新集二矿1煤220106工作面底板灰岩地面超前区域探查治理及效果评价

淮南煤田是典型的华北型煤田,中煤新集能源股份有限公司新集二矿位于淮南煤田的南部,该矿区山西组1煤层处于“高水压薄阻水层”环境,开采过程遭受下伏高压灰岩岩溶承压水的威胁,加之本矿区独特的地理构造位置,形成了叠加大规模逆冲断层的多种垂向隐伏构造格局,因受煤系地层上覆巨厚推覆体片麻岩和寒武系高屏蔽及地表水体的影响,地面三维地震勘探效果不佳,难以查明1煤组至底板灰岩强含水层的垂向导(含)水通道,因此上述因素的叠加加剧了煤炭资源安全开采的水害威胁,提升了采煤事故发生概率。矿方结合采掘规划,严格按照相关要求,对受高压奥灰水威胁的1煤220106工作面开展了地面超前区域探查治理工程,以期采用多分支水平定向井工艺,在工作面内区域探查隐伏导水构造,并通过高压水泥注浆的方式进行封堵,达到工作面安全掘进与回采的目的。本文重点对新集二矿1煤220106工作面底板灰岩地面超前区域探查治理工程及其效果进行评价,可为该工作面的掘进与回采提供依据,为本区类似工程的开展提供参照。

Ground Advanced Regional Exploration Management and Effect Evaluation of 220106 Working Face of No. 1 Coal Seam in Xinji No. 2 Coal Mine

Huainan coalfield is a typical north China type coalfield. Xinji No.2 coal mine of China coal Xinji energy Co., Ltd is located in the south of Huainan coalfield. No.1 coal seam of Shanxi formation is in the environment of "high water pressure and thin water resisting layer" in this coal mining area. Therefore, No.1 coal seam mining process is threatened by high-pressure of underlying karst confined water. In addition, the unique geographical structure of the coal mining area, a variety of vertical concealed structural patterns superimposed with large-scale thrust faults have been formed. The effect of 3D seismic exploration is not good, because of the influence of thick nappe gneiss, Cambrian high shielding and surface water on coal measure strata. So it is difficult to find out the vertical guide (aquifer) water channel from No.1 coal seam to the floor limestone strong aquifer. Therefore, the superposition of the above factors aggravates the threat of water disaster in the safe mining of coal resources, increased the probability of coal mining accidents. Combined mining planning and in strict accordance with relevant requirements, Xinji No.2 coal mine carried out ground advanced regional exploration and management project in 220106 working face threatened by high pressure Ordovician limestone water. In order to adopt multi branch horizontal directional well technology to explore the concealed water conducting structure in the working face area and Plugging by high pressure cement grouting, to achieve the purpose of safe driving and mining in working face. This paper focuses on the evaluation of the ground advanced regional exploration management project and its effect of 220106 working face of No. 1 coal seam in Xinji No. 2 coal mine, which can provide a basis for the driving and mining of this working face and provide a reference for the development of similar projects in this area.