overlying strata

为了进一步研究富水覆岩长壁综放工作面推进过程中的矿压显现机理,以大佛寺煤矿40301工作面为工程背景,采用相似模拟的方法,研究工作面推进过程中的矿压显现规律,并掌握上覆岩层在工作面推进过程中变形破断和裂隙发展规律。研究表明,综放工作面上覆岩层矿压显现明显,基本顶初次来压和周期来压步距分别为63~72 m和27~33 m,在工作面的推进过程中,上覆岩层的裂隙发展会波及洛河组砂岩,可能会对采空区和工作面产生一定程度的危害。研究结果可为大佛寺煤矿综放开采提供理论依据,对同类地质条件下的综放开采有一定的借鉴意义。

In order to water rich rock long wall caving face propulsion mechanism research of mine pressure behavior in Dafosi Coal Mine 40301 working face as the engineering background,using similar simulation method of working face in the process of promoting the behavior law of mine pressure,and grasp the overburden deformation in the process of breaking and the law of fracture the development in advancing working face. Research shows that obvious mine strata pressure of fully-mechanized caving face,the first step pressure and the periodic pressure step distance of the old roof are 63 ~ 72 m and 27 ~ 33 m,respectively,during the advancing process of the working face,crack development in overlying strata will affect the sandstone of Luohe Formation,harm may have a certain degree of goaf and working face. The research results can provide theoretical basis for fully-mechanized top coal caving mining in grand temple coal mine,and provide guidance for fully-mechanized top coal caving under similar geological conditions.