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为了解决保水与采煤这一矛盾,在论证了保水开采机理及其可行性后,神东矿区补连塔煤矿32202长壁工作面在正常回采过程中,根据浅埋煤层保水开采适用条件的初步分类研究成果,确定采高为5.3 m以下,并选用高强度液压支架和大功率高可靠性配套设备,保证工作面推进速度大于15 m/d。工作面回采后,地面水井水位观测显示,工作面中部10号水井水位,在采后25 d左右就渐趋稳定;靠近回风平巷的18号水井水位,在近1个月后才能够稳定。工作面回采稳定后,10号水井水位相对于地面升高0.66 m,18号水井水位相对于地面下降0.87 m,对第四系松散含水层影响较小,地表主要植被能够正常生长。工业性试验表明,以工作面快速推进为核心的长壁工作面保水开采技术在适宜地质条件下能够取得成功,为我国西部浅埋煤层矿区的生态环境建设和提高煤炭资源回收率提供了借鉴。
In order to solve this contradiction between water conservation and coal mining, after proofing the mechanism and feasibility of water conservation and extraction, during the normal recovery process of 32,202 longwall face in BuLinta Coal Mine, Shendong Mining Area, according to the preliminary conditions for the application of shallow water coal mining According to the classification research results, the mining height is determined to be less than 5.3 m. High-strength hydraulic supports and high-power and high-reliability supporting equipment are selected to ensure that the working face advancing speed is greater than 15 m / d. After the face mining, the observation of surface well water level shows that the water level of well 10 in the middle part of the working face becomes stable after about 25 days after harvesting. The water level of well 18 near the return airway can not be stabilized after nearly 1 month . After the working face was stabilized, the water level of No 10 wells increased 0.66 m relative to the ground, and the water level of No 18 wells decreased 0.87 m relative to the ground surface, affecting less the Quaternary loose aquifer and the vegetation on the ground surface can grow normally. Industrial tests show that the longwall coal mining technology with rapid working face as the core can succeed under appropriate geological conditions and provide reference for the ecological environment construction and coal resource recovery in the shallow coal seam mining area in western China.