School of Mines, China University of Mining and Technology
China Huaneng Huating Coal Industry Group Co., Ltd. Chicheng Coal Mine
China Huaneng Huating Coal Industry Group Co., Ltd. Technology Center
China Huaneng Zhalainuoer Coal Industry Co., Ltd. Lingquan Coal Mine

赤城煤矿1502-2工作面开切眼倾角局部超过56°,采用由上向下先导硐后扩刷施工工艺。由于下行施工导致运煤、运料、行人、顶底板安全及防倒防滑等都面临着诸多困难,出煤和运料需要安装绞车、铺设轨道、甩车翻车、调换矿车,工序十分繁杂;矿车人工装煤劳动强度大,出煤运料支护不能连续平行作业,施工效率极为低下,安全风险也极高。为实现安全高效施工,经反复模拟论证创新性采用煤矿用40T改造型刮板输送机出煤、单轨吊配合慢速绞车进行辅助运输、运煤运料行人三通道完全分离的施工方案。通过工业性试验取得成功,有效解决了急倾斜煤层大倾角开切眼施工运煤及运料难题,工人劳动强度大大降低,单进提高35%,缩短工期20d,有效缓解了采掘接续紧张局面。

The inclination angle of the open cut eye in the 1502-2 working face of Chicheng Coal Mine exceeds 56° locally, and the construction process of first guiding the adit from top to bottom and then expanding the brush is adopted. Due to downstream construction, there are many difficulties in coal transportation, material transportation, pedestrian, roof and floor safety, as well as anti-collapse and anti slip and so on. The installation of winches, laying of tracks, car dumping and overturning and switching of mining cars are required for coal production and material transportation, and the process is very complicated; the labor intensity of manual coal loading by mining cars is high, and the support for coal production and material transportation cannot be continuously operated in parallel. The construction efficiency is extremely low, and the safety risk is also extremely high. In order to achieve safe and efficient construction, after repeated simulation and demonstration, an innovative construction scheme is adopted, which uses a 40T transformation type scraper conveyor for coal mining to produce coal, a monorail crane combined with a slow winch for auxiliary transportation, and a complete separation of three channels for coal transportation and material transportation and pedestrians. Through industrial experiments, success is achieved, effectively solving the difficult problems of coal transportation and material transportation in the construction of steep inclined coal seam large inclination angle open cut eye. The labor intensity of workers is greatly reduced, with a single entry increase of 35% and a shortened construction period of 20 days, effectively alleviating the tense situation of mining and excavation continuity.