工作面轨道顺槽附近断层上盘防隔水煤(岩)柱留设研究——以山东省宁阳-汶上煤田义桥煤矿5302工作面YF_(33)断层为例

Research on the Retention of Water-proof Coal(Rock) Pillars in the Upper Wall of the Fault Near the Track Trough in the Working Face—A Case Study of YF_(33) Fault in 5302 Working Face of Yiqiao Coal Mine in Ningyang-Wenshang Coalfield of Shandong Province

5302工作面位于五采区东北部,工作面的东部为YF_(33)断层。YF_(33)断层落差较大,3煤底板与奥陶系灰岩顶界面距离较近,隔水层厚度变小,从而使工作面受奥灰水威胁变大,对安全开采有一定的影响。在分析5302工作面附近地质及水文地质条件的基础上,对YF_(33)断层进行了探查,认为在五采区轨道下山与-480m东翼轨道巷、-473m东翼胶带巷附近断层为不含水,不导水断层。为了开采安全,采用《煤矿防治水细则》中的公式计算出合理的防隔水煤柱宽度。

The 5302 working face is located in the northeast of the fifth mining area,and its east is the YF_(33) fault.The drop of the YF_(33) fault is relatively large,resulting in a closer distance between the 3 coal floor and the top interface of the Ordovician limestone,and a smaller thickness of the impermeable layer.As a result,the working face is threatened by the Austrian grey water,and the safety mining is also affected.On the basis of analyzing the geological and hydrogeological conditions near the 5302 working face,the YF_(33) fault is explored in this paper.It is considered that the faults near the track downhill in the fifth mining area and the-480m east wing track lane and the-473m east wing belt lane are non-aqueous or non-conductive faults.In order to ensure the safety of mining,the formula in the“Detailed Rules for Water Prevention and Control in Coal Mine”is used to calculate the reasonable width of water-proof coal pillar.